2010A&A...519A..38D


Query : 2010A&A...519A..38D

2010A&A...519A..38D - Astronomy and Astrophysics, volume 519, A38-38 (2010/9-1)

Detection of frequency spacings in the young o-type binary HD 46149 from CoRoT photometry.

DEGROOTE P., BRIQUET M., AUVERGNE M., SIMON-DIAZ S., AERTS C., NOELS A., RAINER M., HARETER M., PORETTI E., MAHY L., OREIRO R., VUCKOVIC M., SMOLDERS K., BAGLIN A., BAUDIN F., CATALA C., MICHEL E. and SAMADI R.

Abstract (from CDS):

Using the CoRoT space based photometry of the O-type binary HD46149, stellar atmospheric effects related to rotation can be separated from pulsations, because they leave distinct signatures in the light curve. This offers the possibility of characterising and exploiting any pulsations seismologically. Combining high-quality space based photometry, multi-wavelength photometry, spectroscopy and constraints imposed by binarity and cluster membership, the detected pulsations in HD46149 are analyzed and compared with those for a grid of stellar evolutionary models in a proof-of-concept approach. We present evidence of solar-like oscillations in a massive O-type star, and show that the observed frequency range and spacings are compatible with theoretical predictions. Thus, we unlock and confirm the strong potential of this seismically unexplored region in the HR diagram.

Abstract Copyright:

Journal keyword(s): binaries: spectroscopic - stars: individual: HD46149 - stars: massive - stars: oscillations - asteroseismology

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 * ksi Per ** 03 58 57.9022917 +35 47 27.713205 3.190 4.080 4.060 3.88 3.89 O7.5III(n)((f)) 818 0
2 HD 46149 SB* 06 31 52.5319291296 +05 01 59.178678024 7.03 7.80 7.61 7.54 7.36 O8.5V 266 0
3 HD 46202 ** 06 32 10.4728 +04 57 59.818 7.60 8.36 8.19 7.98 7.86 O9.2V 270 0
4 NGC 2244 OpC 06 32 11 +04 54.8           ~ 600 1
5 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 474 1
6 HD 180642 bC* 19 17 14.8038514896 +01 03 33.904495728 7.83 8.47 8.29     B1.5II-III 96 0
7 * lam Cep s*b 22 11 30.5765111040 +59 24 52.154264880 4.55 5.29 5.05 4.77 4.62 O6.5I(n)fp 669 1

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2022.11.30-15:33:25

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