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IERS B2352+495

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IERS B2352+495
The radio galaxy IERS B2352+495.
Observation data (J2000.0 epoch)
ConstellationCassiopeia
Right ascension23h 55m 09.458s[1]
Declination+49° 50′ 08.33″[1]
Redshift0.237900[1]
Heliocentric radial velocity71,321 km/s[1]
Distance2.711 Gly
Apparent magnitude (B)21.10
Characteristics
TypeAGN2[1]
Notable featuresCompact symmetrical object
Other designations
NVSS J235509+495008, DA 611, OZ +488, TXS 2352+495, ICRF J235509.4+495008, 2352+495[1]

IERS B2352+495 is a radio galaxy located 2.7 billion light-years[1] in the constellation of Cassiopeia. Its redshift is (z) 0.237.[2][3] It was first discovered as a radio source displaying a flat radio spectra by astronomers in 1978 and subsequently identified with its counterpart in 1979.[4][5]

Description

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IERS B2352+495 is hosted by an elliptical galaxy. It is described as an example of a prototype compact symmetrical object with a radio luminosity of 4.8 x 1043 h−2 erg s−1.[6][7][8] It is a Gigahertz peaked spectrum source.[9][10] The galaxy shows weak variability on timescales and low polarization of 0.2% to 0.7%.[11][12] The central supermassive black hole mass for this galaxy is estimated to be 1.58 x 108 Mʘ.[13]

The radio structure of IERS B2352+495 is found to be symmetrical, according to P.N. Wilkinson who identified it showing two mini-lobes in the outer part.[14] It is a triple source; mainly made up of a compact component, a much weaker but large component and a middle component that is split into two other subcomponents.[15] When shown at multi-epoch observations by Very Long Baseline Array, it has hotspots and a radio core.[16] The hotspots show no evidence of superluminal motion.[15] Imaging observations at milliarcseconds showed the source contains multiple components, with most of its flux contained inside two of its components in the core region.[17] A narrow radio jet can be en seen south of the component, possibly disrupted by an interstellar material encounter.[18]

An investigation showed the hotspot components of IERS B2352+495 as well separated. Based from observations these components are estimated to have angular separations of 21.06 ± 2.70 per year which in turn, corresponds to a velocity separation of 0.20 ± 0.02 per hour.[19] These hotspots also have estimated pressure masses of 2 x 1011 Mʘ.[8] H I absorption has been discovered towards the galaxy with the spectrum displaying broad and narrow components redshifted by 129.9 ± 0.8 kilometers per seconds.[6]

In August 1994, IERS B2352+495 displayed an extreme scattering event. Based from observations the galactic foreground of the source is shown to be coincident with the galactic continuum, without signs of a shell-like structure.[20]

References

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  1. ^ a b c d e f g "Results for IERS B2352+495". NASA/IPAC Extragalactic Database. Retrieved 2025-04-27.
  2. ^ Curran, S. J.; Whiting, M. T.; Murphy, M. T.; Webb, J. K.; Bignell, C.; Polatidis, A. G.; Wiklind, T.; Francis, P.; Langston, G. (2011-05-11). "Redshifted H i and OH absorption in radio galaxies and quasars". Monthly Notices of the Royal Astronomical Society. 413 (2): 1165–1173. arXiv:1012.1972. doi:10.1111/j.1365-2966.2011.18209.x. ISSN 0035-8711.
  3. ^ de Vries, W. H.; O'Dea, C. P.; Perlman, E.; Baum, S. A.; Lehnert, M. D.; Stocke, J.; Rector, T.; Elston, R. (1998-08-10). "Near‐Infrared Imaging of Gigahertz Peaked Spectrum, Compact Steep Spectrum, and Large‐Scale FR II Radio Galaxies". The Astrophysical Journal. 503 (1): 138–155. doi:10.1086/305962. ISSN 0004-637X.
  4. ^ Owen, F. N.; Porcas, R. W.; Mufson, S. L.; Moffett, T. J. (July 1978). "Observations of radio sources with flat spectra". The Astronomical Journal. 83: 685–696. doi:10.1086/112253. ISSN 0004-6256.
  5. ^ Kapahi, V. K. (April 1979). "Westerbork observations of flat spectrum galaxies in the 5 GHz "S4" survey". Astronomy and Astrophysics. 74: L11 – L14. ISSN 0004-6361.
  6. ^ a b Araya, E. D.; Rodríguez, C.; Pihlström, Y.; Taylor, G. B.; Tremblay, S.; Vermeulen, R. C. (2009-11-18). "VLBA OBSERVATIONS OF H I IN THE ARCHETYPE COMPACT SYMMETRIC OBJECT B2352+495". The Astronomical Journal. 139 (1): 17–26. arXiv:0910.5035. doi:10.1088/0004-6256/139/1/17. ISSN 0004-6256.
  7. ^ Readhead, A. C. S.; Taylor, G. B.; Pearson, T. J.; Wilkinson, P. N. (April 1996). "Compact Symmetric Objects and the Evolution of Powerful Extragalactic Radio Sources". The Astrophysical Journal. 460: 634. doi:10.1086/176997. ISSN 0004-637X. Archived from the original on 2022-06-10.
  8. ^ a b Readhead, A. C. S.; Taylor, G. B.; Xu, W.; Pearson, T. J.; Wilkinson, P. N.; Polatidis, A. G. (April 1996). "The Statistics and Ages of Compact Symmetric Objects". The Astrophysical Journal. 460: 612. doi:10.1086/176996. ISSN 0004-637X.
  9. ^ O’Dea, Christopher P.; De Vries, Willem H.; Worrall, D. M.; Baum, Stefi A.; Koekemoer, Anton (2000-02-01). "ASCA Observations of the Gigahertz-peaked Spectrum Radio Galaxies 1345+125 and 2352+495". The Astronomical Journal. 119 (2): 478–485. doi:10.1086/301209. ISSN 0004-6256.
  10. ^ O'Dea, Christopher P.; Worrall, D. M.; Baum, Stefi A.; Stanghellini, Carlo (January 1996). "A ROSAT Search for Clusters Around Three Powerful Radio Galaxies at Redshifts 0.1~<z~<0.25". The Astronomical Journal. 111: 92. doi:10.1086/117763. ISSN 0004-6256. Archived from the original on 2024-09-03.
  11. ^ Pearson, T. J.; Readhead, A. C. S. (May 1988). "The milliarcsecond structure of a complete sample of radio sources. II - First-epoch maps at 5 GHz". The Astrophysical Journal. 328: 114. doi:10.1086/166274. ISSN 0004-637X.
  12. ^ Ostorero, L.; Moderski, R.; Stawarz, Ł.; Diaferio, A.; Kowalska, I.; Cheung, C. C.; Kataoka, J.; Begelman, M. C.; Wagner, S. J. (2010-05-06). "X-RAY-EMITTING GHz-PEAKED-SPECTRUM GALAXIES: TESTING A DYNAMICAL-RADIATIVE MODEL WITH BROADBAND SPECTRA". The Astrophysical Journal. 715 (2): 1071–1093. arXiv:0910.3611. doi:10.1088/0004-637x/715/2/1071. ISSN 0004-637X.
  13. ^ Wu, Qingwen (2009-10-01). "The black hole mass, Eddington ratio and MBH–σ[O iii] relation in young radio galaxies". Monthly Notices of the Royal Astronomical Society. 398 (4): 1905–1914. arXiv:0905.3663. doi:10.1111/j.1365-2966.2009.15127.x. ISSN 0035-8711.
  14. ^ Wilkinson, P. N.; Polatidis, A. G.; Readhead, A. C. S.; Xu, W.; Pearson, T. J. (September 1994). "Two-sided ejection in powerful radio sources: The compact symmetric objects". The Astrophysical Journal. 432: L87. doi:10.1086/187518. ISSN 0004-637X.
  15. ^ a b Conway, J. E.; Pearson, T. J.; Readhead, A. C. S.; Unwin, S. C.; Xu, W.; Mutel, R. L. (September 1992). "The Compact Triples 0710+439 and 2352+495: A New Morphology of Radio Galaxy Nuclei". The Astrophysical Journal. 396: 62. doi:10.1086/171697. ISSN 0004-637X.
  16. ^ Taylor, G. B.; Marr, J. M.; Pearson, T. J.; Readhead, A. C. S. (September 2000). "Kinematic Age Estimates for Four Compact Symmetric Objects from the Pearson-Readhead Survey". The Astrophysical Journal. 541 (1): 112–119. doi:10.1086/309428. ISSN 0004-637X.
  17. ^ Fey, Alan L.; Clegg, Andrew W.; Fiedler, Ralph L. (September 1996). "VLBI Observations of Eight Extreme Scattering Event Sources: Milliarcsecond-Scale Structure". The Astrophysical Journal. 468: 543. doi:10.1086/177713. ISSN 0004-637X.
  18. ^ Taylor, G. B.; Readhead, A. C. S.; Pearson, T. J. (May 1996). "Pinpointing the Center of Activity in Compact Symmetric Objects. I. Sources from the Pearson-Readhead Survey". The Astrophysical Journal. 463: 95. doi:10.1086/177225. ISSN 0004-637X.
  19. ^ Owsianik, I; Conway, J.E; Polatidis, A.G (November 1999). "The youngest lobe-dominated radio sources". New Astronomy Reviews. 43 (8–10): 669–673. arXiv:astro-ph/9907120. doi:10.1016/S1387-6473(99)00075-5. ISSN 1387-6473. Archived from the original on 2024-03-27.
  20. ^ Fiedler, R.; Pauls, T.; Johnston, K. J.; Dennison, B. (August 1994). "Galactic structures associated with extreme scattering events in the radio light curves of NRAO 140, 0954+658, and 2352+495". The Astrophysical Journal. 430: 595. doi:10.1086/174433. ISSN 0004-637X.
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