The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet

STELZER, Beate, Swetlana HUBRIG, S. ORLANDO, G. MICELA, Zdeněk MIKULÁŠEK a M. SCHÖLLER. The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet. Astronomy and Astrophysics. Les Ulis Cedex, France: EDP Sciences, 2009, roč. 2009, č. 499, s. 529-533, 4 s. ISSN 0004-6361.

Základní údaje

Originální název

The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet

Název česky

The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet

Autoři

STELZER, Beate (380 Itálie), Swetlana HUBRIG (276 Německo), S. ORLANDO (380 Itálie), G. MICELA (380 Itálie), Zdeněk MIKULÁŠEK (703 Slovensko, garant) a M. SCHÖLLER (276 Německo)

Vydání

Astronomy and Astrophysics, Les Ulis Cedex, France, EDP Sciences, 2009, 0004-6361

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Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Francie

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 4.179

Kód RIV

RIV/00216224:14310/09:00035658

Organizační jednotka

Přírodovědecká fakulta

UT WoS

000266730500017

Klíčová slova česky

X-rays: stars; accretion; accretion disks; stars: pre-main sequence; stars: variables: general; stars: activity; stars: winds; outflows

Klíčová slova anglicky

X-rays: stars; accretion; accretion disks; stars: pre-main sequence; stars: variables: general; stars: activity; stars: winds; outflows

Štítky

accretion, accretion disks, outflows, stars: activity, stars: pre-main sequence, stars: variables: general, stars: winds, X-rays: stars

Příznaky

Mezinárodní význam, Recenzováno

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Anotace

V originále

We observed the FUor object Z CMa during optical outburst and quiescence with Chandra. No significant changes in X-ray brightness and spectral shape were found, suggesting that the X-ray emission is coronal. The binary nature of Z CMa makes the origin of the X-ray source ambiguous. However, the moderate hydrogen column density derived from our data makes it unlikely that the embedded primary star is the X-ray source. The secondary star, which is the FUor object, is thus responsible for both the X-ray emission and the ongoing accretion outburst, which seem, however, to be unrelated phenomena. The secondary is also known to drive a large outflow and jet, which we detect here for the first time in X-rays. The distance of the X-ray emitting outflow source to the central star is greater than in jets of low-mass stars.

Česky

We observed the FUor object Z CMa during optical outburst and quiescence with Chandra. No significant changes in X-ray brightness and spectral shape were found, suggesting that the X-ray emission is coronal. The binary nature of Z CMa makes the origin of the X-ray source ambiguous. However, the moderate hydrogen column density derived from our data makes it unlikely that the embedded primary star is the X-ray source. The secondary star, which is the FUor object, is thus responsible for both the X-ray emission and the ongoing accretion outburst, which seem, however, to be unrelated phenomena. The secondary is also known to drive a large outflow and jet, which we detect here for the first time in X-rays. The distance of the X-ray emitting outflow source to the central star is greater than in jets of low-mass stars.