Peter Garnavich

Last updated
Peter Garnavich
Peter Garnavich.jpg
Born
Peter Marcus Garnavich

United States
NationalityAmerican
Alma mater University of Maryland (1980), Massachusetts Institute of Technology (1983), University of Washington (1991)
SpouseLara Arielle Phillips
Awards American Physical Society (2007), Gruber Prize in Cosmology (2007), American Association for the Advancement of Science (2012), Breakthrough Prize in Fundamental Physics (2015), American Astronomical Society (2024)
Scientific career
Institutions Dominion Astrophysical Observatory (1992-1995), Harvard–Smithsonian Center for Astrophysics (1995-1999), University of Notre Dame (2000-present)
Thesis The stellar angular correlation : clues to wide binary star properties  (1991)
Doctoral advisor Bruce Margon
Website https://physics.nd.edu/people/peter-garnavich/

Peter M. Garnavich is a faculty member of the Department of Physics and Astronomy at the University of Notre Dame. His primary research area is the study of supernovae and their diversity. [1] He has also studied gamma ray bursts and cataclysmic variable stars. [2] Garnavich is a member of a supernova search team that contributed to the discovery of dark energy in 1998. [3] [4] At Notre Dame, Garnavich has developed and participated in collaborations using the Spitzer Space Telescope, [5] the Large Binocular Telescope, [6] the Hubble Space Telescope, [7] and the Kepler Space Telescope. [8] He was named a fellow of the American Astronomical Society (AAS) in 2024. [2]

Contents

Early life & education

In the 1970s, observing a partial eclipse as a boy led to Garnavich's interest in astronomy and physics. According to Garnavich, "The eclipse is what pushed me over the edge and I decided that this is what I wanted to do for the rest of my life." [9]

Garnavich pursued amateur astronomy while in high school as a member of the American Association of Variable Star Observers (AAVSO). [10] [11] He independently discovered Nova Cygni 1975 and the night before obtained prediscovery photographs using Kodak Tri-X Pan emulsion film. The early rise of Nova Cygni 1975 was defined by his data combined with observations by Ben Mayer. [12]

Garnavich earned a bachelor of science in astronomy from the University of Maryland in 1980, a master of science in physics from Massachusetts Institute of Technology (MIT) in 1983, and a Ph.D. in astronomy from the University of Washington in 1991. [1]

Career & research

Garnavich has been a co-author on over 900 papers, a first author on over 200 papers, and has an h-index of 99 according to Google Scholar. [13]

Garnavich served as a research associate at the Space Telescope Science Institute (STSI) from 1983–1985. [1] He worked with Barry Lasker on the Guide Star Catalog [14] for the Hubble Space Telescope. [15]

Following the completion of his Ph.D., Garnavich was a postdoctoral fellow at Dominion Astrophysical Observatory from 1992–1995. [1] He used the 72-inch Plaskett telescope to measure the age and distance of open star cluster NGC 6791. [16] Garnavich also was able to obtain spectra of bright supernova SN 1993J located in nearby galaxy M81. [17]

Garnavich also was a fellow at the Center for Astrophysics | Harvard & Smithsonian from 1995–1999. In 1998, Garnavich led a team that used the Hubble Space Telescope to observe three distant high-redshift supernovae, the first published results of the High-Z Supernova Search Team. [18] [3] The supernova observations indicated that the universe was not slowing down in its expansion and would potentially expand forever. [19] [20] These images were also featured on the January 14, 1998 Astronomy Picture of the Day internet site. [21]

Garnavich was a key member of the High-Z Supernova Search Team that discovered the acceleration of the expansion of the universe. That discovery [22] was awarded the 2011 Nobel Prize in Physics, and the prize was given to High-Z team leader Brian Schmidt and team member Adam Reiss. Also receiving the prize was Saul Perlmutter of the Supernova Cosmology Project. [3] [4]

The High-Z Supernova Team, Nobel Prize ceremony, 2011. Peter Garnavich is second from the right. High Z Team Chris-V3.jpg
The High-Z Supernova Team, Nobel Prize ceremony, 2011. Peter Garnavich is second from the right.

Also while at the Center for Astrophysics, Garnavich began to collaborate with Kris Stanek to study the origin of enigmatic gamma ray bursts (GRB). These distant explosions, among the most powerful in the universe, were thought to be linked to supernovae, but confirmation of this relationship was needed. Garnavich and Stanek detected features attributed to a supernova in the spectrum of "nearby" (6-billion light years) gamma ray burst GRB 011121 which was observed in 2001. Their results linked gamma ray bursts with supernovae. [23] [24] As with this result, observations of GRB 030329 in 2003 led Garnavich to suggest that the progenitor star was likely a "hypernova", an exploding star of mass 20-50 times that of our sun. [25] [26] In 2005, after joining the faculty of the University of Notre Dame, Garnavich used the Spitzer Space Telescope to measure the heat (afterglow) in far-infrared of another gamma ray burst, GRB 050525a. [5]

In 2000, Garnavich joined the University of Notre Dame [27] as an assistant professor and was promoted to associate professor in 2003. In 2008, he earned the rank of full professor. Garnavich was appointed chair of the Department of Physics in 2017. [1] In 2022, the department was officially named the Department of Physics and Astronomy. [28] The current chair of the department is Morten Eskildsen. [29]

Observations of three high-redshift supernovae obtained using the Hubble Space Telescope. SNeIa hst big.jpg
Observations of three high-redshift supernovae obtained using the Hubble Space Telescope.

Working with colleagues from Harvard, in 2003 Garnavich published results of a study of pre-main sequence star KH 15D. As a binary star system, the team concluded that anamolous changes in brightess were likely caused by a disk of opaque matter occulting the star. [30] The paper's main author is Joshua Winn of Princeton University. [31] [32]

Also at Notre Dame, Garnavich continued his supernova and cosmology research. As a member of the ESSENCE Supernova Survey collaboration, Garnavich obtained the spectra and distances of 102 Type 1a supernovae. [33] Some of these data were used to estimate the value of the "dark energy equation of state parameter" (w), a measure of the density of dark energy in an expanding universe. [34] [35]

Using data from the SDSS-II Supernova Survey, Garnavich was able to link Type 1a supernova rates with galaxy characteristics. This work involved comparing the early behavior of supernova light curves with models of the progenitor stars. [36] The study of supernova rise times led to Brian Hayden's Ph.D. dissertation. [37]

Charlotte M. Wood of Iowa State University [38] and Benjamin Rose of Baylor University [39] earned their PhDs working under Garnavich at the University of Notre Dame in the field of supernova cosmology. [40] Wood's dissertation concerned Type 1a supernovae in elliptical galaxies and the use of supernovae in measuring the Hubble constant. [41] Benjamin Rose's dissertation addressed "systematic biases of Type Ia supernova distances used in observational cosmology". [39]

Afterglow of gamma ray burst GRB 050525a detected by the Spitzer Space Telescope. Gamma-Ray Burst 050525a.jpg
Afterglow of gamma ray burst GRB 050525a detected by the Spitzer Space Telescope.

Garnavich and other researchers utilized the famous planet hunting Kepler Space Telescope (KST) as an instrument to measure extragalactic supernovae. After its primary planet hunting mission ended, the KST concentrated its gaze on around 500 distant galaxies and collected data every 30 minutes. [8] This setup enabled the first ever capture of a Type II supernova shock wave. [42] [43]

Using the Large Binocular Telescope, Garnavich and Colin Littlefield's observations of cataclysmic variable stars revealed the second only known "propellor star." The first known such star, AE Aquarii, consists of a white dwarf star orbiting a red giant companion. Normally in such systems, material drawn off of the red giant's atmosphere becomes deposited onto the white dwarf. With propellor stars, the material is flung into space by the rotation of the white dwarf's magnetic field and appears as a gaseous prominence. [6] This second-known propellor star is named LAMOST J024048.51+195226.9 (J0240 for short). [44] Material flung from J0240 is moving at 1% of the speed of light. [6]

Garnavich has been recognized for his instruction of student researchers. [2] In 2012, Notre Dame law student Colin Littlefield published a paper in The Astronomical Journal [45] detailing the discovery of WR 142b, a rare Wolf-Rayet star. Co-authors of the paper include Garnavich and Terrig Rettig of Notre Dame. [46] In 2024, under Garnavich's tutelage, Notre Dame undergraduate McKenna Leichty discovered a potential planet within the catclysmic variable star system V808 Aurigae. [47] [48] Leichty used the 0.8-meter Sarah L. Krizmanich Telescope [49] located in an observatory on the top of Notre Dame's Jordan Hall of Science. [48]

Garnavich has also participated in public astronomy outreach events sponsored by the University of Notre Dame. In 2003, Garnavich operated Notre Dame's historic Napoleon III Telescope to provide views of the planet Mars during its historic close opposition. [30] [50] Garnavich provided a public lecture titled "Big Science: The Largest Telescope on Earth and in Space" at the Jordan Hall of Science on Oct 28, 2014. Telescope viewing on the roof of Jordan Hall was also scheduled for this event. [51]

Awards & recognition

In 1992, at the Dominion Astrophysical Observatory, Garnavich obtained a Plaskett Fellowship [52] which is granted to recent outstanding doctoral graduates in astrophysics. [53]

Garnavich is a member of the American Physical Society (APS). [54]

For his work with the High-Z Supernova Search Team, Garnavich was awarded the Gruber Prize in Cosmology (2007) and the Breakthrough Prize in Fundamental Physics (2015). [1]

Garnavich was cited in a widely circulated [55] [56] newspaper article concerning a conference named "Galileo Was Wrong, The Church Was Right" held adjacent to the University of Notre Dame in 2011. The conference organizers were a "small group of conservative Roman Catholics" who cited some Bible verses and the Church's original teachings claiming that they support the geocentric or earth-centered universe model. Garnavich was quoted as an astrophysicist at "America's flagship Catholic university" who didn't agree with the conference. According to Garnavich, geocentrism is "an idea whose time has come and gone" and "there are some people who want to move the world back to the 1950s when it seemed like a better time... these are people who want to move the world back to the 1250s... I don't really understand it at all." [56]

The American Association for the Advancement of Science (AAAS) elected Garnavich as a physics fellow in 2012. [57]

Garnavich has helped the Space Telescope Science Institute to implement the "Working Group for Anonymizing Proposal Reviews" to increase the number of women and younger researchers who have been granted time to use the Hubble Space Telescope. For this work, Garnavich was awarded the a NASA Silver Achievement Award in 2020. [58]

In 2024, Garnavich was named a fellow of the American Astronomical Society. Along with research in supernovae, gamma ray bursts, and cataclysmic variable stars, he was also recognized for his "leadership in observational collaborations" and "tireless devotion to students and the astronomical community." [2]

Discovered in 1997, asteroid 1997 SJ34 was named 31139 Garnavich in honor of Peter Garnavich. The name was suggested by Czech amateur astronomer K. Hornoch. 31139 Garnavich is a 1.9 km wide main-belt asteroid. [59]

See also

Napoleon III Telescope (University of Notre Dame)

Sarah L. Krizmanich Telescope

List of exoplanets discovered in 2024

Sites of interest

Notre Dame Department of Physics and Astronomy

Notre Dame Department of Physics and Astronomy: Peter Garnavich


Related Research Articles

<span class="mw-page-title-main">Supernova</span> Astrophysical phenomenon

A supernova is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months.

<span class="mw-page-title-main">SN 1987A</span> 1987 supernova event in the constellation Dorado

SN 1987A was a type II supernova in the Large Magellanic Cloud, a dwarf satellite galaxy of the Milky Way. It occurred approximately 51.4 kiloparsecs from Earth and was the closest observed supernova since Kepler's Supernova in 1604. Light and neutrinos from the explosion reached Earth on February 23, 1987 and was designated "SN 1987A" as the first supernova discovered that year. Its brightness peaked in May of that year, with an apparent magnitude of about 3.

<span class="mw-page-title-main">Gamma-ray burst</span> Flashes of gamma rays from distant galaxies

In gamma-ray astronomy, gamma-ray bursts (GRBs) are immensely energetic explosions that have been observed in distant galaxies, being the brightest and most extreme explosive events in the entire universe, as NASA describes the bursts as the "most powerful class of explosions in the universe". They are the most energetic and luminous electromagnetic events since the Big Bang. Gamma-ray bursts can last from ten milliseconds to several hours. After the initial flash of gamma rays, an "afterglow" is emitted, which is longer lived and usually emitted at longer wavelengths.

<span class="mw-page-title-main">Superluminous supernova</span> Supernova at least ten times more luminous than a standard supernova

A super-luminous supernova is a type of stellar explosion with a luminosity 10 or more times higher than that of standard supernovae. Like supernovae, SLSNe seem to be produced by several mechanisms, which is readily revealed by their light-curves and spectra. There are multiple models for what conditions may produce an SLSN, including core collapse in particularly massive stars, millisecond magnetars, interaction with circumstellar material, or pair-instability supernovae.

<span class="mw-page-title-main">Type Ia supernova</span> Type of supernova in binary systems

A Type Ia supernova is a type of supernova that occurs in binary systems in which one of the stars is a white dwarf. The other star can be anything from a giant star to an even smaller white dwarf.

<span class="mw-page-title-main">High-Z Supernova Search Team</span> International cosmology research group (1994–2002)

The High-Z Supernova Search Team was an international cosmology collaboration which used Type Ia supernovae to chart the expansion of the universe. The team was formed in 1994 by Brian P. Schmidt, then a post-doctoral research associate at Harvard University, and Nicholas B. Suntzeff, a staff astronomer at the Cerro Tololo Inter-American Observatory (CTIO) in Chile. The original team submitted a proposal on September 29, 1994 called A Pilot Project to Search for Distant Type Ia Supernova to the CTIO. The team on the first observing proposal comprised: Nicholas Suntzeff (PI); Brian Schmidt (Co-I); R. Chris Smith, Robert Schommer, Mark M. Phillips, Mario Hamuy, Roberto Aviles, Jose Maza, Adam Riess, Robert Kirshner, Jason Spiromilio, and Bruno Leibundgut. The project was awarded four nights of telescope time on the CTIO Víctor M. Blanco Telescope on the nights of February 25, 1995, and March 6, 24, and 29, 1995. The pilot project led to the discovery of supernova SN1995Y. In 1995, the HZT elected Brian P. Schmidt of the Mount Stromlo Observatory which is part of the Australian National University to manage the team.

<span class="mw-page-title-main">Type Ib and Ic supernovae</span> Types of supernovae caused by a star collapsing

Type Ib and Type Ic supernovae are categories of supernovae that are caused by the stellar core collapse of massive stars. These stars have shed or been stripped of their outer envelope of hydrogen, and, when compared to the spectrum of Type Ia supernovae, they lack the absorption line of silicon. Compared to Type Ib, Type Ic supernovae are hypothesized to have lost more of their initial envelope, including most of their helium. The two types are usually referred to as stripped core-collapse supernovae.

<span class="mw-page-title-main">Neutron star merger</span> Type of stellar collision

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<span class="mw-page-title-main">Kilonova</span> Neutron star merger

A kilonova is a transient astronomical event that occurs in a compact binary system when two neutron stars or a neutron star and a black hole merge. These mergers are thought to produce gamma-ray bursts and emit bright electromagnetic radiation, called "kilonovae", due to the radioactive decay of heavy r-process nuclei that are produced and ejected fairly isotropically during the merger process. The measured high sphericity of the kilonova AT2017gfo at early epochs was deduced from the blackbody nature of its spectrum.

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WR 142 is a Wolf-Rayet star in the constellation Cygnus, an extremely rare star on the WO oxygen sequence. It is a luminous and very hot star, highly evolved and close to exploding as a supernova. It is suspected to be a binary star with a companion orbiting about 1 AU away.

<span class="mw-page-title-main">SN Refsdal</span> Supernova that has been lensed

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<span class="mw-page-title-main">Fiona A. Harrison</span> American astrophysicist

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<span class="mw-page-title-main">Hypernova</span> Supernova that ejects a large mass at unusually high velocity

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<span class="mw-page-title-main">Fast blue optical transient</span> Astronomical observation

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Krzysztof Stanek is a Polish observational astrophysicist and Professor and University Distinguished Scholar at Ohio State University. He was named a University Distinguished Scholar in 2018. His research focus is on the explosive deaths of massive stars.

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<span class="mw-page-title-main">Sarah L. Krizmanich Telescope</span> University of Notre Dame campus

The Sarah L. Krizmanich Telescope (SLKT) is located at the Jordan Hall of Science on the University of Notre Dame campus. The SLKT is a 0.8-m Optical Guidance Systems reflecting telescope and it is used for undergraduate astronomy and astrophysics research and teaching. Discoveries concerning the nature of cataclysmic variable stars, and a potential exoplanet, have been obtained using the Krizmanich Telescope.

References

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  36. ↑ Smith, Mathew; Nichol, Robert C.; Dilday, Benjamin; Marriner, John; Kessler, Richard; Bassett, Bruce; Cinabro, David; Frieman, Joshua; Garnavich, Peter; Jha, Saurabh W.; Lampeitl, Hubert; Sako, Masao; Schneider, Donald P.; Sollerman, Jesper (Jul 2012). "THE SDSS-II SUPERNOVA SURVEY: PARAMETERIZING THE TYPE Ia SUPERNOVA RATE AS A FUNCTION OF HOST GALAXY PROPERTIES". The Astrophysical Journal. 755 (1): 61. arXiv: 1108.4923 . Bibcode:2012ApJ...755...61S. doi:10.1088/0004-637X/755/1/61. hdl:11427/34971. ISSN   0004-637X.
  37. ↑ Hayden, Brian T (2013). Better Understanding Type Ia Supernovae With the Goal of Making Them More Reliable Distance Indicators. University of Notre Dame. Thesis. https://doi.org/10.7274/qj72p556m8h
  38. ↑ "Charlotte M. Wood". Department of Physics and Astronomy. Retrieved 2024-06-10.
  39. 1 2 "Dr. Benjamin Rose". Baylor University Department of Physics. Retrieved Jun 10, 2024.
  40. ↑ "Physics Tree - Peter Garnavich Family Tree". academictree.org. Retrieved 2024-06-10.
  41. ↑ "Charlotte M. Wood CV" (PDF). physastro.iastate.edu. Retrieved Jun 11, 2024.
  42. ↑ Garnavich, P. M.; Tucker, B. E.; Rest, A.; Shaya, E. J.; Olling, R. P.; Kasen, D.; Villar, A. (2016-03-20). "Shock Breakout and Early Light Curves of Type II-P Supernovae Observed with Kepler". The Astrophysical Journal. 820 (1): 23. arXiv: 1603.05657 . Bibcode:2016ApJ...820...23G. doi: 10.3847/0004-637X/820/1/23 . ISSN   0004-637X.
  43. ↑ "Astronomers get first look at exploding star's shock wave". Richmond Times-Dispatch. Mar 27, 2016. pp. A15. Retrieved Jun 14, 2024.
  44. ↑ "SIMBAD query result". simbad.u-strasbg.fr. Retrieved 2024-06-11.
  45. ↑ Littlefield, Colin; Garnavich, Peter; Marion, G. H. “Howie”; Vinkó, József; McClelland, Colin; Rettig, Terrence; Wheeler, J. Craig (May 2012). "DISCOVERY OF A WOLF–RAYET STAR THROUGH DETECTION OF ITS PHOTOMETRIC VARIABILITY". The Astronomical Journal. 143 (6): 136. arXiv: 1111.3367 . Bibcode:2012AJ....143..136L. doi:10.1088/0004-6256/143/6/136. hdl:2152/34558. ISSN   1538-3881.
  46. ↑ Goethals, Shelly (2012-05-02). "Notre Dame student discovers rare star". Department of Physics and Astronomy. Retrieved 2024-06-04.
  47. ↑ Leichty, McKenna; Garnavich, Peter; Littlefield, Colin; Schwope, Axel; Kurpas, Jan; Mason, Paul A.; Beuerman, Klaus (Feb 28, 2024). "An Eccentric Planet Orbiting the Polar V808 Aurigae". The Astrophysical Journal. arXiv:2402.16959 (2): 81. arXiv: 2402.16959 . Bibcode:2024ApJ...967...81L. doi: 10.3847/1538-4357/ad3bac .
  48. 1 2 Schlehuber, Madeline (2024-04-22). "Undergraduate McKenna Leichty discovers probable planet with help from Krizmanich Telescope atop Jordan Hall". College of Science. Retrieved 2024-06-04.
  49. ↑ Gilroy, William G. (2013-09-24). "Notre Dame installs new telescope on Jordan Hall". Notre Dame News. Retrieved 2024-06-10.
  50. ↑ "Mars: Closest Encounter". NASA Hubblesite. Aug 27, 2003. Retrieved Jun 11, 2024.
  51. ↑ "At the podium". South Bend Tribune. Oct 26, 2014. pp. A10.
  52. ↑ Canada, National Research Council (2019-03-21). "Plaskett Fellowship". nrc.canada.ca. Retrieved 2024-06-04.
  53. ↑ Canada, National Research Council (2019-03-21). "Plaskett Fellows, 1975 to present". nrc.canada.ca. Retrieved 2024-06-04.
  54. ↑ Dame, Marketing Communications: Web | University of Notre. "Peter Garnavich". Department of Physics and Astronomy. Retrieved 2024-06-10.
  55. ↑ Brachear, Mayna A. (Jul 4, 2011). "For some, earth at center of it all". Chicago Tribune. p. 10. Retrieved Jun 14, 2024.
  56. 1 2 Brachear, Mayna A. (Jul 16, 2011). "Galileo was wrong, obscure group claims". The Gazette (Montreal). p. 92. Retrieved Jun 14, 2024.
  57. ↑ "AAAS Members Elected as Fellows". aaas.org. Nov 30, 2012. Retrieved Jun 4, 2024.
  58. ↑ McCool, Deanna Csomo (2020-10-30). "Garnavich receives NASA award for work on anonymous proposal team". College of Science. Retrieved 2024-06-03.
  59. ↑ "Small-Body Database Lookup". ssd.jpl.nasa.gov. Retrieved 2024-06-10.
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