Zobrazeno 1 - 10
of 2 936
pro vyhledávání: '"Circumstellar shells"'
The progenitors of Type Ia supernovae (SNe Ia) are debated, particularly the evolutionary state of the binary companion that donates mass to the exploding carbon-oxygen white dwarf. In previous work, we presented hydrodynamic models and optically thi
Externí odkaz:
http://arxiv.org/abs/2102.11885
We have imaged over 35 years of archival Very Large Array (VLA) observations of the nearby (d$_{\rm{L}}$ $=$ 3.15 Mpc) Type Ia supernovae SN\,1972E and SN\,1895B between 9 and 121 years post-explosion. No radio emission is detected, constraining the
Externí odkaz:
http://arxiv.org/abs/2001.03558
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. Whether the RFSNe arise from low-mass thermonuclear eruptions on w
Externí odkaz:
http://arxiv.org/abs/1801.01943
Autor:
Hoai, Do Thi, Nhung, Pham Thi, Gérard, Eric, Matthews, Lynn D., Villaver, Eva, Bertre, Thibaut Le
We present HI line profiles for various models of circumstellar shells around red giants. In the calculations we take into account the effect of the background at 21 cm, and show that in some circumstances it may have an important effect on the shape
Externí odkaz:
http://arxiv.org/abs/1503.01256
For decades, a wide variety of observations spanning the radio through optical and on to the x-ray have attempted to uncover signs of type Ia supernovae (SNe Ia) interacting with a circumstellar medium (CSM). The goal of these studies is to constrain
Externí odkaz:
http://arxiv.org/abs/1604.00019
We present near-IR spectroscopic observations of the central sources in 17 circumstellar shells from a sample of more than 400 "bubbles" discovered in the Spitzer/MIPSGAL 24um survey of the Galactic plane and in the Cyg-X region. To identify these sh
Externí odkaz:
http://arxiv.org/abs/1405.4023
Autor:
Moriya, Takashi J., Blinnikov, Sergei I., Baklanov, Petr V., Sorokina, Elena I., Dolgov, Alexander D.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 430, Issue 2, p.1402-1407 (2013)
We numerically investigate light curves (LCs) of shocked circumstellar shells which are suggested to reproduce the observed LC of superluminous SN 2006gy analytically. In the previous analytical model, the effects of the recombination and the bolomet
Externí odkaz:
http://arxiv.org/abs/1301.0355
Autor:
Burgemeister, Sonja, Gvaramadze, Vasilii V., Stringfellow, Guy S., Kniazev, Alexei Y., Todt, Helge, Hamann, Wolf-Rainer
Publikováno v:
Monthly Notices of the Royal Astronomical Society, December 2012
Two optically obscured Wolf-Rayet (WR) stars have been recently discovered by means of their infrared (IR) circumstellar shells, which show signatures of interaction with each other. Following the systematics of the WR star catalogues, these stars ob
Externí odkaz:
http://arxiv.org/abs/1212.3727
Recent observations of luminous Type IIn supernovae (SNe) provide compelling evidence that massive circumstellar shells surround their progenitors. In this paper we investigate how the properties of such shells influence the SN lightcurve by conducti
Externí odkaz:
http://arxiv.org/abs/1004.2791
We present numerical simulations of the hydrodynamical interactions that produce circumstellar shells. These simulations include several scenarios, such as wind-wind interaction and wind-ISM collisions. In our calculations we have taken into account
Externí odkaz:
http://arxiv.org/abs/1110.3144