Optical spectrophotometry of HR 1099 during a major flare outburst

Journal Article · Fri Dec 01 04:00:00 EST 1978 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/112358· OSTI ID:6879297

Furenlid, I; Young, A

A recent outburst of the active RS CVn star HR 1099 was detected at radio wavelengths and communicated in time for simultaneous optical observations. A pair of high-dispersion (9 and 18 A/mm) spectrograms were obtained covering the wavelength region lambda3640--7000 A, and have been analyzed photometrically. Exceptionally strong emission was found at H..cap alpha.. and at the CaII H and K lines. All of the members of the Balmer series exhibit emission characteristics with a decrement considerably less steep than that exhibited by normal recombination radiation from gaseous nebulae. Arguments are made that nonthermal excitation mechanisms are required to account for the data.

• Research Organization: Kitt Peak National Observatory, Tucson, Arizona 85726
• OSTI ID: 6879297
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 83:12; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
BINARY STARS
ELECTROMAGNETIC RADIATION
EMISSION
EMISSION SPECTRA
IONIZING RADIATIONS
LINE WIDTHS
NEBULAE
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
SPECTROPHOTOMETRY
STARS
X RADIATION