Canes Venatici II

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Canes Venatici II Dwarf Galaxy[1]
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension12h 57m 10s[1]
Declination+34° 19′ 15″[1]
Distance490+49
−43 kly (150+15
−13 kpc)[2]
522+16
−13 kly (160+4
−5 kpc)[3]
Apparent magnitude (V)15.1±0.5[2]
Characteristics
TypedSph[2]
Apparent size (V)3.2′+0.6′
−0.4′[4]
Other designations
CVn II[1][note 1], PGC 4713558

Canes Venatici II or CVn II is a dwarf spheroidal galaxy situated in the Canes Venatici constellation and discovered in 2006 in data obtained by the Sloan Digital Sky Survey.[2] The galaxy is located at a distance of about 150 kpc from the Sun and moves towards the Sun with the velocity of about 130 km/s.[2][6] It is classified as a dwarf spheroidal galaxy (dSph) meaning that it has an elliptical (ratio of axes ~ 2:1) shape with a half-light radius of about 74+14
−10 pc.[4]

CVn II is one of the smallest and faintest satellites of the

mass to light ratio is around 340. A high mass to light ratio implies that CVn II is dominated by dark matter.[6]

The stellar population of CVn II consists mainly of old stars formed more than 12 billion years ago.

neutral hydrogen in it—the upper limit is 14000 solar masses.[8]

Notes

  1. ^ The galaxy was also independently discovered by T. Sakamoto and T. Hasegawa as SDSS J1257+3419.[5]

References

  1. ^ a b c d "NAME CVn II dSph". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-02-06.
  2. ^
    S2CID 18617277
    .
  3. ^
    S2CID 15329975
    .
  4. ^
    S2CID 17838966
    .
  5. S2CID 14996020
    .
  6. ^
    S2CID 9715950
    .
  7. S2CID 3185311
    .
  8. doi:10.1088/0004-637X/696/1/385
    .


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