dc.creator |
Men'shchikov, A. B. |
|
dc.creator |
Miroshnichenko, A. S. |
|
dc.creator |
Levato, H. |
|
dc.creator |
Bjorkman, K. S. |
|
dc.creator |
Grosso, M. |
|
dc.creator |
Manset, N. |
|
dc.creator |
Rudy, R. J. |
|
dc.creator |
Lynch, D. K. |
|
dc.creator |
Mazuk, S. |
|
dc.creator |
Venturini, C. C. |
|
dc.date.accessioned |
2015-04-17T14:19:09Z |
|
dc.date.available |
2015-04-17T14:19:09Z |
|
dc.date.issued |
2004-04 |
|
dc.identifier.issn |
0004-6361 |
|
dc.identifier.uri |
http://library2.smu.ca/xmlui/handle/01/26057 |
|
dc.description |
Publisher's version/PDF |
en_CA |
dc.description.abstract |
We present the results of optical and near-IR spectroscopic and mid-IR imaging observations of the emission-line star MWC 300. Its properties and evolutionary state are still under debate (a B[e] supergiant or a Herbig Be star). For the first time we detected radial velocity variations of the photospheric lines and found a correlation between them and those of the He [iota] [lambda]5876 [Angstrom] line. Most of the pure emission lines had stable positions for nearly 20 years. New estimates of the object’s luminosity (log L/L[subscript circled dot] = 5.1 [plus or minus] 0.1), distance (D = 1.8 [plus or minus] 0.2 kpc), and systemic velocity (+26 [plus or minus] 2 km s[superscript −1]) were derived. We found that both the circumstellar extinction in the disk-like dusty envelope and the interstellar extinction play a significant role in the attenuation of the stellar brightness. Our 2D modeling of the observed spectral energy distribution in the wavelength range from 0.3 [micrometres] to 1.3 mm suggests that the star is viewed through a gaseous-and-dusty flared disk with an opening angle of 30[degrees symbol], an inclination angle of 10[degrees symbol], an equatorial optical depth [tau][subscript V] = 3.0, and a total mass of 0.08 M[subscript circled dot]. We argue that MWC 300 is most likely a binary system, because of the similarities of its observed parameters with those of recognized B[e] binaries. |
en_CA |
dc.description.provenance |
Submitted by Janine Mills (janine.mills@smu.ca) on 2015-04-17T14:19:09Z
No. of bitstreams: 1
Menshchikov_AB_article_2004.pdf: 336168 bytes, checksum: 2572c754c40abf31ae459db75f056655 (MD5) |
en |
dc.description.provenance |
Made available in DSpace on 2015-04-17T14:19:09Z (GMT). No. of bitstreams: 1
Menshchikov_AB_article_2004.pdf: 336168 bytes, checksum: 2572c754c40abf31ae459db75f056655 (MD5)
Previous issue date: 2004 |
en |
dc.language.iso |
en |
en_CA |
dc.publisher |
European Southern Observatory |
en_CA |
dc.publisher |
EDP Sciences |
|
dc.relation.uri |
http://dx.doi.org/10.1051/0004-6361:20034181 |
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dc.rights |
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user. |
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dc.subject.lcsh |
Be stars |
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dc.subject.lcsh |
Astronomical spectroscopy |
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dc.subject.lcsh |
Circumstellar matter |
|
dc.subject.lcsh |
Radiative transfer |
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dc.title |
Properties of galactic B[e] supergiants III. MWC 300 |
en_CA |
dc.type |
Text |
en_CA |
dcterms.bibliographicCitation |
Astronomy & Astrophysics 417(2), 731-743. (2004) |
en_CA |
Copyright statement:
Article is made available in accordance with the publisher’s policy and is subject to copyright law. Please refer to the publisher’s site. Any re-use of this article is to be in accordance with the publisher’s copyright policy. This posting is in no way granting any permission for re-use to the reader/user.