RX J1633.3+4718
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| RX J1633.3+4718 | |
|---|---|
 The narrow-line Seyfert 1 galaxy RX J1633.3+4718 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Hercules |
| Right ascension | 16h 33m 23.580s |
| Declination | +47° 18′ 58.929″ |
| Redshift | 0.115761 |
| Heliocentric radial velocity | 34,704 km/s |
| Distance | 1.753 Gly (537.47 Mpc) |
| Apparent magnitude (V) | 17.35 |
| Apparent magnitude (B) | 17.77 |
| Characteristics | |
| Type | Sy 1 |
| Apparent size (V) | 87.63 kiloparsecs (285,800 light-years) (diameter; 2MASS K-band total isophote)[1] |
| Other designations | |
| LEDA 140641, RX J1633.3+4719, IRAS F16319+4725, EF B1631+4725, SDSS J163323.58+471858.9, RXS J16633+4718 | |
RX J1633.3+4718 (RX J1633+4718) known as RXS J16333+4718 according to VLBI Network observations,[2] is a narrow-line Seyfert 1 galaxy,[3][4] located in the constellation of Hercules. It has a redshift of (z) 0.116[5] and is located 1.75 billion light years from Earth.[1] The first known reference to this galaxy comes from a radio source which was identified in 1995 in the IRAS catalogue as F16319+4725.[6]
Description
[edit]RX J1633.3+4718 contains a radio loud active galactic nucleus (AGN) with a measured radio loudness parameter of R5 = fv(5 GHz)/fv(4400Å) > 100.[5] Furthermore, the AGN is hosted in a disk galaxy[7] found interacting with a starburst galaxy.[8] The two nuclei of both galaxies are about 8 kiloparsecs from each other.[9]
Two unique components are found in RX J1633.3+4718, mainly a core component and a north component. Both of the components are connected with the two galaxies in the interacting system, with measured flux densities of 24.48 mJy and 0.79 mJy.[9]
The core component is unresolved. It has an inverted radio spectrum whereas the spectral index is found steep.[9] The core component is suggested to be significantly variable, hinting at the presence of jet activity in RX J1633.3+4718. This is further confirmed by the jet's high brightness temperature of 1011.3 K[10] and parsec-scale core-jet radio morphology when seen in high resolution observations at 1.7 and 5 GHz respectively.[9][4] The north component on the other hand, is fainter and located at a position angle of 352°, away from the core by 3.8 arcsec.[11]
The accretion disk of RX J1633.3+4718 is shown to have ultrasoft excess X-ray emission. It is lower than 0.5 KeV with the temperature of the galaxy's disk estimated to be 40 electronvolts based on a disc model for soft excess. The mass of the black hole in RX J1633+4718 is estimated to be 3 x 106 Mʘ[8] while a bolometric luminosity of Lbol ≈ 1.51 x 1044 erg s-1 was derived from an unabsorbed flux measurement in a 0.001-100 KeV energy band.[5]
References
[edit]- ^ a b "By Name NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-10-25.
- ^ Gu, Minfeng (2018-07-27). "VLBI study of the jets in radio-loud narrow-line Seyfert 1 galaxies". Proceedings of Revisiting Narrow-line Seyfert 1 Galaxies and Their Place in the Universe — PoS(NLS1-2018). Trieste, Italy: Sissa Medialab: 025. arXiv:0704.3836. Bibcode:2018rnls.confE..25G. doi:10.22323/1.328.0025.
- ^ Wisotzki, L.; Bade, N. (1997-04-01). "Spectroscopy of narrow emission line X-ray galaxies". Astronomy and Astrophysics. 320: 395–398. Bibcode:1997A&A...320..395W. ISSN 0004-6361.
- ^ a b Doi, Akihiro; Asada, Keiichi; Nagai, Hiroshi (2011-08-18). "Very Long Baseline Array Imaging of Parsec-Scale Jet Structures in Radio-Loud Narrow-Line Seyfert 1 Galaxies". The Astrophysical Journal. 738 (2): 126. arXiv:1107.5117. Bibcode:2011ApJ...738..126D. doi:10.1088/0004-637x/738/2/126. ISSN 0004-637X.
- ^ a b c Mallick, Labani; Dewangan, G. C.; Gandhi, P.; Misra, R.; Kembhavi, A. K. (2016-05-06). "Accretion disc–corona and jet emission from the radio-loud narrow-line Seyfert 1 galaxy RX J1633.3+4719". Monthly Notices of the Royal Astronomical Society. 460 (2): 1705–1715. doi:10.1093/mnras/stw1073. ISSN 0035-8711.
- ^ Condon, J. J.; Anderson, E.; Broderick, J. J. (June 1995). "Radio Identifications of Extragalactic IRAS Sources". The Astronomical Journal. 109: 2318. Bibcode:1995AJ....109.2318C. doi:10.1086/117454. ISSN 0004-6256.
- ^ Olguín-Iglesias, Alejandro; Kotilainen, Jari; Chavushyan, Vahram (2019-12-23). "The disc-like host galaxies of radio-loud narrow-line Seyfert 1s". Monthly Notices of the Royal Astronomical Society. 492 (1): 1450–1464. doi:10.1093/mnras/stz3549. ISSN 0035-8711.
- ^ a b Yuan, W.; Liu, B. F.; Zhou, H.; Wang, T. G. (2010-10-12). "X-Ray Observational Signature of a Black Hole Accretion Disk in an Active Galactic Nucleus RX J1633+4718". The Astrophysical Journal. 723 (1): 508–513. arXiv:1009.2808. Bibcode:2010ApJ...723..508Y. doi:10.1088/0004-637x/723/1/508. ISSN 0004-637X.
- ^ a b c d Järvelä, E.; Dahale, R.; Crepaldi, L.; Berton, M.; Congiu, E.; Antonucci, R. (2022-01-25). "Unravelling the origin of extended radio emission in narrow-line Seyfert 1 galaxies with the JVLA". Astronomy & Astrophysics. 658: A12. arXiv:2109.07841. Bibcode:2022A&A...658A..12J. doi:10.1051/0004-6361/202141698. ISSN 0004-6361.
- ^ Gu, Minfeng; Chen, Yongjun (2010-05-11). "The Compact Radio Structure of Radio-Loud Narrow Line Seyfert 1 Galaxies". The Astronomical Journal. 139 (6): 2612–2619. arXiv:1004.3058. Bibcode:2010AJ....139.2612G. doi:10.1088/0004-6256/139/6/2612. ISSN 0004-6256.
- ^ Berton, M.; Congiu, E.; Järvelä, E.; Antonucci, R.; Kharb, P.; Lister, M. L.; Tarchi, A.; Caccianiga, A.; Chen, S.; Foschini, L.; Lähteenmäki, A.; Richards, J. L.; Ciroi, S.; Cracco, V.; Frezzato, M. (2018-06-01). "Radio-emitting narrow-line Seyfert 1 galaxies in the JVLA perspective". Astronomy & Astrophysics. 614: A87. arXiv:1801.03519. Bibcode:2018A&A...614A..87B. doi:10.1051/0004-6361/201832612. ISSN 0004-6361.
