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| Paper: |
Short Timescale Line Profile Variations in Spectra of OB Stars: the Case of ρ Leo |
| Volume: |
518, Physics of Magnetic Stars |
| Page: |
153 |
| Authors: |
Batrakov, A. A.; Kholtygin, A. F.; Fabrika, S.; Valeev, A. |
| Abstract: |
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. |
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