Astronomy:UGC 5101

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Short description: Galaxy in the constellation of Ursa Major
UGC 5101
Hubble Interacting Galaxy UGC 5101 (2008-04-24).jpg
UGC 5101 by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension 09h 35m 51.6s[1]
Declination+61° 21′ 11″[1]
Redshift0.039367 ± 0.000007 [1]
Helio radial velocity11,802 ± 2 km/s[1]
Distance528 Mly (162 Mpc)[1]
Apparent magnitude (V)15.1
Characteristics
TypeS? [1]
Apparent size (V)0.83′ × 0.45′[1]
Notable featuresUltraluminour infrared galaxy
Other designations
MCG +10-14-025, IRAS 09320+6134, PGC 27292[1]

UGC 5101 is a galaxy merger located in the constellation Ursa Major. It is located at a distance of about 530 million light years from Earth. It is an ultraluminous infrared galaxy.[1] The total infrared luminosity of the galaxy is estimated to be 1011.95 L☉ and the galaxy has a total star formation rate of 105 M☉ per year.[2]

UGC 5101 has a single nucleus surrounded by spiral isophotes.[3] The nucleus of UGC 5101 has been found to be active and it has been categorised as a type 1.5 Seyfert galaxy or a LINER based on the radio continuum.[4][5] The most accepted theory for the energy source of active galactic nuclei is the presence of an accretion disk around a supermassive black hole. The mass of the black hole in the centre of UGC 5101 is estimated to be 108.2 (160 million) M☉ based on stellar velocity dispersion.[6] The galaxy also hosts a water megamaser, probably originating from the nucleus.[7]

The nucleus emits hard X-rays, which are strongly absorbed, while there is also a soft X-rays component, which could originate from a hidden starburst region.[8] Also NeV emission has been detected in the nucleus, indicating the presence of a hot gas in the coronal line region, while hot dust has been detected around the nucleus, as indicated by the presence of PAH emission and strong silicate absorption.[9][10][11] The nucleus is surrounded by a dust torus with an opening angle larger than 41° which partly obstructs the nucleus with a column density of NHLS about 1.3×1024 cm−2. The hole of the torus is covered with compton thin material.[12] The integrated intensities of HCN to 13CO indicate the gas in the torus is very dense.[13] When observed with very-long-baseline interferometry the galaxy features a ridgeline that could be compact jets generated by the active nucleus.[14]

The galaxy has a tidal tail, seen edge on, and a faint halo of stars that was created during the merger.[15] A second tidal tail appears to loop around the nucleus, forming a ring.[3]

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 "NASA/IPAC Extragalactic Database". Results for UGC 5101. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=UGC+5101. 
  2. ↑ Esposito, Federico; Vallini, Livia; Pozzi, Francesca; Casasola, Viviana; Mingozzi, Matilde; Vignali, Cristian; Gruppioni, Carlotta; Salvestrini, Francesco (16 March 2022). "AGN impact on the molecular gas in galactic centres as probed by CO lines". Monthly Notices of the Royal Astronomical Society 512 (1): 686–711. doi:10.1093/mnras/stac313. 
  3. ↑ 3.0 3.1 Scoville, N. Z.; Evans, A. S.; Thompson, R.; Rieke, M.; Hines, D. C.; Low, F. J.; Dinshaw, N.; Surace, J. A. et al. (March 2000). "NICMOS Imaging of Infrared-Luminous Galaxies". The Astronomical Journal 119 (3): 991–1061. doi:10.1086/301248. Bibcode: 2000AJ....119..991S. 
  4. ↑ Abrahamyan, H. V.; Mickaelian, A. M.; Paronyan, G. M.; Mikayelyan, G. A. (September 2020). "Classification by Activity Type of a Sample of Active Galaxies with Radio Emission". Astrophysics 63 (3): 322–333. doi:10.1007/s10511-020-09637-0. Bibcode: 2020Ap.....63..322A. 
  5. ↑ Malkan, Matthew A.; Jensen, Lisbeth D.; Rodriguez, David R.; Spinoglio, Luigi; Rush, Brian (6 September 2017). "Emission Line Properties of Seyfert Galaxies in the 12 μ m Sample". The Astrophysical Journal 846 (2): 102. doi:10.3847/1538-4357/aa8302. Bibcode: 2017ApJ...846..102M. 
  6. ↑ Akylas, A.; Papadakis, I.; Georgakakis, A. (October 2022). "Black hole mass estimation using X-ray variability measurements in Seyfert galaxies". Astronomy & Astrophysics 666: A127. doi:10.1051/0004-6361/202244162. Bibcode: 2022A&A...666A.127A. https://www.aanda.org/articles/aa/full_html/2022/10/aa44162-22/T6.html. 
  7. ↑ Zhang, J. S.; Henkel, C.; Kadler, M.; Greenhill, L. J.; Nagar, N.; Wilson, A. S.; Braatz, J. A. (May 2006). "Extragalactic H 2 O masers and X-ray absorbing column densities". Astronomy & Astrophysics 450 (3): 933–944. doi:10.1051/0004-6361:20054138. Bibcode: 2006A&A...450..933Z. 
  8. ↑ Imanishi, Masatoshi; Terashima, Yuichi; Anabuki, Naohisa; Nakagawa, Takao (20 October 2003). "X-Ray Evidence of a Buried Active Galactic Nucleus in UGC 5101". The Astrophysical Journal 596 (2): L167–L170. doi:10.1086/379503. Bibcode: 2003ApJ...596L.167I. 
  9. ↑ Armus, L.; Charmandaris, V.; Bernard-Salas, J.; Spoon, H. W. W.; Marshall, J. A.; Higdon, S. J. U.; Desai, V.; Teplitz, H. I. et al. (10 February 2007). "Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph on the Spitzer Space Telescope . II. The IRAS Bright Galaxy Sample". The Astrophysical Journal 656 (1): 148–167. doi:10.1086/510107. Bibcode: 2007ApJ...656..148A. 
  10. ↑ Martínez-Paredes, M.; Alonso-Herrero, A.; Aretxaga, I.; Ramos Almeida, C.; Hernán-Caballero, A.; González-Martín, O.; Pereira-Santaella, M.; Packham, C. et al. (21 December 2015). "A deep look at the nuclear region of UGC 5101 through high angular resolution mid-IR data with GTC/CanariCam". Monthly Notices of the Royal Astronomical Society 454 (4): 3577–3589. doi:10.1093/mnras/stv2134. 
  11. ↑ Armus, L.; Charmandaris, V.; Spoon, H. W. W.; Houck, J. R.; Soifer, B. T.; Brandl, B. R.; Appleton, P. N.; Teplitz, H. I. et al. (September 2004). "Observations of Ultraluminous Infrared Galaxies with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope : Early Results on Markarian 1014, Markarian 463, and UGC 5101". The Astrophysical Journal Supplement Series 154 (1): 178–183. doi:10.1086/422915. Bibcode: 2004ApJS..154..178A. 
  12. ↑ Oda, Saeko; Tanimoto, Atsushi; Ueda, Yoshihiro; Imanishi, Masatoshi; Terashima, Yuichi; Ricci, Claudio (30 January 2017). "Shedding Light on the Compton-thick Active Galactic Nucleus in the Ultraluminous Infrared Galaxy UGC 5101 with Broadband X-Ray Spectroscopy". The Astrophysical Journal 835 (2): 179. doi:10.3847/1538-4357/835/2/179. Bibcode: 2017ApJ...835..179O. 
  13. ↑ Cruz-González, I; Gómez-Ruiz, A I; Caldú-Primo, A; Benítez, E; Rodríguez-Espinosa, J M; Krongold, Y; Aretxaga, I; Snell, R et al. (17 October 2020). "Early science with the LMT: molecular torus in UGC 5101". Monthly Notices of the Royal Astronomical Society 499 (2): 2042–2050. doi:10.1093/mnras/staa2949. 
  14. ↑ Lonsdale, Carol J.; Lonsdale, Colin J.; Smith, Harding E.; Diamond, Philip J. (August 2003). "VLBI Imaging of Luminous Infrared Galaxies: Active Galactic Nucleus Cores in Markarian 231, UGC 5101, and NGC 7469". The Astrophysical Journal 592 (2): 804–818. doi:10.1086/375778. Bibcode: 2003ApJ...592..804L. 
  15. ↑ "UGC 5101" (in en). 24 April 2008. https://esahubble.org/images/heic0810br/. 

External links



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