Near-UV nebular absorption lines of η Carinae
نویسندگان
چکیده
منابع مشابه
Variable Unidentified Emission Near 6307 Å in η Carinae
We have discovered a conspicuous unidentified variable feature near 6307 Å in the spectrum of η Carinae which is spatially unresolved from the central star and its wind (r . 200–300 AU). It is significant for two reasons: such prominent unidentified lines are now rare in this object, and this feature varies strongly and systematically. It exhibits a combination of characteristics which, so far ...
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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...
متن کاملThe periodicity of the η Carinae events ⋆ † ‡
Extensive spectral observations of η Carinae over the last cycle, and particularly around the 2003.5 low excitation event, have been obtained. The variability of both narrow and broad lines, when combined with data taken from two earlier cycles, reveal a common and well defined period. We have combined the cycle lengths derived from the many lines in the optical spectrum with those from broad-b...
متن کاملConstraining the orbital orientation of η Carinae from H Paschen lines
During the past decade several observational and theoretical works provided evidences of the binary nature of η Carinae. Nevertheless, there is still no direct determination of the orbital parameters, and the different current models give contradictory results. The orbit is, in general, assumed to coincide with the Homunculus equator although the observations are not conclusive. Among all syste...
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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 ...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 2003
ISSN: 0074-1809
DOI: 10.1017/s0074180900211996