منابع مشابه
First AU-scale observations of V1647 Orionis with VLTI/MIDI
The young eruptive star V1647 Ori was observed with MIDI, the mid-infrared interferometric instrument at the Very Large Telescope Interferometer (VLTI), on March 2, 2005. We present the first spectrally resolved interferometric visibility points for this object. Our results show that (1) the mid-infrared emitting region is extended, having a size of ≈7 AU at 10 μm; (2) no signatures of a close ...
متن کاملVLTI / AMBER and VLTI / MIDI spectro - interferometric observations of the B [ e ] supergiant CPD − 57 ◦ 2874 ⋆
We present the first high spatial and spectral observations of the circumstellar envelope (CSE) of a B[e] supergiant (CPD−57◦ 2874), performed with the Very Large Telescope Interferometer (VLTI). Spectra, visibilities, and closure phase, were obtained using the beam-combiner instruments AMBER (near-IR interferometry with three 8.3 m Unit Telescopes or UTs) and MIDI (mid-IR interferometry with t...
متن کاملar X iv : a st ro - p h / 06 05 38 2 v 1 1 6 M ay 2 00 6 To appear in ApJ FU Orionis - The MIDI / VLTI Perspective
We present the first mid-infrared interferometric measurements of FU Orio-nis. We clearly resolve structures that are best explained with an optically thick accretion disk. A simple accretion disk model fits the observed SED and visibili-ties reasonably well and does not require the presence of any additional structure such as a dusty envelope. The inclination and also the position angle of the...
متن کاملCalibration of MIDI , the Mid - infrared Interferometer for the VLTI
Calibration of MIDI, the Mid-infrared Interferometer for the VLTI MIDI is the MID-infrared Interferometric Instrument at the Very Large Telescope Interferometer (VLTI). It will perform long-baseline stellar interferometry in the N band (8. . . 13 μm). In the run-up of setting up MIDI, some preparatory tasks had to be solved concerning the calibration of the instrument in the laboratory. Being a...
متن کاملThe Unusual X-ray Spectrum of FU Orionis
FU Orionis objects (FUors) have undergone strong optical outbursts and are thought to be young low-mass stars accreting at high rates of up to Ṁacc ∼ 10 −4 M⊙ yr . FUors have been extensively studied at optical and infrared wavelengths, but little is known about their X-ray properties. We have thus initiated a program aimed at searching for and characterizing their X-ray emission. First results...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2006
ISSN: 0004-637X,1538-4357
DOI: 10.1086/505857