WFRF:(Kochukhov O.)
Search: WFRF:(Kochukhov O.) > (2005-2009) > Discovery of a magn...
- 2 of 12
- Previous record
- Next record
- To hitlist
- Grunhut, H (author)
Discovery of a magnetic field in the O9 sub-giant star HD 57682 by the MiMeS Collaboration
- Article/chapterEnglish2009
Publisher, publication year, extent ...
- Oxford University Press (OUP),2009
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:uu-127415
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-127415URI
- https://doi.org/10.1111/j.1745-3933.2009.00771.xDOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- We report the detection of a strong, organized magnetic field in the O9IV star HD 57682, using spectropolarimetric observations obtained with ESPaDOnS at the 3.6-m Canada-France-Hawaii Telescope within the context of the Magnetism in Massive Stars (MiMeS) Large Programme. From the fitting of our spectra using non-local thermodynamic equilibrium model atmospheres, we determined that HD 57682 is a 17(-9)(+19)M(circle dot) star with a radius of 7.0(-1.8)(+2.4)R(circle dot) and a relatively low mass-loss rate of 1.4(-0.95)(+3.1) x 10(-9) M-circle dot yr(-1). The photospheric absorption lines are narrow, and we use the Fourier transform technique to infer v sin i = 15 +/- 3 km s(-1). This v sin i implies a maximum rotational period of 31.5 d, a value qualitatively consistent with the observed variability of the optical absorption and emission lines, as well as the Stokes V profiles and longitudinal field. Using a Bayesian analysis of the velocity-resolved Stokes V profiles to infer the magnetic field characteristics, we tentatively derive a dipole field strength of 1680(-356)(+134)G. The derived field strength and wind characteristics imply a wind that is strongly confined by the magnetic field.
Subject headings and genre
- NATURVETENSKAP Fysik hsv//swe
- NATURAL SCIENCES Physical Sciences hsv//eng
- stars: early-type
- stars: individual: HD 57682
- stars: magnetic fields
- stars: rotation
- stars: winds
- outflows
- Physics
- Fysik
Added entries (persons, corporate bodies, meetings, titles ...)
- Wade, A (author)
- Marcolino, F (author)
- Petit, V (author)
- Henrichs, F (author)
- Cohen, H (author)
- Alecian, E (author)
- Bohlender, D (author)
- Bouret, J.-C. (author)
- Kochukhov, OUppsala universitet,Institutionen för fysik och astronomi (author)
- Neiner, C (author)
- St-Louis, N (author)
- Townsend, D (author)
- Uppsala universitetInstitutionen för fysik och astronomi (creator_code:org_t)
Related titles
- In:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)400:1, s. L94-L980035-87111365-29661745-39251745-3933
Internet link
Find in a library
- Monthly notices of the Royal Astronomical Society (Search for host publication in LIBRIS)
To the university's database
- 2 of 12
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Grunhut, H
- Wade, A
- Marcolino, F
- Petit, V
- Henrichs, F
- Cohen, H
- show more...
- Alecian, E
- Bohlender, D
- Bouret, J.-C.
- Kochukhov, O
- Neiner, C
- St-Louis, N
- Townsend, D
- show less...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Physical Science ...
- Articles in the publication
- Monthly notices ...
- By the university
- Uppsala University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
