Soft x-ray observations of the early b-giants beta and epsilon CMA

J.E. Drew; M. Denby; M.G. Hoare

Soft x-ray observations of the early b-giants beta and epsilon CMA

J.E. Drew, M. Denby, M.G. Hoare

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Abstract

The study reports observations performed with the PSPC on board the Roentgensatellit (ROSAT) of the two nearby giant stars Beta CMa (B1 II-III) and Epsilon CMa (B2 II). Upper limits in the region of +/- 10 percent can be set on the variation of the 0.1-0.4 keV and 0.5-2.0 keV fluxes from Beta CMa. By attributing the soft X-ray emission to an outer zone of hot shocked gas enclosing the cool inner wind responsible for observed UV blueshifted absorption features, it is estimated that the mass loss for Beta and Epsilon CMa, respectively, are (6 +/- 2) x 10 exp 9 and (8 +/- 2) x 10 exp -9 solar mass/yr.

Original language	English
Pages (from-to)	917-924
Journal	Monthly Notices of the Royal Astronomical Society
Volume	266
Issue number	4
Publication status	Published - 1994

Cite this

@article{9b7e6e9c5847440cbd90aab59decc582,

title = "Soft x-ray observations of the early b-giants beta and epsilon CMA",

abstract = "The study reports observations performed with the PSPC on board the Roentgensatellit (ROSAT) of the two nearby giant stars Beta CMa (B1 II-III) and Epsilon CMa (B2 II). Upper limits in the region of +/- 10 percent can be set on the variation of the 0.1-0.4 keV and 0.5-2.0 keV fluxes from Beta CMa. By attributing the soft X-ray emission to an outer zone of hot shocked gas enclosing the cool inner wind responsible for observed UV blueshifted absorption features, it is estimated that the mass loss for Beta and Epsilon CMa, respectively, are (6 +/- 2) x 10 exp 9 and (8 +/- 2) x 10 exp -9 solar mass/yr.",

author = "J.E. Drew and M. Denby and M.G. Hoare",

note = "Original article can be found at: http://adsabs.harvard.edu/basic_search.html Copyright Royal Astronomical Society [Full text of this article is not available in the UHRA]",

year = "1994",

language = "English",

volume = "266",

pages = "917--924",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press (OUP)",

number = "4",

}

TY - JOUR

T1 - Soft x-ray observations of the early b-giants beta and epsilon CMA

AU - Drew, J.E.

AU - Denby, M.

AU - Hoare, M.G.

N1 - Original article can be found at: http://adsabs.harvard.edu/basic_search.html Copyright Royal Astronomical Society [Full text of this article is not available in the UHRA]

PY - 1994

Y1 - 1994

N2 - The study reports observations performed with the PSPC on board the Roentgensatellit (ROSAT) of the two nearby giant stars Beta CMa (B1 II-III) and Epsilon CMa (B2 II). Upper limits in the region of +/- 10 percent can be set on the variation of the 0.1-0.4 keV and 0.5-2.0 keV fluxes from Beta CMa. By attributing the soft X-ray emission to an outer zone of hot shocked gas enclosing the cool inner wind responsible for observed UV blueshifted absorption features, it is estimated that the mass loss for Beta and Epsilon CMa, respectively, are (6 +/- 2) x 10 exp 9 and (8 +/- 2) x 10 exp -9 solar mass/yr.

AB - The study reports observations performed with the PSPC on board the Roentgensatellit (ROSAT) of the two nearby giant stars Beta CMa (B1 II-III) and Epsilon CMa (B2 II). Upper limits in the region of +/- 10 percent can be set on the variation of the 0.1-0.4 keV and 0.5-2.0 keV fluxes from Beta CMa. By attributing the soft X-ray emission to an outer zone of hot shocked gas enclosing the cool inner wind responsible for observed UV blueshifted absorption features, it is estimated that the mass loss for Beta and Epsilon CMa, respectively, are (6 +/- 2) x 10 exp 9 and (8 +/- 2) x 10 exp -9 solar mass/yr.

M3 - Article

SN - 0035-8711

VL - 266

SP - 917

EP - 924

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Soft x-ray observations of the early b-giants beta and epsilon CMA

Abstract

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