| 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],PGC 50961 | |
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
- ^ a b Cotton, W. D.; Condon, J. J.; Arbizzani, E. (1999). "Arcsecond Positions of UGC Galaxies". The Astrophysical Journal Supplement Series. 125 (2): 409–412. Bibcode: 1999ApJS..125..409C. doi: 10.1086/313286. S2CID 122517686.
- ^ a b c "Dwarf galaxy: small but perfectly formed". www.spacetelescope.org. Retrieved 8 August 2021.
- ^ a b c d e "Dynamics of starbursting dwarf galaxies" (PDF). Retrieved 8 August 2021.
- ^ McConnachie, Alan W. (2012-06-05). "The Observed Properties of Dwarf Galaxies in and Around the Local Group". The Astronomical Journal. 144 (1): 4. arXiv: 1204.1562. Bibcode: 2012AJ....144....4M. doi: 10.1088/0004-6256/144/1/4. ISSN 0004-6256. S2CID 118515618.
- ^ a b Plait, Phil (25 April 2011). "And the cottonball galaxies shall inherit the Universe". Slate Magazine. Retrieved 8 August 2021.
- ^
a
b
c
d Aparicio, A.; Tikhonov, N.; Karachentsev, I. (1999).
"Aparicio, Tikhonov, & Karachentsev, DDO 187".
arXiv:
astro-ph/9909493.
doi:
10.1086/301157.
S2CID
15309075. Retrieved 8 August 2021.
{{ cite journal}}: Cite journal requires|journal=( help)
 | This galaxy-related article is a stub. You can help Wikipedia by expanding it. |
| 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],PGC 50961 | |
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
- ^ a b Cotton, W. D.; Condon, J. J.; Arbizzani, E. (1999). "Arcsecond Positions of UGC Galaxies". The Astrophysical Journal Supplement Series. 125 (2): 409–412. Bibcode: 1999ApJS..125..409C. doi: 10.1086/313286. S2CID 122517686.
- ^ a b c "Dwarf galaxy: small but perfectly formed". www.spacetelescope.org. Retrieved 8 August 2021.
- ^ a b c d e "Dynamics of starbursting dwarf galaxies" (PDF). Retrieved 8 August 2021.
- ^ McConnachie, Alan W. (2012-06-05). "The Observed Properties of Dwarf Galaxies in and Around the Local Group". The Astronomical Journal. 144 (1): 4. arXiv: 1204.1562. Bibcode: 2012AJ....144....4M. doi: 10.1088/0004-6256/144/1/4. ISSN 0004-6256. S2CID 118515618.
- ^ a b Plait, Phil (25 April 2011). "And the cottonball galaxies shall inherit the Universe". Slate Magazine. Retrieved 8 August 2021.
- ^
a
b
c
d Aparicio, A.; Tikhonov, N.; Karachentsev, I. (1999).
"Aparicio, Tikhonov, & Karachentsev, DDO 187".
arXiv:
astro-ph/9909493.
doi:
10.1086/301157.
S2CID
15309075. Retrieved 8 August 2021.
{{ cite journal}}: Cite journal requires|journal=( help)
| Stars |
| ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||
| |||||||||||
| Galaxies |
| ||||||||||
| |||||||||||
| |||||||||||
|
| This galaxy-related article is a stub. You can help Wikipedia by expanding it. |