The paper continues the study of superfast line profile variations (LPV) in spectra of early-type stars. The multimode focal reducer SCORPIO at the 6-meter telescope (BTA) was used to obtain 1271 low-resolution spectra of ρ Leo (B1 Iab). Regular LPVs for H I, He I, Fe II, N II, O II, Si III, and other ion lines with periods from ̃ 2 to ̃ 90 minutes and an amplitude of 1-2% of the continuum level are detected. Nonregular LPVs were also detected at time intervals less then a minute. The harmonics of LPVs with periods less than 10 minutes appear to be variable. During 128 minutes of observation their periods can change by ̃ 40%. Possible causes of such fast spectral variations are discussed.
Original languageEnglish
Title of host publicationPhysics of Magnetic Stars
Subtitle of host publicationProceedings of a Conference Held at Special Astrophysical Observatory, Nizhny Arkhyz, Russia, 1-5 October 2018
EditorsI.I. Romanyuk, I. A. Yakunin, D.O. Kudryavtsev
Place of PublicationSan Francisco
PublisherAstronomical Society of the Pacific
Pages151-153
ISBN (Electronic)9781586819241
ISBN (Print)9781583819234
StatePublished - 1 Jul 2019
EventInternational Conference "Physics of Magnetic Stars" - Nizhny Arkhyz, Russian Federation
Duration: 1 Oct 20195 Oct 2019

Publication series

NameAstronomical Society of the Pacific Conference Series
PublisherAstronomical Society of the Pacific
Volume518
ISSN (Electronic)1050-3390

Conference

ConferenceInternational Conference "Physics of Magnetic Stars"
Country/TerritoryRussian Federation
CityNizhny Arkhyz
Period1/10/195/10/19

    Scopus subject areas

  • Physics and Astronomy(all)

ID: 49301276