Published May 15, 1990
| Version v1
Journal article
Mass ejections from the rapidly rotating M dwarf star Gl 890
Creators
- 1. Armagh Observatory, Northern Ireland (UK)
- 2. Sussex Univ., Brighton (UK). Astronomy Centre
Description
Mg II line fluxes from the rapidly rotating single M dwarf Gliese 890 show a 'dip' lasting ≤ 120 min. Hα spectra obtained simultaneously show systematic profile changes during the Mg II 'dip': the line bisector of the Hα emission feature shows at first a red then a blue displacement. The behaviour of both the Hα line bisector and the Mg II emission 'dip' is consistent with a model in which a cloud of mainly neutral hydrogen passes in front of the disc of the star. Similar behaviour has been observed in the rapidly rotating single K dwarf AB Doradus. The projected area of the Gl 890 cloud is 0.25-0.40 times that of the stellar disc. (author)
Additional details
Publishing Information
- Journal Title
- Monthly Notices of the Royal Astronomical Society
- Journal Volume
- 244
- Journal Issue
- 2
- Series
- Mon. Not. R. Astron. Soc.
- Journal Page Range
- 291-293
- ISSN
- 0035-8711
- CODEN
- MNRAA
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- United Kingdom
- INIS RN
- 21073557
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BALMER LINES; DWARF STARS; EMISSION SPECTRA; EXPERIMENTAL DATA; LINE WIDTHS; MAGNESIUM IONS; MASS TRANSFER; ROTATION; ULTRAVIOLET SPECTRA; VISIBLE SPECTRA
- Descriptors DEC
- ATOMIC IONS; CHARGED PARTICLES; DATA; INFORMATION; IONS; NUMERICAL DATA; SPECTRA; STARS