Resolving X-ray sources from B stars spectroscopically:: The example of μ Leporis

被引：9

作者：

Behar, E ^{[1
]}

Leutenegger, M

Doron, R

Güdel, M

Feldman, U

Audard, M

Kahn, SM

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[3] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[4] Paul Scherrer Inst, CH-5303 Wurenlingen, Switzerland

[5] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[6] Artep Inc, Ellicott City, MD 21042 USA

[7] Stanford Linear Accelerator Ctr, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA

来源：

ASTROPHYSICAL JOURNAL | 2004年 / 612卷 / 01期

基金：

以色列科学基金会;

关键词：

stars : activity; stars : chemically peculiar; stars : coronae; stars : pre-main-sequence; X-rays : stars;

D O I：

10.1086/424485

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present high-resolution X-ray observations of the chemically peculiar late-type B star mu Lep. However, we find spectroscopic and astrometric evidence, which shows that the X-rays are not traced back to the B star itself but rather to a previously unresolved companion, mu Lep-B, whose X-ray spectrum resembles that of a coronally active source. We discuss the possibility that mu Lep-B is a pre-main-sequence companion, most likely of the nonaccreting magnetically active type.

引用

页码：L65 / L68

页数：4

共 17 条

[1] THE RELATION BETWEEN ROTATIONAL VELOCITIES AND SPECTRAL PECULIARITIES AMONG A-TYPE STARS [J].

ABT, HA ;

MORRELL, NI .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1995, 99 (01) :135-172

[2]

Adelman SJ, 2000, ASTRON ASTROPHYS, V354, P899

[3] The Chandra iron-L X-ray line spectrum of Capella [J].

Behar, E ;

Cottam, J ;

Kahn, SM .

ASTROPHYSICAL JOURNAL, 2001, 548 (02) :966-975

[4] The ROSAT all-sky survey catalogue of optically bright OB-type stars [J].

Berghofer, TW ;

Schmitt, JHMM ;

Cassinelli, JP .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1996, 118 (03) :481-494

[5] First light measurements with the XMM-Newton reflection grating spectrometers:: Evidence for an inverse first ionisation potential effect and anomalous Ne abundance in the Coronae of HR 1099 [J].

Brinkman, AC ;

Behar, E ;

Güdel, M ;

Audard, M ;

den Boggende, AJF ;

Branduardi-Raymont, G ;

Cottam, J ;

Erd, C ;

den Herder, JW ;

Jansen, F ;

Kaastra, JS ;

Kahn, SM ;

Mewe, R ;

Paerels, FBS ;

Peterson, JR ;

Rasmussen, AP ;

Sakelliou, I ;

de Vries, C .

ASTRONOMY & ASTROPHYSICS, 2001, 365 (01) :L324-L328

[6] An inquiry into the nature of spectra from hot astrophysical plasma abnormally enriched with mercury [J].

Doron, R ;

Feldman, U ;

Doschek, GA ;

Bar-Shalom, A .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2002, 139 (01) :297-312

[7] High-energy processes in young stellar objects [J].

Feigelson, ED ;

Montmerle, T .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1999, 37 :363-408

[8] X-rays in the Orion Nebula Cluster: Constraints on the origins of magnetic activity in pre-main-sequence stars [J].

Feigelson, ED ;

Gaffney, JA ;

Garmire, G ;

Hillenbrand, LA ;

Townsley, L .

ASTROPHYSICAL JOURNAL, 2003, 584 (02) :911-930

[9] INTERPRETATION OF SOLAR HELIUM-LIKE ION LINE INTENSITIES [J].

GABRIEL, AH ;

JORDAN, C .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1969, 145 (02) :241-&

[10] Search for low-mass PMS companions around X-ray selected late B stars [J].

Hubrig, S ;

Le Mignant, D ;

North, P ;

Krautter, J .

ASTRONOMY & ASTROPHYSICS, 2001, 372 (01) :152-164

← 1 2 →