SDSS J080730.75+340041.6

SDSS J080730.75+340041.6
SDSS image of SDSS J080730.75+340041.6
Observation data (J2000.0 epoch)
ConstellationLynx
Right ascension08h 07m 30.77s[1]
Declination+34° 00′ 42.14″[1]
Redshift0.207863[1]
Heliocentric radial velocity62,316 ± 8 km/s[1]
Distance2,996.3 ± 209.8 Mly (918.67 ± 64.31 Mpc)[1]
Group or clusterWHL J080730.7+340042, FGS 4
magnitude (K)14.75[1]
Characteristics
TypeBrClG[1]
Size~780,000 ly (239.2 kpc) (estimated)[1]
Other designations
2MASX J08073078+3400419, BZU J0807+3400, GMBCG J121.87813+34.01156 BCG, LEDA 2042439, WHL J080730.7+340042 BCG, [YHW2016] J121.87811+34.01158, NVSS J080730+340042

SDSS J080730.75+340041.6 is a massive elliptical galaxy located in the constellation of Lynx. The redshift of the galaxy is (z) 0.207[1] and it was first discovered by astronomers from the ROSAT All-Sky Survey in April 2000.[2]

Description

SDSS J080730.75+340041.6 is an elliptical galaxy residing as the brightest cluster galaxy of the galaxy cluster WHL J080730.7+340042, with 13 confirmed galaxy member candidates. The R-band magnitude of the galaxy is 16.39 magnitude while the absolute magnitude is -24.05.[3][4]

The galaxy is categorized as a fossil galaxy belonging to a fossil system called FGS 4, with its X-ray luminosity estimated to be 4.210 × 1043 erg/s and a total velocity dispersion of 263 ± 21 kilometers per second. It has an effective surface brightness of 20.23 ± 0.39 magnitudes per square arcsecond and is orientated in a position angle of 73.4 ± 1.5°.[5][6] A study found it has a total star formation rate calculated to be 7.04 M☉ per year based on its doubly ionized oxygen emission line and 3.16 M☉ based on its hydrogen-alpha emission line. Its optical spectrum also contains singly ionized nitrogen and h-beta emission lines, with line fluxes of 327.36 × 10−17 erg s−1 cm−2 and 115.70 × 10−17 erg s−1 respectively.[7]

The nucleus is active and is categorized as both a blazar and a non-bent Fanaroff-Riley Class Type I radio galaxy.[8][9] Radio imaging made with the Very Large Array (VLA) at 1.4 GHz frequencies detected the presence of bipolar radio jets originating from the galaxy with the radio source extent estimated to be 6.9 arcseconds.[10] The radio flux density is 12.7 mJy at 1.4 GHz frequencies and the total radio power is 1.58 × 1024 WHz−1.[11]

References

  1. 1 2 3 4 5 6 7 8 9 "NED Search results for SDSS J080730.75+340041.6". NASA/IPAC Extragalactic Database. Retrieved 2026-06-19.
  2. ↑ Brinkmann, W.; Laurent-Muehleisen, S. A.; Voges, W.; Siebert, J. (April 2000). "Radio and X-ray bright AGN: the ROSAT - FIRST correlation". Astronomy and Astrophysics. 356: 445–462.
  3. ↑ Wen, Z. L.; Han, J. L.; Liu, F. S. (2012-03-30). "A Catalog of 132,684 Clusters of Galaxies Identified from Sloan Digital Sky Survey III". The Astrophysical Journal Supplement Series. 199 (2): 34. arXiv:1202.6424. doi:10.1088/0067-0049/199/2/34. ISSN 0067-0049.
  4. ↑ Santos, Walter A.; Mendes de Oliveira, Claudia; Sodré Jr., Laerte (2007-08-23). "Fossil Groups in the Sloan Digital Sky Survey". The Astronomical Journal. 134 (4): 1551–1559. arXiv:0708.1945. doi:10.1086/521341. ISSN 0004-6256.
  5. ↑ Zarattini, S.; Barrena, R.; Girardi, M.; Castro-Rodriguez, N.; Boschin, W.; Aguerri, J. a. L.; Méndez-Abreu, J.; Sánchez-Janssen, R.; Catalán-Torrecilla, C.; Corsini, E. M.; Burgo, C. del; D'Onghia, E.; Herrera-Ruiz, N.; Iglesias-Páramo, J.; Bailon, E. Jimenez (2014-05-01). "Fossil group origins - IV. Characterization of the sample and observational properties of fossil systems". Astronomy & Astrophysics. 565: A116. doi:10.1051/0004-6361/201323351. ISSN 0004-6361.
  6. ↑ Méndez-Abreu, J.; Aguerri, J. a. L.; Barrena, R.; Sánchez-Janssen, R.; Boschin, W.; Castro-Rodriguez, N.; Corsini, E. M.; Burgo, C. del; D'Onghia, E.; Girardi, M.; Iglesias-Páramo, J.; Napolitano, N.; Vilchez, J. M.; Zarattini, S. (2012-01-01). "Fossil group origins - II. Unveiling the formation of the brightest group galaxies through their scaling relations". Astronomy & Astrophysics. 537: A25. doi:10.1051/0004-6361/201117755. hdl:11577/2526350. ISSN 0004-6361.
  7. ↑ Liu, F. S.; Mao, Shude; Meng, X. M. (2012-06-11). "Star formation activities in early-type brightest cluster galaxies". Monthly Notices of the Royal Astronomical Society. 423 (1): 422–436. arXiv:1203.1840. doi:10.1111/j.1365-2966.2012.20886.x.
  8. ↑ Kundert, A.; Gastaldello, F.; D'Onghia, E.; Girardi, M.; Aguerri, J. A. L.; Barrena, R.; Corsini, E. M.; De Grandi, S.; Jiménez-Bailón, E.; Lozada-Muñoz, M.; Méndez-Abreu, J.; Sánchez-Janssen, R.; Wilcots, E.; Zarattini, S. (2015-09-18). "Fossil group origins – VI. Global X-ray scaling relations of fossil galaxy clusters". Monthly Notices of the Royal Astronomical Society. 454 (1): 161–176. arXiv:1503.06219. doi:10.1093/mnras/stv1879. ISSN 0035-8711.
  9. ↑ Ma, Zhixian; Xu, Haiguang; Zhu, Jie; Hu, Dan; Li, Weitian; Shan, Chenxi; Zhu, Zhenghao; Gu, Liyi; Li, Jinjin; Liu, Chengze; Wu, Xiangping (2019-02-01). "A Machine Learning Based Morphological Classification of 14,245 Radio AGNs Selected from the Best–Heckman Sample". The Astrophysical Journal Supplement Series. 240 (2): 34. arXiv:1812.07190. doi:10.3847/1538-4365/aaf9a2. ISSN 0067-0049.
  10. ↑ Hess, Kelley M.; Wilcots, Eric M.; Hartwick, Victoria L. (2012-07-06). "Fresh Activity in Old Systems: Radio AGN in Fossil Groups of Galaxies". The Astronomical Journal. 144 (2): 48. arXiv:1206.2679. doi:10.1088/0004-6256/144/2/48. ISSN 0004-6256.
  11. ↑ Yuan, Z. S.; Han, J. L.; Wen, Z. L. (2016-05-12). "Radio luminosity function of brightest cluster galaxies". Monthly Notices of the Royal Astronomical Society. 460 (4): 3669–3678. arXiv:1605.03387. doi:10.1093/mnras/stw1125. ISSN 0035-8711.
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