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Mostrando ítems 11-20 de 700
A double plateau and unprecendented circumstellar variable sodium in the transient SN 2011A
(International Astronomical Union, 2013)
We present optical photometry and spectrosopy of the transient SN 2011A. Our
data spans 140 days after discovery including BVRIu’g’r’i’z’ photometry and a sequence of 11
spectra. First classified as a type IIn supernova ...
Searching for light echoes due to circumstellar matter in SNe la Spectra
(The American Astronomical Society, 2015)
We present an analytical model for light echoes (LEs) coming from circumstellar material (CSM) around Type Ia Supernovae (SNe Ia). Using this model we find two spectral signatures at 4100 angstrom and 6200 angstrom that ...
The circumstellar envelope of IRC+10216 from milli-arcsecond to arcmin scales
(Astronomy & Astrophysics, 2006-07-31)
Structure and Composition of Two Transitional Circumstellar Disks in Corona Australis
(2010)
The late stages of evolution of the primordial circumstellar disks surrounding young stars are poorly understood, yet vital to constrain theories of planet formation. We consider basic structural models for the disks around ...
The close circumstellar environment of Betelgeuse II. Diffraction-limited spectro-imaging from 7.76 to 19.50 mu m with VLT/VISIR
(EDP SCIENCES S A, 2011)
Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the enrichment of the interstellar medium in dust and molecules. The physical mechanism of this mass loss is however relatively poorly known. ...