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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	16 33 23.580
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)
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, is a narrow-line Seyfert 1 galaxy, located in the constellation of Hercules. It has a redshift of (z) 0.116 and is located 1.75 billion light years from Earth. The first known reference to this galaxy comes from a radio source which was identified in 1995 in the IRAS catalogue as F16319+4725.

Description

RX J1633.3+4718 contains a radio loud active galactic nucleus (AGN) with a measured radio loudness parameter of R₅ = f_v(5 GHz)/f_v(4400Å) > 100. Furthermore, the AGN is hosted in a disk galaxy found interacting with a starburst galaxy. The two nuclei of both galaxies are about 8 kiloparsecs from each other.

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.

The core component is unresolved. It has an inverted radio spectrum whereas the spectral index is found steep. 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 10 K and parsec-scale core-jet radio morphology when seen in high resolution observations at 1.7 and 5 GHz respectively. 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.

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 10 M_ʘ while a bolometric luminosity of L_bol ≈ 1.51 x 10 erg s was derived from an unabsorbed flux measurement in a 0.001-100 KeV energy band.

References

1. ^ "By Name NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-10-25.
2. 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.
3. 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.
4. ^ 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.
5. ^ 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. arXiv:1604.03320. doi:10.1093/mnras/stw1073. ISSN 0035-8711.
6. 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.
7. 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. arXiv:1912.02746. doi:10.1093/mnras/stz3549. ISSN 0035-8711.
8. ^ 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.
9. ^ 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.
10. 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.
11. 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.

External links

• RX J1633.3+4718 on SIMBAD

v t e Constellation of Hercules
Hercules–Corona Borealis Great Wall Hercules in Chinese astronomy List of stars in Hercules
Stars	Bayer α (Rasalgethi) β (Kornephoros) γ δ (Sarin) ε ζ η θ ι κ (Marsic) λ (Maasym) μ ν ξ ο π ρ σ τ υ φ χ ψ ψ ω (Cujam) Flamsteed 14 29 (h) 30 (g) 42 45 (l) 52 60 68 (u) 69 (e) 72 (w) 89 93 98 99 (b) 102 104 (A) 106 109 110 111 112 32 Oph Variable X AC AM BL DI DQ V446 V533 V772 V777 V838 V1674 HR 6669 6697 6806 HD 146389 (Irena) 147506 (Hunor) 149026 (Ogma) 152843 154345 155358 156668 159062 164595 164922 Other BD +17° 3248 Furuhjelm 46 GD 362 Gliese 623 Gliese 638 Gliese 649 Gliese 686 GJ 3991 HAT-P-14 (Franz) HAT-P-18 HAT-P-67 Hercules X-1 GSC 02620-00648 Ross 640 TOI-2119 TrES-3 (Pipoltr) TYC 1031-1262-1 WASP-103 WISE 1738+2732 WISE 1741+2553
Exoplanets 14 Herculis b c HAT-P-14b (Sissi) HD 149026 b (Smertrios) HD 164922 b c WASP-103b
Star clusters Messier 13 Messier 92 NGC 6229 Palomar 14
Nebulae Abell 39 NGC 6210
Galaxies	NGC 6028 6039 6040 6041 6042 6043 6044 6045 6046 6047 6052 6053 6054 6055 6056 6057 6061 6078 6158 6166 6181 6207 6212 6239 6261 6263 6308 6452 6560 Other 1ES 1741+196 2MASX J16270254+4328340 3C 345 3C 346 A2261-BCG Arp 272 (NGC 6050 and IC 1179) AT2018cow IC 1182 IC 1189 Hercules Dwarf Hercules A IC 1192 IC 4617 Markarian 501 MCG+07-33-027 PGC 2046648 QSR J1819+3845 RX J1633.3+4718 UGC 11105
Galaxy clusters Abell 2152 Abell 2199 Hercules Cluster Hercules Superclusters Zwicky's Triplet
Astronomical events LBG-2377
Category

• Seyfert galaxies
• Active galaxies
• Hercules (constellation)
• LEDA objects
• IRAS catalogue objects
• Interacting galaxies