Astronomy:NGC 3599
| NGC 3599 | |
|---|---|
 NGC 3599 by Sloan Digital Sky Survey | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 15m 26.949s[1] |
| Declination | +18° 06′ 37.43″[1] |
| Redshift | 0.00277[2] |
| Helio radial velocity | 876±18 km/s[3] |
| Distance (comoving) | 0 ± 0 Mly (000 ± 00 Mpc)h−10.73 |
| Distance | 67 Mly (20.4 Mpc)[4] |
| Apparent magnitude (V) | 10.178 |
| Characteristics | |
| Type | SA0:[4] |
| Other designations | |
| NGC 3599, UGC 6281, MCG+03-29-015, PGC 34326[5] | |
NGC 3599 is a lenticular galaxy located in the constellation Leo. It was discovered by William Herschel on March 14, 1784.[6] The galaxy is located at a distance of 67 million light-years (20.4 Mpc) from the Sun.[4] NGC 3599 is a member of the Leo II group of galaxies[4] in the Virgocentric flow.[7]
The morphological classification of NGC 3599 is SA0:,[4] which indicates this is a lenticular galaxy but with some uncertainty in the classification. There is a weak ring structure 45″ to 71″ from the nucleus, and a small bar about 11″ in length.[8] The galaxy is inclined at an angle of 28° to the plane of the sky,[4] so it is being viewed from nearly face-on. The nucleus is compact and not associated with any non-thermal activity.[4] Although not optically active, NGC 3599 is classified as a Seyfert 2 or a LINER-type galaxy.[9] The mass of the central black hole is estimated at (1.3±0.6)×106 M☉.[4]
In 2003, a sudden rise in X-ray emission from NGC 3599 was observed by the XMM-Newton space observatory. Follow-up observations showed a rapid decay in flux during the following years. This was originally suggested as a candidate tidal disruption event but it may instead have been caused by thermal instability of the accretion disk orbiting a black hole.[9]
References
- ↑ 1.0 1.1 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ Gavazzi, Giuseppe et al. (October 2011). "The complete census of optically selected AGNs in the Coma Supercluster: the dependence of AGN activity on the local environment". Astronomy & Astrophysics 534: A31. doi:10.1051/0004-6361/201117461. ISSN 0004-6361. Bibcode: 2011A&A...534A..31G.
- ↑ Ogando, Ricardo L. C. et al. (June 2008). "Line Strengths of Early-Type Galaxies". The Astronomical Journal 135 (6): 2424–2445. doi:10.1088/0004-6256/135/6/2424. Bibcode: 2008AJ....135.2424O.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Sil'Chenko, O. K. et al. (2010). "Lenticular Galaxies at the Outskirts of the Leo Ii Group: NGC 3599 and NGC 3626". The Astronomical Journal 140 (5): 1462–1474. doi:10.1088/0004-6256/140/5/1462. Bibcode: 2010AJ....140.1462S.
- ↑ "NGC 3599". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+3599.
- ↑ Seligman, Courtney. "New General Catalog Objects: NGC 3500 - 3549". Celestial Atlas. https://cseligman.com/text/atlas/ngc35a.htm#3599.
- ↑ Esquej, P. et al. (October 2008). "Evolution of tidal disruption candidates discovered by XMM-Newton". Astronomy and Astrophysics 489 (2): 543–554. doi:10.1051/0004-6361:200810110. Bibcode: 2008A&A...489..543E.
- ↑ Gutiérrez, Leonel et al. (November 2011). "The Outer Disks of Early-type Galaxies. II. Surface-brightness Profiles of Unbarred Galaxies and Trends with Hubble Type". The Astronomical Journal 142 (5): id. 145. doi:10.1088/0004-6256/142/5/145. Bibcode: 2011AJ....142..145G.
- ↑ 9.0 9.1 Saxton, R. D. et al. (December 2015). "Was the soft X-ray flare in NGC 3599 due to an AGN disc instability or a delayed tidal disruption event?". Monthly Notices of the Royal Astronomical Society 454 (3): 2798–2803. doi:10.1093/mnras/stv2160. Bibcode: 2015MNRAS.454.2798S.
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