IC 485

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IC 485
IC485 - SDSS DR14.jpg
IC 485 captured by SDSS
Observation data (J2000 epoch)
Constellation Gemini
Right ascension 08h 00m 19.75s
Declination +26° 42′ 04.99″
Redshift 0.027827
Heliocentric radial velocity 8,342 km/s
Distance 375 Mly (114.97 Mpc)
Apparent magnitude  (V)0.13
Apparent magnitude  (B)0.17
Characteristics
Type Sa, AGN
Size135,000 ly
Apparent size  (V)1.35' x 0.32'
Other designations
UGC 4156, PGC 22443, IRAS 07572+2650

IC 485 is a spiral galaxy located in the constellation of Gemini, located 375 million light years from Earth. It was discovered by the Austrian astronomer, Rudolf Spitaler on March 6, 1891. [1] It has an estimated diameter of 1.35' x 0.32' arcmin, meaning the galaxy is about 135,000 light years across. [2]

IC 485 is a candidate disc-maser galaxy. [3] It has a projected distance of 122.0 ± 8.5 megaparsecs. [4] [5] The morphology classification of the galaxy is Sa, and it has a low luminous active galactic nucleus (AGN) of LX ~ 5 x 1042 erg s-1. The AGN activity of IC 485 has been debated. It is either classified a LINER [6] [5] or a Seyfert type II galaxy. But its high X-ray luminosity seems to confirm the latter. [7]

Using the Karl G. Jansky Very Large Array observations, a team of astronomers lead by Jeremy Darling discovered a H2O maser containing a broad multi-component. The maser of IC 485 has a peak flux of 80 mJy with an isotopic luminosity of Liso = (868 ± 46)LΘ. [7] [8] According to Darling, he was also able to find a faint unresolved radio source with its angular resolution measured as 90 milliarcseconds ≈ 50 parsecs. [7]

In 2022, the galaxy was further studied by another team of astronomers. They discovered, it has two other 22 GHz H2O maser modules with a velocity separation of 472 km s-1. One is located in the central nuclear region while the other is at a redshifted velocity. Based on estimations on its connection with an edge-on disc, IC 485 has a mass of MBH ~ 1.2 x 107 MΘ. According to estimation of its black hole, the galaxy has a core luminosity of 1 x 1036 - 5 x 1037 erg s-1. [7]

Related Research Articles

An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars. Such excess, non-stellar emissions have been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. A galaxy hosting an AGN is called an active galaxy. The non-stellar radiation from an AGN is theorized to result from the accretion of matter by a supermassive black hole at the center of its host galaxy.

<span class="mw-page-title-main">Messier 106</span> Galaxy in the constellation Canes Venatici

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<span class="mw-page-title-main">Megamaser</span> Astrophysical maser, source of stimulated spectral line emission

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<span class="mw-page-title-main">NGC 1042</span> Spiral galaxy in the constellation Cetus

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<span class="mw-page-title-main">NGC 3147</span> Galaxy in the constellation Draco

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<span class="mw-page-title-main">NGC 708</span> Galaxy in the constellation Andromeda

NGC 708 is an elliptical galaxy located 240 million light-years away in the constellation Andromeda and was discovered by astronomer William Herschel on September 21, 1786. It is classified as a cD galaxy and is the brightest member of Abell 262. NGC 708 is a weak FR I radio galaxy and is also classified as a type 2 Seyfert galaxy.

<span class="mw-page-title-main">NGC 1386</span> Galaxy in the constellation Eridanus

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<span class="mw-page-title-main">NGC 2273</span> Galaxy in the constellation Lynx

NGC 2273 is a barred spiral galaxy located in the constellation Lynx. It is located at a distance of circa 95 million light years from Earth, which, given its apparent dimensions, means that NGC 2273 is about 100,000 light years across. It was discovered by Nils Dunér on September 15, 1867.

<span class="mw-page-title-main">NGC 4253</span> Galaxy in the constellation of Coma Berenices

NGC 4253 is a barred spiral galaxy located in the constellation Coma Berenices. It is located at a distance of about 185 million light years from Earth, which, given its apparent dimensions, means that NGC 4253 is about 65,000 light years across. It was discovered by William Herschel on February 3, 1788. It is a Seyfert galaxy.

<span class="mw-page-title-main">IRAS F11119+3257</span> Galaxy in the constellation Ursa Major

IRAS F11119+3257 or simply as F11119+3257, is a galaxy located in constellation Ursa Major. With a redshift of 0.187580, it has a light travel time distance of 2.5 billion light-years and is considered an ultraluminous infrared galaxy (ULIRG).

<span class="mw-page-title-main">PG 0844+349</span> Galaxy in the constellation Lynx

PG 0844+349, also known as TON 951, is a galaxy in the southern constellation Lynx, near the border of Cancer. Its redshift is 0.064000, putting the galaxy at 849 million light-years away from Earth.

<span class="mw-page-title-main">IRAS 13218+0552</span> Galaxy merger located in the constellation Virgo

IRAS 13218+0552 known as SFRS 263, is a galaxy merger located in the Virgo constellation. Its redshift is 0.202806, putting the object at 2.6 billion light-years away from Earth. It is a Seyfert galaxy and a luminous infrared galaxy.

<span class="mw-page-title-main">NGC 5495</span> Very large barred spiral galaxy in the constellation Hydra

NGC 5495 is a very large barred spiral galaxy located in the constellation Hydra. Its speed relative to the cosmic microwave background is 6,989 ± 20 km/s, which corresponds to a Hubble distance of 103.1 ± 7.2 Mpc. NGC 5495 was discovered by British astronomer John Herschel in 1834.

<span class="mw-page-title-main">SDSS J0849+1114</span> Trio of interacting galaxies in the constellation Cancer

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<span class="mw-page-title-main">SDSS J135646.10+102609.0</span> Low-redshift quasar and galaxy merger in the constellation Boötes

SDSS J135646.10+102609.0 known as SDSS J1356+1026 and J1356+1026, is a low redshift quasar and galaxy merger located in the constellation of Boötes. It is located 1.85 billion light years from Earth. It is an ultraluminous inflared galaxy. It is considered radio-quiet with an unresolved radio source.

<span class="mw-page-title-main">IC 860</span> Galaxy in the constellation of Coma Berenices

IC 860 is a barred spiral galaxy in the constellation of Coma Berenices. It is located 155 million light years away from Earth. It was discovered on June 16, 1892, by Stephan Javelle, a French astronomer. It is a peculiar galaxy.

<span class="mw-page-title-main">NGC 3341</span> Peculiar galaxy in the constellation Sextans

NGC 3341 is a peculiar galaxy located in the constellation of Sextans. It is located 415 million light years away from Earth and has a diameter of 170,000 light years. It was discovered by Albert Marth on March 22, 1865, who described the object as "very faint and small". The galaxy is classified a minor galaxy merger system, with two known companions revealed as offset active galactic nuclei (AGN).

<span class="mw-page-title-main">IRAS 19254-7245</span> Galaxy in the constellation Pavo

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<span class="mw-page-title-main">IC 1481</span> Galaxy in the constellation Pisces

IC 1481 is a spiral galaxy located in the Pisces constellation. It is located 289 million light years from Earth and was discovered by Austrian astronomer, Rudolf Spitaler on October 6, 1891. The galaxy has an approximate diameter of 65,000 light years with a surface brightness of 12.8 square arcmin.

<span class="mw-page-title-main">RX J1633.3+4718</span> Narrow-line Seyfert galaxy located in the constellation Hercules

RX J1633.3+4718 known as RXS J16333+4718 according to VLBI Network observations, is a narrow-line Seyfert 1 galaxy, located in the constellation of Hercules. It has a redshift of (z) 0.116 and is located 1.75 billion light years from Earth. The first known reference to this galaxy comes from a radio source which was identified in 1995 in the IRAS catalogue as F16319+4725.

References

  1. ↑ "Index Catalog Objects: IC 450 - 499". cseligman.com. Retrieved 2024-09-20.
  2. ↑ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-09-20.
  3. ↑ Ladu, Elisabetta; Tarchi, Andrea; Castangia, Paola; Surcis, Gabriele; Braatz, James A.; Panessa, Francesca; Pesce, Dominic (2024-01-01). "IC 485 : A candidate for a new disk-maser galaxy". Cosmic Masers: Proper Motion Toward the Next-Generation Large Projects. 380: 45–49. Bibcode:2024IAUS..380...45L. doi:10.1017/S174392132300248X.
  4. ↑ Kamali, F.; Henkel, C.; Brunthaler, A.; Impellizzeri, C. M. V.; Menten, K. M.; Braatz, J. A.; Greene, J. E.; Reid, M. J.; Condon, J. J.; Lo, K. Y.; Kuo, C. Y.; Litzinger, E.; Kadler, M. (September 2017). "Radio continuum of galaxies with H2O megamaser disks: 33 GHz VLA data". Astronomy & Astrophysics. 605: A84. arXiv: 1706.02699 . doi:10.1051/0004-6361/201730899. ISSN   0004-6361.
  5. 1 2 "IC 485: a LINER galaxy with an elusive accretion disc! | EVLBI". www.evlbi.org. Retrieved 2024-09-20.
  6. ↑ Liu, Xin; Shen, Yue; Strauss, Michael A.; Hao, Lei (2011-08-01). "Active Galactic Nucleus Pairs from the Sloan Digital Sky Survey. I. The Frequency on ~5-100 kpc Scales". The Astrophysical Journal. 737 (2): 101. arXiv: 1104.0950 . Bibcode:2011ApJ...737..101L. doi:10.1088/0004-637X/737/2/101. ISSN   0004-637X.
  7. 1 2 3 4 Ladu, E.; Tarchi, A.; Castangia, P.; Surcis, G.; Braatz, J. A.; Panessa, F.; Pesce, D. W. (2024-02-01). "IC 485: A new candidate disc-maser galaxy at ∼100 Mpc - Milliarcsecond resolution study of the galaxy nucleus and the H2O megamaser". Astronomy & Astrophysics. 682: A25. arXiv: 2310.08998 . doi:10.1051/0004-6361/202347795. ISSN   0004-6361.
  8. ↑ Darling, Jeremy (March 2017). "How to Detect Inclined Water Maser Disks (and Possibly Measure Black Hole Masses)". The Astrophysical Journal. 837 (2): 100. arXiv: 1702.06545 . doi: 10.3847/1538-4357/aa6114 . ISSN   0004-637X.
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