Optical and ultraviolet activity in RT Lacertae during 1985 and 1986

Journal Article · Sun May 01 04:00:00 EDT 1988 · Publ. Astron. Soc. Pac.; (United States)

DOI:https://doi.org/10.1086/132209· OSTI ID:6766681

Huenemoerder, D P

Continued monitoring of optical spectra of RT Lac, a peculiar RS CVn system, showed a large range of activity in the H-alpha line. At times, there was no excess emission or absorption, and at others, much. During active times, the excess emission varied greatly with phase and seemed to come from an extended region. Two UV observations, taken contemporaneously with optical spectra, also showed strong variations in the emission-line strengths. The data are consistent with intermittent mass transfer and imply that RT Lac is similar to other objects which have transient disks. 22 references.

• Research Organization: Pennsylvania State Univ., University Park (USA)
• OSTI ID: 6766681
• Journal Information: Publ. Astron. Soc. Pac.; (United States), Journal Name: Publ. Astron. Soc. Pac.; (United States) Vol. 100; ISSN PASPA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
BINARY STARS
ECLIPSE
SPECTRA
STARS
STELLAR ACTIVITY
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA