First detection of x-ray variability of eta carinae
نویسندگان
چکیده
منابع مشابه
Early Chandra X-ray Observations of Eta Carinae
Sub-arcsecond resolution Chandra observations of η Car reveal a 40 × 70 ring or partial shell of X-ray emission surrounding an unresolved, bright, central source. The spectrum of the central source is strongly absorbed and can be fit with a high-temperature thermal continuum and emission lines. The surrounding shell is well outside the optical/IR bipolar nebula and is coincident with the Outer ...
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We present the results of extensive observations by the gamma-ray AGILE satellite of the Galactic region hosting the Carina nebula and the remarkable colliding wind binary Eta Carinae (η Car) during the period 2007 July – 2009 January. We detect a gamma-ray source (1AGL J1043-5931) consistent with the position of η Car. If 1AGL J1043-5931 is associated with the Car system our data provide the l...
متن کاملUsing X-ray Observations to Explore the Binary Interaction in Eta Carinae
We study the usage of the X-ray light curve, column density toward the hard X-ray source, and emission measure (density square times volume), of the massive binary system η Carinae to determine the orientation of its semi-major axis. The source of the hard X-ray emission is the shocked secondary wind. We argue that, by itself, the observed X-ray flux cannot teach us much about the orientation o...
متن کاملThe Systemic Velocity of Eta Carinae
High-resolution spectra of molecular hydrogen in the Homunculus nebula allow for the first direct measurement of the systemic velocity of η Carinae. Near-infrared longslit data for H2 1-0 S(1) λ21218 obtained with the Phoenix spectrometer on the Gemini South telescope give Vsys=−8.1±1 km s −1 (heliocentric), or VLSR=−19.7±1 km s , from the average of the near and far sides of the Homunculus. Th...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1995
ISSN: 0004-637X,1538-4357
DOI: 10.1086/187904