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| Query : 2013ApJ...777...10P |
2013ApJ...777...10P - Astrophys. J., 777, 10 (2013/November-1)
Short timescale variations in the atmosphere of Antares A.
PUGH T. and GRAY D.F.
Abstract (from CDS):
We analyze three years of high-resolution spectroscopic data and find radial velocity variations with a characteristic timescale of 100±6 days that are nearly sinusoidal. Simultaneous variations in line-depth ratios imply temperature variations of up to 100 K. No photometric variation is seen on a 100 day timescale. The timescale of the variation and its resonant nature suggest solar-like oscillations driven by large-scale convection.
Abstract Copyright: ∼
Journal keyword(s): convection - stars: individual: alpha Sco A - stars: late-type - supergiants - techniques: radial velocities - techniques: spectroscopic
Simbad objects: 3
| Number of rows : 3 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | * alf Ori | s*r | 05 55 10.30536 | +07 24 25.4304 | 4.38 | 2.27 | 0.42 | -1.17 | -2.45 | M1-M2Ia-Iab | 1789 | 0 |
| 2 | * alf Hya | * | 09 27 35.24270 | -08 39 30.9583 | 5.14 | 3.42 | 1.97 | 0.93 | 0.16 | K3IIIa | 455 | 1 |
| 3 | * alf Sco | s*r | 16 29 24.45970 | -26 25 55.2094 | 4.08 | 2.75 | 0.91 | -0.64 | -1.87 | M1.5Iab+B2Vn | 786 | 0 |
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