Pegasus Dwarf Spheroidal Galaxy - Galaxy

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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).

Pegasus Dwarf Spheroidal Galaxy
Hubble Space Telescope image of Pegasus Dwarf Spheroidal Galaxy
Observation data (J2000 epoch)
Constellation	Pegasus
Right ascension	23^h 51^m 46.3^s[1]
Declination	+24° 34′ 57″[1]
Redshift	−354 ± 3 km/s[1]
Distance	2.7 ± 0.1 Mly (820 ± 20 kpc)[2][3]
Apparent magnitude (V)	14.2[1]
Characteristics
Type	dSph[2]
Apparent size (V)	4′.0 × 2′.0[1]
Notable features	-
Other designations
Pegasus II,[1] Andromeda VI,[1] Peg dSph,[1] KKH 99,[1] PGC 2807158

General information

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 820 ± 20 kpc from Earth and a distance of 294 ± 8 kpc^[a] from the Andromeda Galaxy.

The galaxy was discovered in 1999[6] by various authors on the Second Palomar Observatory Sky Survey (POSS II) films.[7]

Notes

^{^} For an angular distance θ between C and G, their mutual linear distance R is given by:
R² = D²
_g + D²
_c - 2 × D_g × D_c × cos(θ)[2]

References

"NASA/IPAC Extragalactic Database". Results for Pegasus Dwarf Spheroidal. Retrieved 2006-11-11.
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.
I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal. 127 (4): 2031–2068. Bibcode:2004AJ....127.2031K. doi:10.1086/382905.
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

v t e Andromeda Galaxy
Location	Andromeda Galaxy → Andromeda subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → KBC Void → Observable universe → Universe Each → may be read as "within" or "part of".	Andromeda Galaxy
Satellite galaxies	M32 M110 NGC 185 NGC 147 Andromeda I Andromeda II Andromeda III Andromeda IV* Andromeda V Andromeda VI Andromeda VII Andromeda VIII Andromeda IX Andromeda X Andromeda XI Andromeda XII Andromeda XIII Andromeda XIV Andromeda XV Andromeda XVI Andromeda XVII Andromeda XVIII Andromeda XIX Andromeda XX Andromeda XXI Andromeda XXII Andromeda XXIII Andromeda XXIV Andromeda XXV Andromeda XXVI Andromeda XXVII Andromeda XXVIII Andromeda XXIX Triangulum subgroup* *It is uncertain whether these are companion galaxies of the Andromeda Galaxy
Catalogued stars	AE Andromedae M31-RV
Other	Andromeda–Milky Way collision S Andromedae Mayall II M32p NGC 206 3XMM J004232.1+411314
Category

На других языках

[de] Pegasus-Zwerggalaxie

Als Pegasus-Zwerggalaxie werden zwei unterschiedliche Zwerggalaxien am Rand der Lokalen Gruppe bezeichnet.

- [en] Pegasus Dwarf Spheroidal Galaxy

[es] Andrómeda VI

Andrómeda VI, también llamada galaxia Enana Esferoidal de Pegaso (Peg dSph), es una galaxia enana esferoidal a unos 2,64 millones de años luz del sistema solar en dirección a la constelación de Pegaso. Fue descubierta por T.E. Armandroff, J.E. Davies y G.H. Jacoby en 1998 al mismo tiempo que la galaxia Andrómeda V (de ahí proviene el nombre de Andrómeda VI), y también de manera independiente por Igor Karachentsev del Observatorio Astrofísico Especial de Stávropol (Rusia) y Valentina Karachentseva de la Universidad de Kiev (Ucrania), que la designaron con el nombre de galaxia Enana de Pegaso.

[ru] Пегас (карликовая сфероидальная галактика)

Пегас (также Андромеда VI, And VI, Peg dSph) — карликовая сфероидальная галактика на расстоянии около 2,7 млн световых лет от Земли в созвездии Пегас. Входит в Местную группу галактик, является спутником Галактики Андромеды (М31).

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