Results 91 to 100 of about 1,478 (224)
The Effect of Viscosity on the Temperature of Ae Star Disks
GalaxiesThis study explores the impact of viscous heating on decretion disks around Classical Ae (CAe) stars, with a focus on modeling the disk’s thermal structure.
R. Anusha, T. A. A. Sigut
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, 2006 Aims.We perform a study of the structure, density, and distribution of ionized circumstellar gas in the strongly interacting binary SX Cas. Methods.We apply our new model codes for electron scattering in circumstellar matter to analyze a ...
V. Piirola +4 more
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The Astronomical JournalScattered light imaging of protoplanetary disks provides key insights on the geometry and dust properties in the disk surface. Here, we present James Webb Space Telescope (JWST) 2–21 μ m images of a 1000 au radius edge-on protoplanetary disk surrounding ...
Gaspard Duchêne +8 more
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Multi-dimensional models of circumstellar shells around evolved massive stars
, 2012 Context. Massive stars shape their surrounding medium through the force of their stellar winds, which collide with the circumstellar medium. Because the characteristics of these stellar winds vary over the course of the evolution of the star, the ...
A. J. van Marle, R. Keppens
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The Energy Sources, the Physical Properties, and the Mass-loss History of SN 2017dio
The Astrophysical JournalWe study the energy sources, the physical properties of the ejecta and the circumstellar medium (CSM), and the mass-loss history of the progenitor of SN 2017dio, which is a broad-lined Ic (Ic-BL) supernova (SN) having unusual light curves (LCs) and ...
Deng-Wang Shi +3 more
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Supernovae, by Chandra and XMM-Newton
UniverseX-ray emission from supernovae can arise from multiple interactions during their evolution. The immediate explosion is sufficiently energetic to generate X-rays; so, too, is the impact of the shock as it runs into circumstellar matter from earlier mass ...
Eric M. Schlegel
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Models of bright nickel-free supernovae from stripped massive stars with circumstellar shells [PDF]
, 2018 The nature of an emerging class of rapidly fading supernovae (RFSNe) – characterized by their short-lived light-curve duration, but varying widely in peak brightness – remains puzzling.
Kleiser, Io K. W. +5 more
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The Astrophysical JournalInteraction between supernova (SN) ejecta and dense circumstellar medium (CSM) with a flat density structure ( ρ ∝ r ^− ^s , s < 1.5) was recently proposed as a possible mechanism behind interacting SNe that exhibit exceptionally long rise times ...
Ryotaro Chiba, Takashi J. Moriya
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Spectroscopic diagnosis of extended circumstellar regions about early type stars
, 2019 Nela Dvořáková 19.7.2019 1 Abstract We study a representative of a diverse group of stars exhibiting the B[e] phe- nomenon, designated MWC 939. This object might be an important link be- tween the stage of the asymptotic giant branch and planetary nebula
Dvořáková, Nela
core
THE PROGENITOR OF SN 2011ja: CLUES FROM CIRCUMSTELLAR INTERACTION
, 2013 Massive stars, possibly red supergiants, which retain extended hydrogen envelopes until core collapse, produce Type II plateau (IIP) supernovae. The ejecta from these explosions shocks the circumstellar matter originating from the mass loss of the ...
Ryder, Stuart +9 more
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