Published May 1991
| Version v1
Journal article
The nature of two faint blue stars - Discovery of a helium-rich sdB and a normal sdB
Creators
- 1. Kiel, Universitaet (West Germany)
- 2. Dartmouth College, Hanover, NH (USA)
Description
A coarse spectroscopic analysis is presented of the faint blue stars JL87 and JL111, which are rather different despite their nearly identical UBV colors. JL87 is shown to be a helium-rich subluminous B star. Its abundance ratio n(He)/n(H) = 0.2 is abnormally high compared to the bulk of the sdB stars that have strongly helium-depleted atmospheres relative to the sun. Observers are urged to look for a magnetic field in this star that could have caused the abundance anomaly. The other star, JL111, appears to be a quite normal, slightly hotter sdB. 27 refs
Additional details
Publishing Information
- Journal Title
- Publications of the Astronomical Society of the Pacific
- Journal Volume
- 103
- Series
- Publ. Astron. Soc. Pac.
- Journal Page Range
- 435-438
- ISSN
- 0004-6280
- CODEN
- PASPA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 22078849
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- CHEMICAL COMPOSITION; COLOR; DWARF STARS; ELEMENT ABUNDANCE; HELIUM; LUMINOSITY; MAGNETIC FIELDS; SPECTROPHOTOMETRY; STELLAR ATMOSPHERES
- Descriptors DEC
- ATMOSPHERES; ELEMENTS; NONMETALS; OPTICAL PROPERTIES; ORGANOLEPTIC PROPERTIES; PHYSICAL PROPERTIES; QUANTITY RATIO; RARE GASES; STARS