SDSS J104902.07+542348.9

SDSS J104902.07+542348.9
SDSS image of SDSS J104902.07+542348.9
Observation data (J2000.0 epoch)
ConstellationUrsa Major
Right ascension10h 49m 02.06s[1]
Declination+54° 23′ 49.20″[1]
Redshift0.249140[1]
Heliocentric radial velocity74,690 ± 15 km/s[1]
Distance3,601.5 ± 252.1 Mly (1,104.23 ± 77.30 Mpc)[1]
Group or clusterWHL J104902.1+542349
magnitude (J)15.19[1]
Characteristics
TypeBrClG AGN[1]
Size~651,000 ly (199.6 kpc) (estimated)[1]
Other designations
2MASX J10490201+5423483, 7C 1045+5439, [BKH2005] 0906-004, LEDA 2468439, [LHC2018] J162.25867+54.39699, NVSS J104902+542348, [YCH2015] J162.2586+54.3969, WHL J104902.1+542349 BCG[1]

SDSS J104902.07+542348.9 also known as [LHC2018] J162.25867+54.39699, is a radio galaxy located in the constellation of Ursa Major. The redshift of the galaxy is estimated to be (z) 0.249.[1]

Description

SDSS J104902.07+542348.9 is an elliptical galaxy in stages of a gravitational interaction with another galaxy.[2] It is also the brightest cluster galaxy of the WHL J104902.1+542349 galaxy cluster with 15 confirmed galaxy members. The R-band magnitude of the galaxy has been calculated to be 16.94 magnitude while its absolute magnitude is -23.63.[3][4][5]

The nucleus is found to be active and it has been categorized as a non-bent compact radio galaxy with its total flux density estimated to be 16.40 mJy by NRAO VLA Sky Survey (NVSS).[6] The radio source morphology is mainly elongated, described as a single elliptical profile component although radio imaging made with NVSS suggested the radio emission is blended together with other radio sources. A radio core is detected and it has a core flux density of 12.80 mJy while the radio emission has the same flux density as the core.[2] The total radio flux density at 1.4 GHz is 16.4 mJy while the total radio power is 3.10 × 1024 WHz−1.[5]

A study has found the stellar mass of the galaxy is 11.33 M☉. The log radio luminosity is 24.47 W Hz−1 whereas the rest frame r0.1 magnitude is -22.74 with further evidence that the central AGN (active galactic nucleus) is powering the source.[7] The infrared J-band and H-band magnitudes of the galaxy are estimated to be 16.19 and 15.34 respectively while the W3 band magnitude is 11.98.[8]

References

  1. 1 2 3 4 5 6 7 8 9 10 "NED Search results for SDSS J104902.07+542348.9". NASA/IPAC Extragalactic Database. Retrieved 2026-07-18.
  2. 1 2 Kozieł-Wierzbowska, Dorota; Goyal, Arti; Żywucka, Natalia (2020-03-23). "Radio Sources Associated with Optical Galaxies and Having Unresolved or Extended Morphologies (ROGUE). I. A Catalog of SDSS Galaxies with FIRST Core Identifications". The Astrophysical Journal Supplement Series. 247 (2): 53. arXiv:1912.09959. Bibcode:2020ApJS..247...53K. doi:10.3847/1538-4365/ab63d3. ISSN 0067-0049.
  3. ↑ Wen, Z. L.; Han, J. L. (2015-07-09). "Calibration of the Optical Mass Proxy for Clusters of Galaxies and an Update of the Whl12 Cluster Catalog". The Astrophysical Journal. 807 (2): 178. arXiv:1506.04503. Bibcode:2015ApJ...807..178W. doi:10.1088/0004-637x/807/2/178. ISSN 1538-4357.
  4. ↑ 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. Bibcode:2012ApJS..199...34W. doi:10.1088/0067-0049/199/2/34. ISSN 0067-0049.
  5. 1 2 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.
  6. ↑ 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. Bibcode:2019ApJS..240...34M. doi:10.3847/1538-4365/aaf9a2. ISSN 0067-0049.
  7. ↑ Lin, Yen-Ting; Huang, Hung-Jin; Chen, Yen-Chi (2018-04-10). "An Analysis Framework for Understanding the Origin of Nuclear Activity in Low-power Radio Galaxies". The Astronomical Journal. 155 (5): 188. arXiv:1803.02482. Bibcode:2018AJ....155..188L. doi:10.3847/1538-3881/aab5b4. ISSN 0004-6256.
  8. ↑ Yang, Xiao-hong; Chen, Pei-sheng; Huang, Yan (2015-04-08). "Infrared colour properties of nearby radio-luminous galaxies". Monthly Notices of the Royal Astronomical Society. 449 (3): 3191–3201. arXiv:1502.05800. doi:10.1093/mnras/stv460. ISSN 1365-2966.
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