Astronomy:UGC 9128
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Short description: Galaxy in the constellation Boötes
| UGC 9128 | |
|---|---|
 UGC 9128 | |
| Observation data (J2000 epoch) | |
| Constellation | Boötes |
| Right ascension | 14h 15m 56.70s[1] |
| Declination | 23° 03′ 16.2″[1] |
| Distance | 6.8–7.8 Mly (2.1–2.4 Mpc)[2][3] |
| Characteristics | |
| Type | dIrr[4] |
| Mass | (1.3±0.2)×107 [3] M☉ |
| Size | 3300 ly[5] |
| Other designations | |
| UGC 9128, DDO 187[6] | |
UGC 9128 is a dwarf irregular galaxy around 6.8–7.8 Mly (2.1–2.4 Mpc) away; it is thought to be in the Local Group, although its membership is not certain.[2][3] The galaxy has a mass of about (1.3±0.2)×107 M☉, around 100 million stars, and a diameter of around 3300 ly.[3][5] It is therefore quite faint, and so was only discovered in the 20th century.[2]
UGC 9128 is around 2.7 Mly from GR 8, which is its nearest neighbour.[6]
UGC 9128 is a starburst galaxy, with the peak of star formation being 20–100 million years ago.[3][6] It is thought to have both a halo and disc.[6]
References
- ↑ 1.0 1.1 Cotton, W. D.; Condon, J. J.; Arbizzani, E. (1999). "Arcsecond Positions of UGC Galaxies". The Astrophysical Journal Supplement Series 125 (2): 409–412. doi:10.1086/313286. Bibcode: 1999ApJS..125..409C.
- ↑ 2.0 2.1 2.2 "Dwarf galaxy: small but perfectly formed" (in en). https://esahubble.org/images/potw1117a/.
- ↑ 3.0 3.1 3.2 3.3 3.4 "Dynamics of starbursting dwarf galaxies". https://www.aanda.org/articles/aa/pdf/2014/06/aa22657-13.pdf.
- ↑ McConnachie, Alan W. (2012-06-05). "The Observed Properties of Dwarf Galaxies in and Around the Local Group" (in en). The Astronomical Journal 144 (1): 4. doi:10.1088/0004-6256/144/1/4. ISSN 0004-6256. Bibcode: 2012AJ....144....4M.
- ↑ 5.0 5.1 Plait, Phil (25 April 2011). "And the cottonball galaxies shall inherit the Universe" (in en). https://slate.com/technology/2011/04/and-the-cottonball-galaxies-shall-inherit-the-universe.html.
- ↑ 6.0 6.1 6.2 6.3 Aparicio, A.; Tikhonov, N.; Karachentsev, I. (1999). Aparicio, Tikhonov, & Karachentsev, DDO 187. doi:10.1086/301157. https://iopscience.iop.org/article/10.1086/301157/fulltext/990200.text.html. Retrieved 8 August 2021.
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