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UGC 9128

From Wikipedia, the free encyclopedia

UGC 9128
UGC 9128
Observation data (J2000 epoch)
ConstellationBoötes
Right ascension14h 15m 56.70s[1]
Declination23° 03′ 16.2″[1]
Distance6.8–7.8 Mly (2.1–2.4 Mpc)[2][3]
Characteristics
TypedIrr[4]
Mass(1.3±0.2)×107 [3] M☉
Size3300 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

  1. ^ 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.
  2. ^ a b c "Dwarf galaxy: small but perfectly formed". www.spacetelescope.org. Retrieved 8 August 2021.
  3. ^ a b c d e "Dynamics of starbursting dwarf galaxies" (PDF). Retrieved 8 August 2021.
  4. ^ 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.
  5. ^ a b Plait, Phil (25 April 2011). "And the cottonball galaxies shall inherit the Universe". Slate Magazine. Retrieved 8 August 2021.
  6. ^ 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)
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This page was last edited on 27 February 2024, at 22:29
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