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[PDF] Top 20 X-Ray Emission from Massive Stars in Cyg OB2

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X-Ray Emission from Massive Stars in Cyg OB2

X-Ray Emission from Massive Stars in Cyg OB2

... X-ray emission is a well-known property of massive stars of spectral type earlier than about ...this emission is gener- ally attributed to a distribution of hydrodynamic shocks ... Voir le document complet

28

The X-ray emission of the massive stars population in Cyg OB2

The X-ray emission of the massive stars population in Cyg OB2

... Owocki et al. (2013) proposed that L X of O-stars should scale as (Ṁ/v ∞ ) 1-m where theory predicts m ~ 0.2 – 0.4. We have tested this relation on our data (see Fig. 2), finding i.e. a slightly shallower ... Voir le document complet

1

X-ray study of bow shocks in runaway stars

X-ray study of bow shocks in runaway stars

... ABSTRACT Massive runaway stars produce bow shocks through the interaction of their winds with the interstellar medium, with the prospect for particle acceleration by the ...non-thermal emission. Our ... Voir le document complet

15

Discovery of X-Ray Emission from Young Suns in the Small Magellanic Cloud

Discovery of X-Ray Emission from Young Suns in the Small Magellanic Cloud

... gas in the N 90 H ii region demon- strated it to be nearly quiescent (Nigra et ...explosion in the cluster 16 ...general massive star population in the SMC’s ...Galactic stars due to ... Voir le document complet

12

X-ray emission from interacting wind massive binaries: A review of 15 years of progress

X-ray emission from interacting wind massive binaries: A review of 15 years of progress

... 444 Cyg also displays a spectacular modulation in the soft band ...intrinsic X-ray ...peak in the soft band. The shift of the soft emission peak with respect to conjunction time ... Voir le document complet

20

The crucial role of high resolution X-ray spectroscopy in studies of massive stars and their winds

The crucial role of high resolution X-ray spectroscopy in studies of massive stars and their winds

... O stars and early B stars are known to be X-ray emitters, typically with L X /L bol ∼ 10 −7 , but in some cases significantly ...more. X-rays are generated in ... Voir le document complet

9

XMM-Newton observations of the Cyg OB2 association

XMM-Newton observations of the Cyg OB2 association

... obtained in the near infrared: Kn¨ odlseder (2000) analysed 2MASS data of Cyg OB2 finding that the cluster probably harbours about 2600 ± 400 OB stars among which 120 ± 20 ...that Cyg ... Voir le document complet

4

X-ray spectroscopy of stars

X-ray spectroscopy of stars

... Non-degenerate stars of essentially all spectral classes are soft X-ray ...Their X-ray spectra have been important in constraining physical processes that heat plasma in ... Voir le document complet

98

XMM-Newton observations of the massive colliding wind binary and non-thermal radio emitter Cyg OB2#8A [O6If+O5.5III(f)]

XMM-Newton observations of the massive colliding wind binary and non-thermal radio emitter Cyg OB2#8A [O6If+O5.5III(f)]

... rates from our XMM-Newton observa- tions, along with those from archive ROSAT-PSPC and ASCA- PSPC observations, with the ephemeris given by De Becker et ...the X- ray flux of about 20 % ... Voir le document complet

15

A binary signature in the non-thermal radio-emitter Cyg OB2 #9

A binary signature in the non-thermal radio-emitter Cyg OB2 #9

... of Cyg OB2 #9 has been going on since ...companion in an eccentric ...derived from radio measurements and the line splitting corresponds to the minimum emission in the ra- dio ... Voir le document complet

4

Studying massive stars with the International X-ray Observatory

Studying massive stars with the International X-ray Observatory

... 3.2 Massive binary systems The interactions of stellar winds in massive binary systems can produce a strong X-ray emission due to the heating of the winds in the ... Voir le document complet

6

CHARACTERIZING X-RAY AND RADIO EMISSION IN THE BLACK HOLE X-RAY BINARY V404 CYGNI DURING QUIESCENCE

CHARACTERIZING X-RAY AND RADIO EMISSION IN THE BLACK HOLE X-RAY BINARY V404 CYGNI DURING QUIESCENCE

... – stars: black holes – stars: individual (V404 Cyg) – X-rays: binaries ...Low-mass X-ray binaries (LMXBs) are systems containing a compact object, either a black hole (BH) or a ... Voir le document complet

11

Can massive Be/Oe stars be progenitors of long gamma ray bursts?

Can massive Be/Oe stars be progenitors of long gamma ray bursts?

... of stars that can undergo the WR phase, according to Yoon et ...most massive B- type stars, as well as O-type stars, could become WR stars if they rotated fast ...Oe/Be stars. ... Voir le document complet

13

The 2.35 year itch of Cygnus OB2 #9. I. Optical and X-ray monitoring

The 2.35 year itch of Cygnus OB2 #9. I. Optical and X-ray monitoring

... the Cyg OB2 association, one of the richest OB associations of our Galaxy since it contains about one hundred O-stars ( Knödlseder 2000 ; Negueruela et ...association, Cyg OB2 #9 is ... Voir le document complet

14

Spectroscopy of Massive Stars

Spectroscopy of Massive Stars

... constant X-ray output (Feldmeier et al. 1997). In addition, a supple- mentary X-ray emission may result from other mechanisms, which are not necessarily present in ... Voir le document complet

42

Massive Be and Oe stars at low metallicity and long gamma ray bursts

Massive Be and Oe stars at low metallicity and long gamma ray bursts

... al.: Massive SMC Be/Oe stars and LGRBs 2. Be stars in low metallicity environment The Be-phenomenon concerns the main se- quence OBA-type stars, which spectrum has displayed at least ... Voir le document complet

7

X-Ray Emission from Magnetic Massive Stars

X-Ray Emission from Magnetic Massive Stars

... objects in the sample, the reduced χ 2 of the best-fit are sometimes larger than 2, hence are formally not ...even in these cases, the fitting was good in the ...problems in such cases ... Voir le document complet

31

Wind collisions in three massive stars of Cygnus OB2

Wind collisions in three massive stars of Cygnus OB2

... object Cyg OB2 #5 The object Cyg OB2 #5 has long been known to be an eclips- ing binary, but it was recently found to be a quadruple system ( Kennedy et ...of Cyg OB2 #5 is a ... Voir le document complet

14

X-ray emission of interacting wind binaries in Cyg OB2

X-ray emission of interacting wind binaries in Cyg OB2

... Abstract. Cyg OB2 #5, #8A, and #9 are binary or multiple massive stars in the Cyg OB2 association displaying several peculiarities, such as bright X-ray ... Voir le document complet

2

X-ray emission of interacting wind binaries in Cyg OB2

X-ray emission of interacting wind binaries in Cyg OB2

... X-ray emission of interacting wind binaries in Cyg OB2 Yaël Nazé, Constantin Cazorla, & Gregor Rauw ...Abstract Cyg OB2 #5, #8A, and #9 are binary or multiple ... Voir le document complet

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