IRAS 17020+4544
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| IRAS 17020+4544 | |
|---|---|
 SDSS image of IRAS 17020+4544 | |
| Observation data (J2000 epoch) | |
| Constellation | Hercules |
| Right ascension | 17h 03m 30.38s[1] |
| Declination | +45° 40′ 47.16″[1] |
| Redshift | 0.060400[1] |
| Heliocentric radial velocity | 18,107 ± 90 km/s[1] |
| Distance | 886.0 ± 62.3 Mly (271.66 ± 19.11 Mpc)[1] |
| magnitude (J) | 12.87[1] |
| Characteristics | |
| Type | SBab;Sy1 Sy2[1] |
| Size | ~201,000 ly (61.5 kpc) (estimated)[1] |
| Other designations | |
| 2MASX J17033041+4540470, LEDA 97541, B3 1702+457, 6C JB170204.8+454510, LDOG 45, RBS 1623, RX J1703.5+4540[1] | |
IRAS 17020+4544 is a narrow-line Seyfert galaxy[2] located in the constellation of Hercules. The redshift of the galaxy is (z) 0.060[1] and it was first discovered by astronomers in October 1997 who discovered it contains high levels of polarization.[3] This object has been classified as radio-loud.[4]
IRAS 17020+4544 is categorized as an undisturbed spiral galaxy with an active galactic nucleus (AGN) that is depicted as being less powerful with a power of only 5 × 1044 erg s-1.[5][6] The total star formation rate of the galaxy is estimated to be 26 Mʘ per year and the central supermassive black hole is approximately 5.9 × 10 Mʘ. The optical spectrum of the nuclear region of the galaxy contains narrow emission lines that are described as H II regions. A companion dwarf galaxy is near IRAS 17020+4544, suggesting the interaction with it has caused the triggering of the latter's AGN.[6]
The radio structure of IRAS 17020+4544 is compact. When observed with the Very Long Baseline Array (VLBA), it has a core-jet structure morphology with a few jet components. The radio spectrum of the galaxy is characterized as steep, making it quite similar to studied compact steep spectrum (CSS) sources with a resolved radio core.[7] A further radio observation has detected the presence of an elongated jet structure located in the southwest direction with a measured length of 30 milliarcseconds.[8] Evidence also suggested the source is shown as elongated from east and west direction with the most compact component mainly surrounded by radio emission on two sides. The total flux density of the source is around 23 mJy.[9]
A study published in January 2021 reports detections of molecular gas in the galaxy being mainly distributed into a disc, with the molecular mass roughly estimated as 108 Mʘ.[6] There are detections of molecular outflows from the galaxy with the velocity roughly calculated as -660 kilometers per seconds. X-ray winds were also detected with an outflow velocity of 27,300 ± 30 kilometers per seconds.[10]
References
- 1 2 3 4 5 6 7 8 9 10 "NED Search results for IRAS 17020+4544". NASA/IPAC Extragalactic Database. Retrieved 2026-04-25.
- ↑ Komossa, Stefanie (1998). "Warm absorbers in Narrow-Line Seyfert 1 galaxies: IRAS 17020+4544 IRAS 13349+2438, PG 1404+226 and RX J0134-4258". Astronomische Gesellschaft Abstract Series. 14: 144. Bibcode:1998AGAb...14R.144K.
- ↑ Leighly, Karen M.; Kay, Laura E.; Wills, Beverley J.; Wills, D.; Grupe, Dirk (1997). "The Optical Polarization and Warm Absorber in IRAS 17020+4544". The Astrophysical Journal. 489 (2): L137–L140. arXiv:astro-ph/9709097. Bibcode:1997ApJ...489L.137L. doi:10.1086/316793. ISSN 0004-637X.
- ↑ Gonzalez, A G; Gallo, L C; Kosec, P; Fabian, A C; Alston, W N; Berton, M; Wilkins, D R (2020-06-18). "Characterizing continuum variability in the radio-loud narrow-line Seyfert 1 galaxy IRAS 17020+4544". Monthly Notices of the Royal Astronomical Society. 496 (3): 3708–3724. doi:10.1093/mnras/staa1735. ISSN 0035-8711.
- ↑ Longinotti, A. L.; Krongold, Y.; Guainazzi, M.; Giroletti, M.; Panessa, F.; Costantini, E.; Santos-Lleo, M.; Rodriguez-Pascual, P. (November 2015). "X-Ray High-resolution Spectroscopy Reveals Feedback in a Seyfert Galaxy from an Ultra-fast Wind with Complex Ionization and Velocity Structure". The Astrophysical Journal. 813 (2): L39. arXiv:1511.01165. Bibcode:2015ApJ...813L..39L. doi:10.1088/2041-8205/813/2/L39. ISSN 0004-637X.
- 1 2 3 Salomé, Q.; Longinotti, A. L.; Krongold, Y.; Feruglio, C.; Chavushyan, V.; Vega, O.; García-Burillo, S.; Fuente, A.; Olguín-Iglesias, A.; Patiño-Álvarez, V. M.; Puerari, I.; Robleto-Orús, A. (January 2021). "Evidence of galaxy interaction in the narrow-line Seyfert 1 galaxy IRAS 17020+4544 seen by NOEMA". Monthly Notices of the Royal Astronomical Society. 501 (1): 219–228. arXiv:2011.08762. Bibcode:2021MNRAS.501..219S. doi:10.1093/mnras/staa3626. ISSN 0035-8711.
- ↑ 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.
- ↑ 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.
- ↑ Giroletti, M.; Panessa, F.; Longinotti, A. L.; Krongold, Y.; Guainazzi, M.; Costantini, E.; Santos-Lleo, M. (2017-04-01). "Coexistence of a non-thermal jet and a complex ultra-fast X-ray outflow in a moderately luminous AGN" (PDF). Astronomy & Astrophysics. 600: A87. arXiv:1701.07298. Bibcode:2017A&A...600A..87G. doi:10.1051/0004-6361/201630161. ISSN 0004-6361.
- ↑ Longinotti, A. L.; Vega, O.; Krongold, Y.; Aretxaga, I.; Yun, M.; Chavushyan, V.; Feruglio, C.; Gómez-Ruiz, A.; Montaña, A.; León-Tavares, J.; Olguín-Iglesias, A.; Giroletti, M.; Guainazzi, M.; Kotilainen, J.; Panessa, F. (2018-10-29). "Early Science with the Large Millimeter Telescope: An Energy-driven Wind Revealed by Massive Molecular and Fast X-Ray Outflows in the Seyfert Galaxy IRAS 17020+4544". The Astrophysical Journal Letters. 867 (1): L11. arXiv:1810.01941. Bibcode:2018ApJ...867L..11L. doi:10.3847/2041-8213/aae5fd. ISSN 2041-8205.
External links
- IRAS 17020+4544 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
