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2MASX J09175344+5143379

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2MASX J09175344+5143379
2MASX J09175344+5143379 captured by SDSS
Observation data (J2000.0 epoch)
ConstellationUrsa Major
Right ascension09h 17m 53.43s
Declination+51d 43m 37.33s
Redshift0.216754
Heliocentric radial velocity64,981 km/s
Distance2.947 Gly (903.5 Mpc)
Group or clusterAbell 773
Apparent magnitude (V)0.040
Apparent magnitude (B)0.053
Surface brightness17.8
Characteristics
TypeBrCLG
Apparent size (V)0.24' x 0.20'
Notable featuresBrightest cluster galaxy
Other designations
OGC 267, PGC 2399018, 2MASS J09175345+5143373, 2XMM J091752.8+514339, SDSS J091753.41+514337.3

2MASX J09175344+5143379 also known as PGC 2399018, is a massive elliptical galaxy located in the constellation of Ursa Major. At the redshift of 0.216, the galaxy is located 2.9 billion light-years from Earth[1] and considered the brightest cluster galaxy (BCG) in the galaxy cluster, Abell 773.

Characteristics

2MASX J09175344+5143379 is classified a luminous galaxy with an r-band luminosity of L r > 8L*.[2] The galaxy is considered radio-loud, located in a specific location of the cluster environment with an X-ray luminosity of LX ≥ 5 × 1044 erg s−1.[3] 2MASX J09175344+5143379 also has central velocity dispersion between the range of α ~ 300–400 km s−1[4] or Dn4000 > 1.5 and within R200 according to calculations from velocity dispersion functions.[5]

It is also a line-emitting galaxy with [O III] 5007 Å line emission and contains a powerful radio source showing the presence of a strong core component. This might be caused by X-ray cavity power correlating with the extended and core radio emission, suggesting of steady fueling of the nucleus over bubble-rise that is observed in time scales.[6]

Like other elliptical galaxies of similar sizes, the light profile in 2MASX J09175344+5143379 is described by a de Vaucouleurs surface brightness law, μ(r) ɐ r1/4, over a large range in radius.[7] As a giant elliptical galaxy, it has extended stellar envelope of excess light over it, probably associated by the formation of the cluster.[8]

The galaxy is known to show recent signs of star formation in its region, suggesting it a starburst galaxy. It has a low central gas entropy displaying enhanced ultraviolet rays (38%) and mid-infrared emission (43%) from 8 to 160 μm, according to observations by Galaxy Evolution Explorer (GALEX), Spitzer Space Telescope, and Two Micron All Sky Survey (2MASS) assembling spectral energy distributions (SEDs) and colors for BCGs like 2MASX J09175344+5143379. Such of these high excesses is consistent with the star formation activity inside the BCG, appearing to be enabled by presence of high density, X-ray emitting intergalactic gas in the cluster core. This hot gas may provide the clues of enhanced ambient pressure and fuel to trigger star formation.[9] According to Spitzer Space Telescope observations, it is classified a luminous infrared galaxy with luminosity values of LIR>1011 Lsolar.[10]

Due to its colossal appearance, it is possible 2MASX J09175344+5143379 might have been formed from multiple galaxy mergers. As numerous galaxies of shapes and sizes collided together, the process of dynamical friction along with tidal forces redistribute the kinetic energy into random energy form, allowing these galaxies to combine into a single amorphous, triaxial system resembling 2MASX J09175344+5143379.[11] The stellar mass of the galaxy is also built as well, making it having a large galactic halo.[12]

The star formation rate of 2MASX J09175344+5143379 is estimated to be 1-150 M⊙ yr−1 according to infrared observations done by Spitzer and Herschel photometry. Researchers who found a correlation with cluster X-ray gas cooling time for cool-core clusters (gas cooling time <1 Gyr), suggested the star formation in 2MASX J09175344+5143379 is influenced by the cluster-scale cooling process with occurrence of the molecular gas tracing Hα emission, correlating together with its obscured star formation.[13]

Abell 773

The cluster where 2MASX J09175344+5143379 is residing, is found to be a rich X-ray and luminous galaxy cluster at z = 0.22. Observed through Ryle Telescope at 15 GHz, the cluster has a Sunyaev-Zel'dovich effect due to measurements in decrements in the cosmic microwave background radiation with values of -590 ± 116μ Jy beam−1. This indicates the decrement temperature is between the range of –790 and –990 μK.[14] According to observations from researchers, they found the velocity distribution of cluster galaxies shows two peaks at v 65000 and 67500 km s−1, which corresponds to velocities of the two dominant galaxies in Abell 773. The low velocity structure has a high velocity dispersion - σv = 800–1100 km s−1 intermediate velocity dispersion - σv∼ 500 km s−1 in the high velocity structure. These components are suggested to be two independent groups. Researchers estimate a cluster mass of about 1h^-1_70 of 6-11h^-1_70 M_⊙[15] and a mass accretion rate of M200 = 1015 h−1 M⊙ according to computer stimulations.[16]

Abell 773 has a gas entropy profile. Researchers studied intracluster medium entropy profiles in a sample of 47 galaxy clusters and groups, which was observed at ∼r500 with Chandra, XMM-Newton, and Suzaku. They found the gas entropy profiles are derived with Bayesian statistics showing the gas entropy profiles are consistent with simulation-predicted power-law profile. Apart from that, they also calculated the total feedback energy per particle and found it decreases from ∼10 keV at the center to zero at ∼0.35r200. These values are consistent with zero outside ∼0.35r200, implying there is an upper limit of the feedback efficiency of ∼0.02 for the supermassive black holes hosted in 2MASX J09175344+5143379.[17]

The radial variation of the intrinsic scatter in scaled density profile in Abell 773, is found to be a minimum of ∼20% at R ∼ [0.5−0.7] R500 and a value of ∼40% at R500 according to researchers.[18] They also found a radio halo in Abell 773 through using dynamical information from the X-ray data and studying distribution of galaxy clusters in the radio power-mass diagram. Through the results, they found the radio power correlates with the mass of its host cluster. Nevertheless, Abell 773 is a disturbed cluster exhibiting an apparent bimodality, with the emissivity of radio halo being ∼5 times larger compared to non-emission radio halos in relaxed clusters. Researchers found the fraction of radio halos drops from ∼70% in high-mass clusters to ∼35% in the lower mass systems in the sample and showed that this result is in good agreement with the expectations from turbulent re-acceleration models.[19]

Lensed galaxy in Abell 773

A galaxy has been found to be lensed during the Herschel Lensing Survey (HLS) of Abell 773. With a bright source and located at redshift 5.2429, it is found unusual as compared to other lensed sources discovered so far, because of its higher submm flux (~200 mJy at 500 μm) and the high redshift. Apart from that, the source has a far-infrared (FIR) luminosity of LFIR = 1.1 × 1014/μ L⊙, where μ is the magnification factor, of ~11, indicating the source originates from an ultraluminous infrared galaxy with a H2  mass is 5.8 × 1011/μ M⊙.[20]

References

  1. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-06-16.
  2. ^ Ogle, Patrick M.; Lanz, Lauranne; Appleton, Philip N.; Helou, George; Mazzarella, Joseph (2019-07-01). "A Catalog of the Most Optically Luminous Galaxies at z < 0.3: Super Spirals, Super Lenticulars, Super Post-mergers, and Giant Ellipticals". The Astrophysical Journal Supplement Series. 243: 14. doi:10.3847/1538-4365/ab21c3. ISSN 0067-0049.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  3. ^ Kale, R.; Venturi, T.; Cassano, R.; Giacintucci, S.; Bardelli, S.; Dallacasa, D.; Zucca, E. (2015-08-26). "Brightest cluster galaxies in the extended GMRT radio halo cluster sample". Astronomy & Astrophysics. 581: A23. doi:10.1051/0004-6361/201526341. ISSN 0004-6361.
  4. ^ Fisher, David; Illingworth, Garth; Franx, Marijn (1995-01-01). "Kinematics of 13 Brightest Cluster Galaxies". The Astrophysical Journal. 438: 539. doi:10.1086/175100. ISSN 0004-637X.
  5. ^ Sohn, Jubee; Fabricant, Daniel G.; Geller, Margaret J.; Hwang, Ho Seong; Diaferio, Antonaldo (2020-10-01). "The Velocity Dispersion Function for Quiescent Galaxies in Nine Strong-lensing Clusters". The Astrophysical Journal. 902: 17. doi:10.3847/1538-4357/abb23b. ISSN 0004-637X.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  6. ^ Hogan, M. T.; Edge, A. C.; Hlavacek-Larrondo, J.; Grainge, K. J. B.; Hamer, S. L.; Mahony, E. K.; Russell, H. R.; Fabian, A. C.; McNamara, B. R.; Wilman, R. J. (2015-10-01). "A comprehensive study of the radio properties of brightest cluster galaxies". Monthly Notices of the Royal Astronomical Society. 453: 1201–1222. doi:10.1093/mnras/stv1517. ISSN 0035-8711.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  7. ^ de Vaucouleurs, Gerard (1948-01-01). "Recherches sur les Nebuleuses Extragalactiques". Annales d'Astrophysique. 11: 247. ISSN 0365-0499.
  8. ^ Kormendy, John; Djorgovski, S. (1989-01-01). "Surface photometry and the structure of elliptical galaxies". Annual Review of Astronomy and Astrophysics. 27: 235–277. doi:10.1146/annurev.aa.27.090189.001315. ISSN 0066-4146.
  9. ^ Hoffer, Aaron S.; Donahue, Megan; Hicks, Amalia; Barthelemy, R. S. (2012-03-01). "Infrared and Ultraviolet Star Formation in Brightest Cluster Galaxies in the ACCEPT Sample". The Astrophysical Journal Supplement Series. 199: 23. doi:10.1088/0067-0049/199/1/23. ISSN 0067-0049.
  10. ^ Egami, E.; Misselt, K. A.; Rieke, G. H.; Wise, M. W.; Neugebauer, G.; Kneib, J. -P.; Le Floc'h, E.; Smith, G. P.; Blaylock, M.; Dole, H.; Frayer, D. T.; Huang, J. -S.; Krause, O.; Papovich, C.; Pérez-González, P. G. (2006-08-01). "Spitzer Observations of the Brightest Galaxies in X-Ray-Luminous Clusters". The Astrophysical Journal. 647: 922–933. doi:10.1086/504519. ISSN 0004-637X.
  11. ^ Barnes, Joshua E. (1988-08-01). "Encounters of Disk/Halo Galaxies". The Astrophysical Journal. 331: 699. doi:10.1086/166593. ISSN 0004-637X.
  12. ^ Inagaki, Takahiro; Lin, Yen-Ting; Huang, Hung-Jin; Hsieh, Bau-Ching; Sugiyama, Naoshi (2015-01-01). "Stellar mass assembly of brightest cluster galaxies at late times". Monthly Notices of the Royal Astronomical Society. 446: 1107–1114. doi:10.1093/mnras/stu2126. ISSN 0035-8711.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  13. ^ Rawle, T. D.; Edge, A. C.; Egami, E.; Rex, M.; Smith, G. P.; Altieri, B.; Fiedler, A.; Haines, C. P.; Pereira, M. J.; Pérez-González, P. G.; Portouw, J.; Valtchanov, I.; Walth, G.; van der Werf, P. P.; Zemcov, M. (2012-03-01). "The Relation between Cool Cluster Cores and Herschel-detected Star Formation in Brightest Cluster Galaxies". The Astrophysical Journal. 747: 29. doi:10.1088/0004-637X/747/1/29. ISSN 0004-637X.
  14. ^ Grainge, K.; Jones, M.; Pooley, G.; Saunders, R.; Edge, A. (1993-11-01). "Detection of the Sunyaev-Zel'dovich effect in Abell 773". Monthly Notices of the Royal Astronomical Society. 265 (1): L57–L58. doi:10.1093/mnras/265.1.l57. ISSN 0035-8711.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  15. ^ Barrena, R.; Boschin, W.; Girardi, M.; Spolaor, M. (2007-05-01). "Internal dynamics of the radio halo cluster Abell 773: a multiwavelength analysis". Astronomy and Astrophysics. 467: 37–48. doi:10.1051/0004-6361:20066511. ISSN 0004-6361.
  16. ^ Pizzardo, M.; Di Gioia, S.; Diaferio, A.; De Boni, C.; Serra, A. L.; Geller, M. J.; Sohn, J.; Rines, K.; Baldi, M. (2021-02-01). "Mass accretion rates of clusters of galaxies: CIRS and HeCS". Astronomy and Astrophysics. 646: A105. doi:10.1051/0004-6361/202038481. ISSN 0004-6361.
  17. ^ Zhu, Zhenghao; Xu, Haiguang; Hu, Dan; Shan, Chenxi; Zhu, Yongkai; Fan, Shida; Zhao, Yuanyuan; Gu, Liyi; Wu, Xiang-Ping (2021-02-01). "A Study of Gas Entropy Profiles of 47 Galaxy Clusters and Groups out to the Virial Radius". The Astrophysical Journal. 908: 17. doi:10.3847/1538-4357/abd327. ISSN 0004-637X.{{cite journal}}: CS1 maint: unflagged free DOI (link)
  18. ^ Pratt, G. W.; Arnaud, M.; Maughan, B. J.; Melin, J. -B. (2022-09-01). "Linking a universal gas density profile to the core-excised X-ray luminosity in galaxy clusters up to z ∼ 1.1". Astronomy and Astrophysics. 665: A24. doi:10.1051/0004-6361/202243074. ISSN 0004-6361.
  19. ^ Cuciti, V.; Cassano, R.; Brunetti, G.; Dallacasa, D.; de Gasperin, F.; Ettori, S.; Giacintucci, S.; Kale, R.; Pratt, G. W.; van Weeren, R. J.; Venturi, T. (2021-03-01). "Radio halos in a mass-selected sample of 75 galaxy clusters. II. Statistical analysis". Astronomy and Astrophysics. 647: A51. doi:10.1051/0004-6361/202039208. ISSN 0004-6361.
  20. ^ Combes, F.; Rex, M.; Rawle, T. D.; Egami, E.; Boone, F.; Smail, I.; Richard, J.; Ivison, R. J.; Gurwell, M.; Casey, C. M.; Omont, A.; Alba, A. Berciano; Dessauges-Zavadsky, M.; Edge, A. C.; Fazio, G. G. (2012-02-01). "A bright z = 5.2 lensed submillimeter galaxy in the field of Abell 773 - HLSJ091828.6+514223". Astronomy & Astrophysics. 538: L4. doi:10.1051/0004-6361/201118750. ISSN 0004-6361.
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