ROSAT observations of the RSCVn binary sigma Geminorum

Z. Yi; O. Elgaroy; O. Engvold; Niels Jørgen Stenfeldt Westergaard

ROSAT observations of the RSCVn binary sigma Geminorum

Z. Yi, O. Elgaroy, O. Engvold, Niels Jørgen Stenfeldt Westergaard

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

X-ray observations of the RSCVn system sigma Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.

Original language	English
Journal	Astronomy and Astrophysics
Volume	318
Issue number	3
Pages (from-to)	791-796
ISSN	0004-6361
Publication status	Published - 1997

Keywords

X-rays
Coronae
Stars sigma Gem
Stars

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title = "ROSAT observations of the RSCVn binary sigma Geminorum",

abstract = "X-ray observations of the RSCVn system sigma Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.",

keywords = "X-rays, Coronae, Stars sigma Gem, Stars",

author = "Z. Yi and O. Elgaroy and O. Engvold and Westergaard, {Niels J{\o}rgen Stenfeldt}",

year = "1997",

language = "English",

volume = "318",

pages = "791--796",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

number = "3",

}

TY - JOUR

T1 - ROSAT observations of the RSCVn binary sigma Geminorum

AU - Yi, Z.

AU - Elgaroy, O.

AU - Engvold, O.

AU - Westergaard, Niels Jørgen Stenfeldt

PY - 1997

Y1 - 1997

N2 - X-ray observations of the RSCVn system sigma Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.

AB - X-ray observations of the RSCVn system sigma Geminorum have been undertaken with the ROSAT observatory. Several spectra of very good signal-to-noise ratio were obtained. Spectral fitting using metal abundances amounting to 50% of solar values reveal two temperature components at 2 MK and 12 MK. Previous EXOSAT observations showed another component at 40 MK. Particular interest is focused on the temporal variations of the X-ray emission. It is found that variations occur on time scales ranging from years to hours and minutes.

KW - X-rays

KW - Coronae

KW - Stars sigma Gem

KW - Stars

M3 - Journal article

SN - 0004-6361

VL - 318

SP - 791

EP - 796

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

ROSAT observations of the RSCVn binary sigma Geminorum

Abstract

Keywords

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