VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000

Details VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000 VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7013e...2w&link_type=abstract

Optical and Infrared Interferometry. Edited by Schöller, Markus; Danchi, William C.; Delplancke, Françoise. Proceedings of the

Physics

Scientific paper

We present interferometric near-infrared observations of the Luminous Blue Variable (LBV) η Car using the Very Large Telescope Interferometer (VLTI) and the AMBER instrument of the European Southern Observatory (ESO). A high spatial resolution of 5 mas (~11.5 AU) and a high spectral resolution R = λ/Δλ=1500 and 12000 were obtained. Some of the data was recorded using the fringe tracker FINITO. The observations were obtained in the wavelength range around both the He I 2.059 μm and the Brγ 2.166 μm emission lines. The AMBER interferograms allow the investigation of the wavelength dependence of η Car's visibility, wavelength-differential phase, and closure phase. If we fit Hillier et al. model visibilities to the observations, we obtain 50% encircled-energy diameters of 4.2, 6.5 and 9.6 mas in the 2.17 μm continuum, the He I, and the Brγ emission lines, respectively. In the continuum, an elongation along a position angle of 120° +/- 15° was derived from the visibilities. The VLTI observations support theoretical models of anisotropic winds from fast-rotating, luminous hot stars with enhanced high-velocity mass loss near the pole.

Affiliated with

Also associated with

No associations

Rating

VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLTI-AMBER observations of Eta Carinae with the FINITO fringe tracker and spectral resolution 12000 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-789132