Astronomy:NGC 3585
| NGC 3585 | |
|---|---|
 NGC 3585 by PanSTARRS | |
| Observation data (J2000 epoch) | |
| Constellation | Hydra |
| Right ascension | 11h 13m 17.1s[1] |
| Declination | −26° 45′ 17″[1] |
| Redshift | 0.004783 ± 0.000040 [1] |
| Helio radial velocity | 1,434 ± 12 km/s[1] |
| Distance | 56 ± 15 Mly (17.3 ± 4.5 Mpc)[1] |
| Apparent magnitude (V) | 9.9 [2] |
| Characteristics | |
| Type | E7/S0 [1] |
| Apparent size (V) | 4.7′ × 2.6′ |
| Other designations | |
| ESO 502- G 025, AM 1110-262, MCG -04-27-004, PGC 34160[1] | |
NGC 3585 is an elliptical or a lenticular galaxy located in the constellation Hydra. It is located at a distance of circa 60 million light-years from Earth, which, given its apparent dimensions, means that NGC 3585 is about 80,000 light years across. It was discovered by William Herschel on December 9, 1784.[3]
NGC 3585 features a red discy region in the core with a semi-major axis of circa 45 arcseconds, probably associated with diffuse dust. There are nearly 130 globular cluster candidates in the galaxy, with the total number of globular clusters estimated to be nearly 550. This number is quite low, but it is typical for field elliptical galaxies. Based on luminosity turnover of the globular clusters, it is suspected that there is a subpopulation of younger clusters.[4] The outer isophotes of the galaxy are asymmetrical, maybe due to a tidal disruption.[5]
In the centre of NGC 3585 lies a supermassive black hole whose mass is estimated to be 108.4 M☉ based on the tidal disruption rate[6] or 108.53 ± 0.122 M☉ based on the observation of the circumnuclear ring with very-long-baseline interferometry.[7] Based on observations by the Hubble Space Telescope to determine the stellar velocity dispersion at the core, the mass of the hole was estimated to be between 280 and 490 million M☉ by using the M–sigma relation.[8]
NGC 3585 is the most prominent member of a loose galaxy group known as the NGC 3585 group. Other members of the group are the spiral galaxies UGCA 226, ESO 502- G 016, and UGCA 230.[9][10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "NASA/IPAC Extragalactic Database". Results for NGC 3585. http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+3585.
- ↑ "Revised NGC Data for NGC 3585". http://spider.seds.org/ngc/revngcic.cgi?NGC3585.
- ↑ Seligman, Courtney. "NGC 3585". https://cseligman.com/text/atlas/ngc35a.htm#3585.
- ↑ Lane, R. R.; Salinas, R.; Richtler, T. (16 January 2013). "Isolated ellipticals and their globular cluster systems". Astronomy & Astrophysics 549: A148. doi:10.1051/0004-6361/201220231.
- ↑ Tal, Tomer; van Dokkum, Pieter G.; Nelan, Jenica; Bezanson, Rachel (1 November 2009). "The Frequence of Tidal Features Associated with Nearby Luminous Elliptical Galaxies from a Statistically Complete Sample". The Astronomical Journal 138 (5): 1417–1427. doi:10.1088/0004-6256/138/5/1417. Bibcode: 2009AJ....138.1417T.
- ↑ Stone, Nicholas C.; Metzger, Brian D. (1 January 2016). "Rates of stellar tidal disruption as probes of the supermassive black hole mass function". Monthly Notices of the Royal Astronomical Society 455 (1): 859–883. doi:10.1093/mnras/stv2281. Bibcode: 2016MNRAS.455..859S.
- ↑ Johannsen, Tim; Psaltis, Dimitrios; Gillessen, Stefan; Marrone, Daniel P.; Özel, Feryal; Doeleman, Sheperd S.; Fish, Vincent L. (10 October 2012). "Masses of Nearby Supermassive Black Holes with Very Long Baseline Interferometry". The Astrophysical Journal 758 (1): 30. doi:10.1088/0004-637X/758/1/30. Bibcode: 2012ApJ...758...30J.
- ↑ Gültekin, Kayhan; Richstone, Douglas O.; Gebhardt, Karl; Lauer, Tod R.; Pinkney, Jason; Aller, M. C.; Bender, Ralf; Dressler, Alan et al. (20 April 2009). "A Quintet of Black Hole Mass Determinations". The Astrophysical Journal 695 (2): 1577–1590. doi:10.1088/0004-637X/695/2/1577. Bibcode: 2009ApJ...695.1577G.
- ↑ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society 412 (4): 2498–2520. doi:10.1111/j.1365-2966.2010.18071.x. Bibcode: 2011MNRAS.412.2498M. http://www.sao.ru/hq/dim/groups/galaxies.dat. Retrieved 3 January 2019.
- ↑ Garcia, A. M. (1993). "General study of group membership. II – Determination of nearby groups". Astronomy and Astrophysics Supplement Series 100 (1): 47–90. ISSN 0365-0138. Bibcode: 1993A&AS..100...47G. http://cdsarc.u-strasbg.fr/ftp/J/A+AS/100/47/table2.dat.
External links
- NGC 3585 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NGC 3585 on SIMBAD
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