Pegasus Dwarf Spheroidal Galaxy
| Pegasus Dwarf Spheroidal Galaxy | |
|---|---|
 Pegasus Dwarf Spheroidal Galaxy with the legacy surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Pegasus |
| Right ascension | 23h 51m 46.3s[1] |
| Declination | +24° 34′ 57″[1] |
| Heliocentric radial velocity | −341.6 ± 1.7 km/s[2] |
| Distance | 2.713 ± 0.075 Mly (831.8 ± 23 kpc)[2] |
| Apparent magnitude (V) | 24.6[2] |
| Absolute magnitude (V) | −11.6[2] |
| Characteristics | |
| Type | dSph[3] |
| Apparent size (V) | 4.0′ × 2.0′[1] |
| Other designations | |
| Pegasus II,[1] Andromeda VI,[1] Peg dSph,[1] KKH 99,[1] PGC 2807158 | |
The Pegasus Dwarf Spheroidal (also known as Andromeda VI or Peg dSph for short) is a dwarf spheroidal galaxy about 2.7 million light-years away in the constellation Pegasus. The Pegasus Dwarf is a member of the Local Group and a satellite galaxy of the Andromeda Galaxy (M31).
General information
[edit]
The Pegasus Dwarf Spheroidal is a galaxy with mainly metal-poor stellar populations.[4] Its metallicity is [Fe/H] ≃ −1.3.[5] It is located at the right ascension 23h51m46.30s and declination +24d34m57.0s in the equatorial coordinate system (epoch J2000.0), and in a distance of about 830 kpc from Earth and a distance of 281.6 kpc from the Andromeda Galaxy.[2]
The galaxy was discovered in 1999[6] by various authors on the Second Palomar Observatory Sky Survey (POSS II) films.[7]
See also
[edit]- List of Andromeda's satellite galaxies
- Pegasus Dwarf Irregular Galaxy (Peg DIG)
- Pegasus galaxy, the Stargate Atlantis fictional location (probably the Pegasus Dwarf Irregular Galaxy).
References
[edit]- ^ a b c d e f g "Results for object Andromeda VI (Pegasus Dwarf Spheroidal)". NASA/IPAC Extragalactic Database. Archived from the original on March 18, 2025. Retrieved March 18, 2025.
- ^ a b c d e Pickett, Connor S.; Collins, Michelle L M.; Rich, R Michael; Read, Justin I.; Charles, Emily J E.; Martin, Nicolas; Chapman, Scott; McConnachie, Alan; Savino, Alessandro; Weisz, Daniel R. (2025). "Mass modelling the Andromeda Dwarf Galaxies: Andromeda VI and Andromeda XXIII". Monthly Notices of the Royal Astronomical Society. 540 (2): 1701–1718. arXiv:2505.04475. Bibcode:2025MNRAS.540.1701P. doi:10.1093/mnras/staf796.
- ^ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics. 49 (1): 3–18. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6. S2CID 120973010.
- ^ Van den Bergh, Sidney (May 15, 2000). The Galaxies of the Local Group. Cambridge Astrophysics. p. 240. ISBN 978-1-139-42965-8.
- ^ McConnachie, A. W.; Irwin, M. J.; Ferguson, A. M. N.; Ibata, R. A.; Lewis, G. F.; Tanvir, N. (2005). "Distances and metallicities for 17 Local Group galaxies". Monthly Notices of the Royal Astronomical Society. 356 (4): 979–997. arXiv:astro-ph/0410489. Bibcode:2005MNRAS.356..979M. doi:10.1111/j.1365-2966.2004.08514.x.
- ^ Pritzl, Barton J.; Armandroff, Taft E.; Jacoby, George H.; Da Costa, G. S. (May 2005). "The Dwarf Spheroidal Companions to M31: Variable Stars in Andromeda I and Andromeda III". The Astronomical Journal. 129 (5): 2232–2256. arXiv:astro-ph/0501083. Bibcode:2005AJ....129.2232P. doi:10.1086/428372. S2CID 9749493.
- ^ Wallace Sargent. "The Second Palomar Observatory Sky Survey (POSS II)". Caltech. Archived from the original on 2009-05-16.
External links
[edit]- NASA/IPAC Extragalactic Database: Pegasus Dwarf Spheroidal
- Armandroff, Jacoby, & Davies, "Low Surface Brightness Galaxies around M31", Astrophys. J. 118, 1220-1229 (1999).
| Location | Andromeda Galaxy → Andromeda subgroup → Local Group → Local Sheet → Local Volume → Virgo Supercluster → Laniakea Supercluster → Pisces–Cetus Supercluster Complex → Local Hole → Observable universe → Universe Each → may be read as "within" or "part of". | .jpg) |
|---|---|---|
| Satellite galaxies |
*It is uncertain whether these are companion galaxies of the Andromeda Galaxy | |
| Catalogued stars | ||
| Other | ||
