Bibcode
Battaner, E.; Beckman, J. E.; Mediavilla, E.; Prieto, M.; Sanchez Magro, C.; Munoz Tunon, C.; Sanchez Saavedra, M. L.
Referencia bibliográfica
Astronomy and Astrophysics (ISSN 0004-6361), vol. 161, no. 1, June 1986, p. 70-74.
Fecha de publicación:
6
1986
Número de citas
14
Número de citas referidas
13
Descripción
Four radial profiles of M 31 in the near infrared taken with the 1.5 m
infrared telescope of the Observatorio del Teide, Tenerife are
presented. Three of these, in the J, H, K bands extend 20 kpc eastward
from the galactic center, while a K band profile extends from the center
to 20 kpc westward. These data are combined with published visual
observations. Intrinsic magnitudes and colors were obtained after
removing the effects of extinction in the Galaxy and intrinsic
extinction within M 31. At its maximum, the latter is close to 1 mag in
the visible, as calculated from the gas surface density within the ring.
A bluer zone of stellar population coincident with the known position of
the gaseous ring in the disc of M 31 is clearly shown. The photometric
properties of the M 31 blue zone are comparable to those found by Prieto
et al. (1985), for the ring in NGC 2841.