Intense radio outburst from the supermassive star Eta Carinae

1995 ◽  
Vol 441 ◽  
pp. L73 ◽  
Author(s):  
R. A. Duncan ◽  
S. M. White ◽  
J. Lim ◽  
G. J. Nelson ◽  
S. A. Drake ◽  
...  
Keyword(s):  
Eta Carinae ◽  
Radio Outburst ◽  
Intense Radio

Stimulated Amplification under Spatially Nonhomogeneous Conditions: An Astrophysical Fe II Laser in the Vicinity of Eta Carinae

2005 ◽  
Vol T120 ◽  
pp. 99-104
Author(s):  
S Johansson ◽  
V Letokhov
Keyword(s):  
Eta Carinae

A radio jet associated with the symbiotic star CH Cygni

1986 ◽  
Vol 64 (4) ◽  
pp. 520-522 ◽  
Author(s):  
E. R. Seaquist ◽  
A. R. Taylor
Keyword(s):  
Electron Density ◽  
White Dwarf ◽  
Transverse Velocity ◽  
Stellar Object ◽  
Symbiotic Star ◽  
Ionized Gas ◽  
Radio Outburst ◽  
Supercritical Accretion ◽  
End To End ◽  
Red Giant

We present observations that show that the symbiotic star CH Cygni recently underwent a strong radio outburst that produced a radio-emitting thermal jet. The jet is two-sided and is expanding lengthwise at an observed rate (end to end) of 1 arcsec/year, corresponding to a transverse velocity of 1100 km∙s−1 in each direction. The electron density on January 22, 1985 exceeded 2 × 106 cm−3, and the mass of the (ionized) gas exceeded [Formula: see text]. The emergence of the jet coincided with a decline in the visual luminosity of [Formula: see text].The data are consistent with a jet produced by supercritical accretion in a binary containing a red giant and a [Formula: see text] white dwarf. The discovery of a jet in such a system provides confirming evidence of the role played by accretion in determining the optical and radio properties of this system. It is also the first expanding jet found to be associated with an evolved stellar object.

scholarly journals Effects of fast rotation on the wind of Luminous Blue Variables

2010 ◽  
Vol 6 (S272) ◽  
pp. 56-61
Author(s):  
Jose H. Groh
Keyword(s):  
Near Infrared ◽  
Rotational Velocity ◽  
Spectral Lines ◽  
High Resolution Spectroscopy ◽  
Luminous Blue Variables ◽  
Eta Carinae ◽  
Fast Rotation ◽  
Long Baseline ◽  
Infrared Interferometry ◽  
Fast Rotating

AbstractWhile theoretical studies have long suggested a fast-rotating nature of Luminous Blue Variables (LBVs), observational confirmation of fast rotation was not detected until recently. Here I discuss the diagnostics that have allowed us to constrain the rotational velocity of LBVs: broadening of spectral lines and latitude-dependent variations of the wind density structure. While rotational broadening can be directly detected using high-resolution spectroscopy, long-baseline near-infrared interferometry is needed to directly measure the shape of the latitude-dependent photosphere that forms in a fast-rotating star. In addition, complex 2-D radiative transfer models need to be employed if one's goal is to constrain rotational velocities of LBVs. Here I illustrate how the above methods were able to constrain the rotational velocities of the LBVs AG Carinae, HR Carinae, and Eta Carinae.

On the binarity of Eta Carinae

Massive Stars ◽  
2010 ◽  
pp. 116-125
Author(s):  
Theodore. R. Gull
Keyword(s):  
Eta Carinae

scholarly journals Accretion at the periastron passage of Eta Carinae

2016 ◽  
Vol 464 (1) ◽  
pp. 775-782 ◽  
Author(s):  
Amit Kashi
Keyword(s):  
Eta Carinae

Die Riesen unter den Sonnen: Betelgeuze Pistolenstern und Eta Carinae

1998 ◽  
pp. 112-117
Author(s):  
Daniel Fischer ◽  
Hilmar Duerbeck
Keyword(s):  
Eta Carinae

scholarly journals Cobalt in Eta Carinae

1976 ◽  
Vol 174 (1) ◽  
pp. 59P-62P
Author(s):  
A. D. Thackeray
Keyword(s):  
Eta Carinae

scholarly journals DETECTION OF GAMMA-RAY EMISSION FROM THE ETA-CARINAE REGION

2009 ◽  
Vol 698 (2) ◽  
pp. L142-L146 ◽  
Author(s):  
M. Tavani ◽  
S. Sabatini ◽  
E. Pian ◽  
A. Bulgarelli ◽  
P. Caraveo ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Eta Carinae ◽  
Gamma Ray Emission

scholarly journals First Results of Eta Carinae Observations with H.E.S.S. II

2017 ◽  
Author(s):  
Eva Leser ◽  
Stefan Ohm ◽  
Matthias Füßling ◽  
Mathieu de Naurois ◽  
Kathrin Egberts ◽  
...  
Keyword(s):  
Eta Carinae ◽  
First Results

scholarly journals Note on eta Carinae

1915 ◽  
Vol 8 ◽  
pp. 134-134
Author(s):  
R. F. Sanford
Keyword(s):  
Eta Carinae
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