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HD 254992


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Identification of 106 new infrared carbon stars in the IRAS Point Source Catalog - Near-infrared photometry and their space distribution in the galaxy
A method based solely on IR colors - the combination of near-IR and IRAScolors - is used to identify 106 new IR carbon stars (IRCS). It is shownthat the proportion of IRCS in a region of the IRAS two-color diagrampreviously thought to contain the largest concentration of such stars isnot as large as expected for the faintest objects. A local spatialnumber density of about 12 IRCS/sq kpc is estimated. It is shown to beuniform within 5 to 11 kpc from the galactic center. The local ratio ofIRCS to optical carbon stars is found to be about 35 percent. A totalrestitution rate of about 10 to the -4 solar masses/yr/sq kpc isderived. The efficiency of the combination of near and mid-IR photometryfor the study of AGB stars is confirmed.

The Distribution of the BD M-Type Stars Along the Galactic Equator.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1958ApJ...128..510N&db_key=AST

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Avci
Sað Açýklýk:06h18m43.38s
Yükselim:+07°30'26.7"
Görünürdeki Parlaklýk:8.896
özdevim Sað Açýklýk:5.4
özdevim Yükselim:-7.3
B-T magnitude:11.094
V-T magnitude:9.078

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 254992
TYCHO-2 2000TYC 731-3370-1
USNO-A2.0USNO-A2 0975-02933748
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