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HD 55000


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An IRAS survey of main sequence B, A, and F stars
Results are presented of an IRAS survey of main-sequence B, A, and Fstars, based on three primary sources as a data base: theBernacca-Perinotto Catalog of Stellar Rotational Velocities, theMichigan Spectral Catalog, and the Bright Star Catalog. The stars in thedata base are divided into four categories: (1) main-sequence singlestars, (2) main-sequence close binary stars, (3) spectrally peculiarstars such as Am, Ap, Fm, and Fp stars, and (4) subgiants. It is foundthat about 20 percent of main-sequence single stars show an IR colorexcess in at least one of the 12, 25, or 60 micron IRAS bands, while theother three groups do not show any statistically significant percentageof IR color excess stars. It is also found that stars with large (v sini) values are more likely to show color excesses at IRAS wavelengthsthan stars with small (v sin i) values.

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Pupa
Sað Açýklýk:07h08m58.13s
Yükselim:-45°19'52.7"
Görünürdeki Parlaklýk:7.001
Uzaklýk:297.619 parsek
özdevim Sað Açýklýk:-9.7
özdevim Yükselim:10.8
B-T magnitude:6.931
V-T magnitude:6.996

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 55000
TYCHO-2 2000TYC 8119-519-1
USNO-A2.0USNO-A2 0375-03115067
HIPHIP 34506

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