HD 181327

Last updated
HD 181327
Eta Telescopii legacy dr10.jpg
Image of Eta Telescopii and HD 181327 with the legacy surveys
Observation data
Epoch J2000       Equinox J2000
Constellation Telescopium [1]
Right ascension 19h 22m 58.944s [2]
Declination −54° 32′ 16.98″ [2]
Apparent magnitude  (V)7.04±0.01 [3]
Characteristics
Evolutionary stage main sequence [2]
Spectral type F6V [4]
Astrometry
Radial velocity (Rv)0.07±0.13 [2] km/s
Proper motion (μ)RA: +24.403±0.022 mas/yr [2]
Dec.: −82.186±0.016 mas/yr [2]
Parallax (π)20.9306±0.0286  mas [2]
Distance 155.8 ± 0.2  ly
(47.78 ± 0.07  pc)
Absolute magnitude  (MV)+3.47 [1]
Details [5]
Mass 1.36±0.02  M☉
Radius 1.32±0.01  R☉
Luminosity 0.44±0.02  L☉
Surface gravity (log g)4.33±0.01  cgs
Temperature 6,498+56
−53  K
Metallicity [Fe/H]0.05±0.06  dex
Rotation 1.542±0.048 d
Age ~18.5 [6]   Myr
Other designations
HIP  95270, IRAS  19189−5438, CD−54 8270, 2MASS  J19225894−5432170, TYC 8765-638-1, WISE  J192258.97−543217.8, CPC 19 7662
Database references
SIMBAD data

HD 181327 is a young F-type main-sequence star located 156 light years from Earth in the constellation of Telescopium. It is part of the Beta Pictoris Moving Group. HD 181327 is surrounded by a thin debris disk which is often called a Kuiper Belt analog because it is full of icy bodies colliding within the disk. Large amounts of water ice was detected in the debris disk of HD 181327 by using the James Webb Space Telescope.

Contents

The star co-moves with Eta Telescopii. [7] No directly imaged exoplanets were detected in a search with the Very Large Telescope. [8]

A Kuiper belt analogue

Hubble image of the disk around HD 181327. The image shows that the top part of the disk is brighter. Circumstellar Disk - HD 181327.jpg
Hubble image of the disk around HD 181327. The image shows that the top part of the disk is brighter.

The debris disk was first directly imaged in 2006 with Hubble NICMOS as a debris ring, located 86  AU from the star. [9] The debris ring around HD 181327 is often compared to the Kuiper belt. [10] [11] [6] Observations with the ALMA observatory measured its size to be 23.2±1.0 AU and its dust mass to be 0.422±0.005  M🜨 . [11] Observations with the Herschel Space Observatory and ATCA array showed that the debris ring contains micron-sized grains of porous amorphous silicates and carbonaceous material, with a layer of ice. [12] The disk was observed with SPHERE in polarized light in the H-band. The observation require a more refracting component, such as iron-bearing minerals. The near-infrared polarization was described as strikingly similar to solar-system comets. [13] JWST observations found crystalline water ice (H2O), iron sulfide (FeS) and olivine (MgFeSiO4) inside the debris ring. [6]

Evidence for collisions

Asymmetry of the debris ring was first suspected from observations with Gemini. [10] A better resolution image was taken with Hubble STIS, revealing asymmetries in the debris ring. The researchers suggest that either the ring experienced interactions with the interstellar medium, or that an object with >1% the mass of Pluto was catastrophically disrupted. [7] Observations in 2008 with Spitzer hinted for the first time that the debris ring contains crystalline water ice, showing that the debris ring could be a Kuiper Belt analogue. The water ice has to be constantly replenished by collisions, because water ice has a lifetime of around only 1400 years, which is much shorter than the age of about 12 Million years of the system. [10] The water ice detection was confirmed in 2025 with JWST NIRSpec. The water ice was detected with a 3.1 μm Fresnel peak that gets stronger with increasing distance from the star. At around 85 AU the water ice fraction is only 0.1% and at around 113 AU the water ice fraction increases to 13.9%. The observations also tentatively detected carbon dioxide ice (CO2) at 105–120 AU. [6] Observations with ALMA in 2016 showed carbon monoxide (CO) gas inside the dust ring. CO gas is commonly found in much younger protoplanetary disks, but in debris disks it should not be present and is sometimes seen as evidence for collisions of exocomets. [11]

The HD 181327 planetary system [11]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(years)		 Eccentricity Inclination Radius
debris ring74.4–97.6 AU 30.0±0.7 ° —

See also

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27 –L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  4. ↑ Torres, C. a. O.; Quast, G. R.; da Silva, L.; de La Reza, R.; Melo, C. H. F.; Sterzik, M. (December 2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695–708. arXiv: astro-ph/0609258 . Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. ISSN   0004-6361.
  5. ↑ Reggiani, Henrique; Galarza, Jhon Yana; Schlaufman, Kevin C.; Sing, David K.; Healy, Brian F.; McWilliam, Andrew; Lothringer, Joshua D.; Pueyo, Laurent (January 2024). "Insight into the Formation of β Pic b through the Composition of Its Parent Protoplanetary Disk as Revealed by the β Pic Moving Group Member HD 181327". The Astronomical Journal. 167 (1): 45. arXiv: 2311.12210 . Bibcode:2024AJ....167...45R. doi: 10.3847/1538-3881/ad0f93 . ISSN   0004-6256.
  6. 1 2 3 4 Xie, Chen; Chen, Christine H.; Lisse, Carey M.; Hines, Dean C.; Beck, Tracy; Betti, Sarah K.; Pinilla-Alonso, Noemí; Ingebretsen, Carl; Worthen, Kadin; Gáspár, András; Wolff, Schuyler G.; Bolin, Bryce T.; Pueyo, Laurent; Perrin, Marshall D.; Stansberry, John A. (May 2025). "Water ice in the debris disk around HD 181327". Nature. 641 (8063): 608–611. arXiv: 2505.08863 . Bibcode:2025Natur.641..608X. doi:10.1038/s41586-025-08920-4. ISSN   1476-4687. PMID   40369138.
  7. 1 2 Stark, Christopher C.; Schneider, Glenn; Weinberger, Alycia J.; Debes, John H.; Grady, Carol A.; Jang-Condell, Hannah; Kuchner, Marc J. (July 2014). "Revealing Asymmetries in the HD 181327 Debris Disk: A Recent Massive Collision or Interstellar Medium Warping". The Astrophysical Journal. 789 (1): 58. arXiv: 1405.7055 . Bibcode:2014ApJ...789...58S. doi:10.1088/0004-637X/789/1/58. ISSN   0004-637X.
  8. ↑ Gauchet, L.; Lacour, S.; Lagrange, A.-M.; Ehrenreich, D.; Bonnefoy, M.; Girard, J. H.; Boccaletti, A. (October 2016). "Sparse aperture masking at the VLT. II. Detection limits for the eight debris disks stars β Pic, AU Mic, 49 Cet, η Tel, Fomalhaut, g Lup, HD 181327 and HR 8799". Astronomy and Astrophysics. 595: A31. arXiv: 1606.08498 . Bibcode:2016A&A...595A..31G. doi:10.1051/0004-6361/201526404. ISSN   0004-6361.
  9. ↑ Schneider, Glenn; Silverstone, Murray D.; Hines, Dean C.; Augereau, Jean-Charles; Pinte, Christophe; Ménard, François; Krist, John; Clampin, Mark; Grady, Carol; Golimowski, David; Ardila, David; Henning, Thomas; Wolf, Sebastian; Rodmann, Jens (October 2006). "Discovery of an 86 AU Radius Debris Ring around HD 181327". The Astrophysical Journal. 650 (1): 414–431. arXiv: astro-ph/0606213 . Bibcode:2006ApJ...650..414S. doi:10.1086/506507. ISSN   0004-637X.
  10. 1 2 3 Chen, Christine H.; Fitzgerald, Michael P.; Smith, Paul S. (December 2008). "A Possible Icy Kuiper Belt around HD 181327". The Astrophysical Journal. 689 (1): 539–544. arXiv: 0808.2273 . Bibcode:2008ApJ...689..539C. doi:10.1086/592567. ISSN   0004-637X.
  11. 1 2 3 4 Marino, S.; Matrà, L.; Stark, C.; Wyatt, M. C.; Casassus, S.; Kennedy, G.; Rodriguez, D.; Zuckerman, B.; Perez, S.; Dent, W. R. F.; Kuchner, M.; Hughes, A. M.; Schneider, G.; Steele, A.; Roberge, A. (August 2016). "Exocometary gas in the HD 181327 debris ring". Monthly Notices of the Royal Astronomical Society. 460 (3): 2933–2944. arXiv: 1605.05331 . Bibcode:2016MNRAS.460.2933M. doi: 10.1093/mnras/stw1216 . ISSN   0035-8711.
  12. ↑ Lebreton, J.; Augereau, J.-C.; Thi, W.-F.; Roberge, A.; Donaldson, J.; Schneider, G.; Maddison, S. T.; Ménard, F.; Riviere-Marichalar, P.; Mathews, G. S.; Kamp, I.; Pinte, C.; Dent, W. R. F.; Barrado, D.; Duchêne, G. (March 2012). "An icy Kuiper belt around the young solar-type star HD 181327". Astronomy and Astrophysics. 539: A17. arXiv: 1112.3398 . Bibcode:2012A&A...539A..17L. doi:10.1051/0004-6361/201117714. ISSN   0004-6361.
  13. ↑ Milli, J.; Choquet, E.; Tazaki, R.; Ménard, F.; Augereau, J.-C.; Olofsson, J.; Thébault, P.; Poch, O.; Levasseur-Regourd, A.-C.; Lasue, J.; Renard, J. B.; Hadamcik, E.; Baruteau, C.; Schmid, H. M.; Engler, N. (2024-03-01). "The polarisation properties of the HD 181327 debris ring - Evidence for sub-micron particles from scattered light observations". Astronomy & Astrophysics. 683: A22. arXiv: 2312.02000 . Bibcode:2024A&A...683A..22M. doi:10.1051/0004-6361/202347933. ISSN   0004-6361.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.