Astronomy:PGC 29820

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PGC 29820
PGC 29820 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationSextans
Right ascension10h 13m 46.82s
Declination-00d 54m 51.0s
Redshift0.04244
Helio radial velocity12,723 km/s
Distance600 Mly (183.96 Mpc)
Group or clusterAbell 957
Apparent magnitude (V)0.11
Apparent magnitude (B)0.15
Characteristics
TypeSb(f), Seyfert 2
Size120,000 ly
Other designations
LEDA 29820, CGCG 008-077, 2dFGRS N288Z210, AGC 500048, NVSS J101346-005449, JO204

PGC 29820 (known as JO204) is a spiral galaxy 600 million light-years from the Solar System, in the Sextans constellation.[1] The galaxy is about 120,000 light-years in diameter and is a member of Abell 957, a low-mass galaxy cluster.[2] The first known reference to this galaxy is from volume I of the Catalogue of Galaxies and of Clusters of Galaxies compiled by Fritz Zwicky in 1961, where it was listed as CGCG 008-077.[3]

Characteristics

PGC 29820 is classified a massive galaxy with a stellar mass of M* = 4 x1010 M.[4] It contains an active galactic nucleus with double-peaked narrow lines.[5][6] Moreover, it is also a Seyfert 2 galaxy.[7]

PGC 29820 is classified a jellyfish galaxy.[8][9][10] According to Gullieuszik, the galaxy is currently in a first phrase of infalling into the cluster where it is subjected to ram pressure by the intracluster medium.[2]

Because dense gas is compressed, it eventually collapses to form new stars in both the galaxy's tail and its disk.[4] According to researchers, the stars inside the tail, has a star formation rate of 0.22 M○ yr1[11] which began during the last 500 million years.[2]

In additional, PGC 29820 shows a large presence of molecular gas making up H2 mass of 8.3 billion M○. Looking at ratio of total molecular hydrogen mass and stellar mass, it is estimated as 0.42.[12]

See also

References

  1. ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=22290&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 
  2. ↑ 2.0 2.1 2.2 Gullieuszik, Marco; Poggianti, Bianca M.; Moretti, Alessia; Fritz, Jacopo; Jaffé, Yara L.; Hau, George; Bischko, Jan C.; Bellhouse, Callum et al. (1 September 2017). "GASP. IV. A Muse View of Extreme Ram-pressure-stripping in the Plane of the Sky: The Case of Jellyfish Galaxy JO204". The Astrophysical Journal 846 (1): 27. doi:10.3847/1538-4357/aa8322. ISSN 0004-637X. Bibcode: 2017ApJ...846...27G. 
  3. ↑ Zwicky, F.; Herzog, E.; Wild, P. (1961). Catalogue of galaxies and of clusters of galaxies, Vol. I. p. 26. Bibcode: 1961cgcg.book.....Z. https://ui.adsabs.harvard.edu/abs/1961cgcg.book.....Z/abstract. 
  4. ↑ 4.0 4.1 Deb, Tirna; Verheijen, Marc A W; Gullieuszik, Marco; Poggianti, Bianca M; van Gorkom, Jacqueline H; Ramatsoku, Mpati; Serra, Paolo; Moretti, Alessia et al. (23 April 2020). "GASP XXV: neutral hydrogen gas in the striking jellyfish galaxy JO204". Monthly Notices of the Royal Astronomical Society 494 (4): 5029–5043. doi:10.1093/mnras/staa968. ISSN 0035-8711. 
  5. ↑ Wang, Jian-Min; Chen, Yan-Mei; Hu, Chen; Mao, Wei-Ming; Zhang, Shu; Bian, Wei-Hao (1 November 2009). "Active Galactic Nuclei with Double-Peaked Narrow Lines: Are they Dual Active Galactic Nuclei?". The Astrophysical Journal 705 (1): L76–L80. doi:10.1088/0004-637X/705/1/L76. ISSN 0004-637X. Bibcode: 2009ApJ...705L..76W. https://ui.adsabs.harvard.edu/abs/2009ApJ...705L..76W. 
  6. ↑ Nevin, R.; Comerford, J.; Müller-Sánchez, F.; Barrows, R.; Cooper, M. (1 November 2016). "The Origin of Double-peaked Narrow Lines in Active Galactic Nuclei. II. Kinematic Classifications for the Population at z < 0.1". The Astrophysical Journal 832 (1): 67. doi:10.3847/0004-637X/832/1/67. ISSN 0004-637X. Bibcode: 2016ApJ...832...67N. 
  7. ↑ Véron-Cetty, M. -P.; Véron, P. (1 August 2006). "A catalogue of quasars and active nuclei: 12th edition". Astronomy and Astrophysics 455 (2): 773–777. doi:10.1051/0004-6361:20065177. ISSN 0004-6361. Bibcode: 2006A&A...455..773V. https://ui.adsabs.harvard.edu/abs/2006A&A...455..773V. 
  8. ↑ information@eso.org. "A jellyfish and the ram" (in en). https://www.spacetelescope.org/images/potw2315a/. 
  9. ↑ Poggianti, B. M.; Fasano, G.; Omizzolo, A.; Gullieuszik, M.; Bettoni, D.; Moretti, A.; Paccagnella, A.; Jaffé, Y. L. et al. (1 March 2016). "Jellyfish Galaxy Candidates at Low Redshift". The Astronomical Journal 151 (3): 78. doi:10.3847/0004-6256/151/3/78. ISSN 0004-6256. Bibcode: 2016AJ....151...78P. 
  10. ↑ "Hubble Spots a Galaxy with Tendrils - NASA Science" (in en-US). https://science.nasa.gov/missions/hubble/hubble-spots-a-galaxy-with-tendrils/. 
  11. ↑ Poggianti, Bianca M.; Gullieuszik, Marco; Tonnesen, Stephanie; Moretti, Alessia; Vulcani, Benedetta; Radovich, Mario; Jaffé, Yara; Fritz, Jacopo et al. (1 February 2019). "GASP XIII. Star formation in gas outside galaxies". Monthly Notices of the Royal Astronomical Society 482 (4): 4466–4502. doi:10.1093/mnras/sty2999. ISSN 0035-8711. Bibcode: 2019MNRAS.482.4466P. 
  12. ↑ Moretti, A.; Paladino, R.; Poggianti, B. M.; D'Onofrio, M.; Bettoni, D.; Gullieuszik, M.; Jaffé, Y. L.; Vulcani, B. et al. (1 October 2018). "GASP – X. APEX observations of molecular gas in the discs and in the tails of ram-pressure stripped galaxies". Monthly Notices of the Royal Astronomical Society 480 (2): 2508–2520. doi:10.1093/mnras/sty2021. ISSN 0035-8711. Bibcode: 2018MNRAS.480.2508M. 



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