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'''UGG 8508''' is a dwarf [[irregular galaxy]] located about 8.5 million light-years away from Earth in the constellation of [[Ursa Major]].<ref name="NED" /> It is sometimes classified as a member of the [[M101 Group]] of galaxies and has a diameter of around {{cvt|1.29|kpc|kly|order=flip|lk=on}}.
'''UGG 8508''' is a dwarf [[irregular galaxy]] located about 8.5 million light-years away from Earth in the constellation of [[Ursa Major]].<ref name="NED" /> It is sometimes classified as a member of the [[M101 Group]] of galaxies and has a diameter of around {{cvt|1.29|kpc|kly|order=flip|lk=on}}.


As an irregular galaxy, UGC 8508 does not exhibit any large scale organization in its structure. It has a relatively low-luminosity and a large number of [[H I region]]s, which contribute to its bluish appearance in the [[visible light|visible spectrum]]. However, the presence of a significant number of both blue and red [[supergiant stars]] indicate it is likely to have undergone a period of rapid star formation in the cosmologically-recent past. The distribution of the supergiants suggest that the star formation has largely ceased at distances greater than {{cvt|0.4|kpc|kly|order=flip|lk=on}} from the center of the galaxy.<ref name="mouldetal1986">{{cite journal| author=J. R. Mould| author2=D. P. Schneider| author3=P. Harding| author4=G. D. Bothun | name-list-style=amp| title=UGC 8508 - A Dwarf Galaxy Associated with the M101 Group| journal=Publications of the [[Astronomical Society of the Pacific]]| date=1986| volume=98| issue=606| pages=732-739|arxiv = |bibcode = |doi = 10.1086/131819 | s2cid=}}</ref>
As an irregular galaxy, UGC 8508 does not exhibit any large scale organization in its structure. It has an overall bluish appearance when viewed in the [[visible light|visible spectrum]] and although it has a large number of [[H I region]]s, overall it has a relatively low-luminosity. However, the presence of a significant number of both blue and red [[supergiant stars]] indicate it is likely to have undergone a period of rapid star formation in the cosmologically-recent past. The distribution of the supergiants suggest that the star formation has largely ceased at distances greater than {{cvt|0.4|kpc|kly|order=flip|lk=on}} from the center of the galaxy.<ref name="mouldetal1986">{{cite journal| author=J. R. Mould| author2=D. P. Schneider| author3=P. Harding| author4=G. D. Bothun | name-list-style=amp| title=UGC 8508 - A Dwarf Galaxy Associated with the M101 Group| journal=Publications of the [[Astronomical Society of the Pacific]]| date=1986| volume=98| issue=606| pages=732-739|arxiv = |bibcode = |doi = 10.1086/131819 | s2cid=}}</ref>


==References==
==References==

Revision as of 02:42, 16 February 2024

UGC 8508
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension13h 30m 44.4s
Declination+54° 54′ 36″
Redshift+198 km/s
Distance8.500 ± 0.075 Mly (2.606 ± 0.023 Mpc)[1]
Apparent magnitude (V)12.88
Characteristics
TypeIAm
Size1.29 kpc
Apparent size (V)1.7′ × 1.0'
Other designations
I Zw 060, PGC 47495

UGG 8508 is a dwarf irregular galaxy located about 8.5 million light-years away from Earth in the constellation of Ursa Major.[1] It is sometimes classified as a member of the M101 Group of galaxies and has a diameter of around 4.2 kly (1.29 kpc).

As an irregular galaxy, UGC 8508 does not exhibit any large scale organization in its structure. It has an overall bluish appearance when viewed in the visible spectrum and although it has a large number of H I regions, overall it has a relatively low-luminosity. However, the presence of a significant number of both blue and red supergiant stars indicate it is likely to have undergone a period of rapid star formation in the cosmologically-recent past. The distribution of the supergiants suggest that the star formation has largely ceased at distances greater than 1.3 kly (0.4 kpc) from the center of the galaxy.[2]

References

  1. ^ a b "NED results for UGC 8508". NASA/IPAC Extragalactic Database via Univ. of California. Retrieved 2024-02-15.
  2. ^ J. R. Mould; D. P. Schneider; P. Harding & G. D. Bothun (1986). "UGC 8508 - A Dwarf Galaxy Associated with the M101 Group". Publications of the Astronomical Society of the Pacific. 98 (606): 732–739. doi:10.1086/131819.

External links

  • Media related to UGC 8508 at Wikimedia Commons