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K2 photometry and HERMES spectroscopy of the blue supergiant ρLeo: rotational wind modulation and low-frequency waves

Abstract:

We present an 80-d long uninterrupted high-cadence K2 light curve of the B1Iab supergiant rho Leo (HD 91316), deduced with the method of halo photometry. This light curve reveals a dominant frequency of $f_{\rmrot}=0.0373$d$^{-1}$ and its harmonics. This dominant frequency corresponds with a rotation period of 26.8d and is subject to amplitude and phase modulation. The K2 photometry additionally reveals multiperiodic low-frequency variability ($<1.5 $d$^{-1}$) and is in full agreement with...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted manuscript

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Publisher copy:
10.1093/mnras/sty308

Authors


Bowman, DM More by this author
Simon-Diaz, S More by this author
Buysschaert, B More by this author
Johnston, CC More by this author
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Grant:
Horizon 2020 670519: MAMSIE
Publisher:
Oxford University Press Publisher's website
Journal:
Monthly Notices of the Royal Astronomical Society Journal website
Volume:
476
Issue:
1
Pages:
1234–1241
Publication date:
2018-02-09
Acceptance date:
2018-02-02
DOI:
EISSN:
1365-2966
ISSN:
0035-8711
Pubs id:
pubs:824014
URN:
uri:e08ae081-80ac-4622-b367-9850d78b2f71
UUID:
uuid:e08ae081-80ac-4622-b367-9850d78b2f71
Local pid:
pubs:824014

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