UNDERSTANDING THE X-RAY FLARING FROM η CARINAE
نویسندگان
چکیده
منابع مشابه
Hard X - ray emission from η Carinae
Context. If relativistic particle acceleration takes place in colliding-wind binaries, hard X-rays and γ-rays are expected through inverse Compton emission, but to date these have never been unambiguously detected. Aims. To detect this emission, observations of η Carinae were performed with INTEGRAL, leveraging its high spatial resolution. Methods. Deep hard X-ray images of the region of η Car ...
متن کاملThe CHANDRA HETGS X-ray Grating Spectrum of η Carinae
η Carinae may be the most massive and luminous star in the Galaxy and is suspected to be a massive, colliding wind binary system. The CHANDRA X-ray observatory has obtained a calibrated, high-resolution X-ray spectrum of the star uncontaminated by the nearby extended soft X-ray emisssion. Our 89 ksec CHANDRA observation with the High Energy Transmission Grating Spectrometer (HETGS) shows that t...
متن کاملHigh velocity structures in , and the X - ray emission from the LBV nebula around η Carinae
The Luminous Blue Variable star η Carinae is one of the most massive stars known. It underwent a giant eruption in 1843 in which the Homunculus nebula was created. ROSAT and ASCA data indicate the existence of a hard and a soft X-ray component which appear to be spatially distinct: a softer diffuse shell of the nebula around η Carinae and a harder point-like source centered on the star η Car. A...
متن کاملPrecession and Nutation in the η Carinae binary system: Evidences from the X-ray light curve
It is believed that η Carinae is actually a massive binary system, with the wind-wind interaction responsible for the strong X-ray emission. Although the overall shape of the X-ray light curve can be explained by the high eccentricity of the binary orbit, other features like the asymmetry near periastron passage and the short quasi-periodic oscillations seen at those epochs, have not yet been a...
متن کاملSubmillimetre emission from η Carinae
We present critical, long-wavelength observations of η Carinae in the submillimetre using SCUBA on the JCMT at 850 and 450 μm to confirm the presence of a large mass of warm dust around the central star. We fit a two-component blackbody to the IR-submm spectral energy distribution (SED) and estimate between 0.3− 0.7 M⊙ of dust exists in the nebula depending on the dust absorption properties and...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/707/1/693