Bibcode
DOI
Aparicio, A.
Bibliographical reference
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 437, no. 1, p. L27-L30
Advertised on:
12
1994
Journal
Citations
38
Refereed citations
35
Description
The distance of the Pegasus Dwarf Irregular Galaxy is discussed in the
light of new, deep photometry of the resolved stars taken in the bands
V, R, and I of the Johnson-Cousins system. The tip of the red giant
branch is identified beyond doubt. From its position, a distance modulus
of (m - M)0 = 24.9 +/- 0.1 is derived, in disagreement with
the previous estimate by Hoessel et al., based on Cepheid light curves
(m - M)0 = 26.22 +/- 0.2). The new estimate of (m -
M)0 = 24.9 implies that Pegasus is at about 0.64 Mpc from the
center of gravity of the Local Group. This distance makes Pegasus a
highly probable member of the Local Group and is consistent with the
heliocentric velocity of this galaxy. Finally, a list of six Cepheid
candidates is given on the basis of the new photometry.