Identification of 106 new infrared carbon stars in the IRAS Point Source Catalog - Near-infrared photometry and their space distribution in the galaxy

Autor(en)

F. Guglielmo, Nicolas Epchtein, Th Le Bertre, Pascal Fouque, Josef Hron, Franz Kerschbaum, J. R. D. Lepine

Abstrakt

A method based solely on IR colors - the combination of near-IR and IRAS colors - is used to identify 106 new IR carbon stars (IRCS). It is shown that the proportion of IRCS in a region of the IRAS two-color diagram previously thought to contain the largest concentration of such stars is not as large as expected for the faintest objects. A local spatial number density of about 12 IRCS/sq kpc is estimated. It is shown to be uniform within 5 to 11 kpc from the galactic center. The local ratio of IRCS to optical carbon stars is found to be about 35 percent. A total restitution rate of about 10 to the -4 solar masses/yr/sq kpc is derived. The efficiency of the combination of near and mid-IR photometry for the study of AGB stars is confirmed.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Université de recherche Paris Sciences et Lettres, Universidade Federal de São Paulo, Université Côte d'Azur, Laboratoire d'Etude du Rayonnement et de la Matiere en Astrophysique, Laboratoire d’Astrophysique de Toulouse-Tarbes

Journal

Astronomy & Astrophysics Supplement Series

Band

99

Seiten

31 - 69

Anzahl der Seiten

39

ISSN

0365-0138

Publikationsdatum

05-1993

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie, 103004 Astrophysik

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/identification-of-106-new-infrared-carbon-stars-in-the-iras-point-source-catalog--nearinfrared-photometry-and-their-space-distribution-in-the-galaxy(0e42d250-aaa6-4ceb-9065-730c502816ac).html