PKS 2225−308 is a radio galaxy located in the constellation of Piscis Austrinus. The redshift of the galaxy is (z) 0.058[1] and it was first discovered as an N galaxy from a survey by S.A. Grandi in August 1983.[2] The galaxy is known to host a radio source and also a member of the galaxy cluster Abell 3880, residing as the brightest cluster galaxy (BCG).[3][4]
| PKS 2225−308 | |
|---|---|
 Pan-STARRS image of PKS 2225−308 | |
| Observation data (J2000 epoch) | |
| Constellation | Piscis Austrinus |
| Right ascension | 22h 27m 54.47s[1] |
| Declination | −30° 34′ 31.69″[1] |
| Redshift | 0.058057[1] |
| Heliocentric radial velocity | 17,405 ± 35 km/s[1] |
| Distance | 839.0 ± 58.8 Mly (257.24 ± 18.02 Mpc)[1] |
| Group or cluster | Abell 3880 |
| magnitude (J) | 11.58[1] |
| Characteristics | |
| Type | cD;E+3;BrClG[1] |
| Size | ~597,000 ly (183.1 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J22275446−3034321, 2dFGRS S338Z021, Abell 3880:[AAV2011] BCG, PGC 68924, NVSS J222754−303431, PMN J2227−3033, SUMSS J222754−303431, WINGS J222754.43−303431.8[1] | |
Description
editPKS 2225−308 is classified as a Fanaroff-Riley Class Type 1 gamma-ray emitting radio galaxy with the total gamma-ray luminosity estimated to be 43.09 Lγ. The central supermassive black hole is estimated to be 9.40 Mʘ.[5][6] The host is classified to be a massive elliptical galaxy with the brightness profile best described by a de Vaucouleurs law model.[7][5]
The radio source of the galaxy is described as compact and is found to have a head-tail morphology.[8] The radio structure of the source is classified as a double with components that are shown as slightly extended.[9] There is also a radio core detected at parsec-scales, with the total flux density being estimated as 30 mJy based on radio observations made by Very Large Array (VLA) at 4.9 GHz frequencies.[7] At 10 GHz, the core flux density is estimated to be 21.1 ± 9.3 mJy.[10]
The total radio luminosity has been estimated as -0.08 × 1024 W Hz-1.[11] A study has also found presence of X-ray cavities with the cavity power being estimated as 73.4 ± 4.1 × 1042 erg s-1.[12] C-band and X-band imaging also found there is an extended structure shown on one side.[10]
References
edit- 1 2 3 4 5 6 7 8 9 10 "NED Search results for PKS 2225-308". NASA/IPAC Extragalactic Database. Retrieved 2026-04-26.
- ↑ Grandi, S. A. (August 1983). "Spectroscopic observations of southern N-galaxy candidates". Monthly Notices of the Royal Astronomical Society. 204 (3): 691–697. doi:10.1093/mnras/204.3.691. ISSN 0035-8711.
- ↑ Brown, David L.; Burns, Jack O. (December 1991). "Parkes Radio Sources in the Direction of Southern Rich Clusters". The Astronomical Journal. 102: 1917. Bibcode:1991AJ....102.1917B. doi:10.1086/116012. ISSN 0004-6256.
- ↑ Pulido, F. A.; McNamara, B. R.; Edge, A. C.; Hogan, M. T.; Vantyghem, A. N.; Russell, H. R.; Nulsen, P. E. J.; Babyk, I.; Salomé, P. (2018-02-01). "The Origin of Molecular Clouds in Central Galaxies". The Astrophysical Journal. 853 (2): 177. arXiv:1710.04664. Bibcode:2018ApJ...853..177P. doi:10.3847/1538-4357/aaa54b. ISSN 0004-637X.
- 1 2 Govoni, F.; Falomo, R.; Fasano, G.; Scarpa, R. (January 2000). "The optical properties of low redshift radio galaxies". Astronomy and Astrophysics. 353: 507–527. arXiv:astro-ph/9910469. Bibcode:2000A&A...353..507G. ISSN 0004-6361.
- ↑ Chen, Yongyun; Gu, Qiusheng; Fan, Junhui; Yu, Xiaoling; Ding, Nan; Xiong, Dingrong; Guo, Xiaotong (2023-04-01). "General Physical Properties of Gamma-Ray-emitting Radio Galaxies". The Astrophysical Journal Supplement Series. 265 (2): 60. arXiv:2304.05551. Bibcode:2023ApJS..265...60C. doi:10.3847/1538-4365/acc57f. ISSN 0067-0049.
- 1 2 Slee, O. B.; Sadler, E. M.; Reynolds, J. E.; Ekers, R. D. (August 1994). "Parsec-scale radio cores in early-type galaxies". Monthly Notices of the Royal Astronomical Society. 269 (4): 928–946. doi:10.1093/mnras/269.4.928. ISSN 0035-8711.
- ↑ Fasano, G.; Falomo, R.; Scarpa, R. (September 1996). "Optical surface photometry of radio galaxies - I. Observations and data analysis" (PDF). Monthly Notices of the Royal Astronomical Society. 282 (1): 40–66. doi:10.1093/mnras/282.1.40. ISSN 0035-8711.
- ↑ Jones, Paul A.; McAdam, W. B. (May 1992). "The Structure of Southern Extragalactic Radio Sources". The Astrophysical Journal Supplement Series. 80: 137. Bibcode:1992ApJS...80..137J. doi:10.1086/191662. ISSN 0067-0049.
- 1 2 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. (2015-10-21). "A Comprehensive Study of the Radio Properties of Brightest Cluster Galaxies". Monthly Notices of the Royal Astronomical Society. 453 (2): 1201–1222. arXiv:1507.03019. doi:10.1093/mnras/stv1517. ISSN 0035-8711.
- ↑ Fukazawa, Yasushi; Matake, Hiroto; Kayanoki, Taishu; Inoue, Yoshiyuki; Finke, Justin (2022-06-01). "High-energy Emission Component, Population, and Contribution to the Extragalactic Gamma-Ray Background of Gamma-Ray-emitting Radio Galaxies". The Astrophysical Journal. 931 (2): 138. arXiv:2204.14019. Bibcode:2022ApJ...931..138F. doi:10.3847/1538-4357/ac6acb. ISSN 0004-637X.
- ↑ Pulido, F. A.; McNamara, B. R.; Edge, A. C.; Hogan, M. T.; Vantyghem, A. N.; Russell, H. R.; Nulsen, P. E. J.; Babyk, I.; Salomé, P. (2018-02-01). "The Origin of Molecular Clouds in Central Galaxies". The Astrophysical Journal. 853 (2): 177. arXiv:1710.04664. Bibcode:2018ApJ...853..177P. doi:10.3847/1538-4357/aaa54b. ISSN 0004-637X.
External links
edit- PKS 2225−308 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images