Results 101 to 110 of about 1,478 (224)

Constraints on Circumstellar Material Around the Type Ia Supernova 2007af(1,2)

, 2007
Patat et al. recently inferred the existence of circumstellar material around a normal Type Ia supernova (SN Ia) for the first time, finding time-variable Na I D absorption lines in the spectrum of SN 2006X. We present high-resolution spectroscopy of the
Penprase, Bryan E., Beeler, Daniel J., Allende Prieto, Carlos, Gal-Yam, Avishay, Li, Weidong, Quimby, Robert M., Wheeler, J. Craig, Silverman, Jeffrey M., Patat, Ferdinando, Simon, Joshua D., Prieto, Carlos Allende, Martinez, Irene T., Filippenko, Alexei V.   +12 more
core   +1 more source

Searching for New Objects with the B[e] Phenomenon

Galaxies
Objects with the B[e] phenomenon, whose defining features are the presence of forbidden emission lines and infrared excess coming from circumstellar dust, represent a broad range of evolutionary stages from pre-main-sequence to planetary nebulae.
Aisha Zh. Naurzbayeva, Nazgul Sh. Alimgazinova, Anatoly S. Miroshnichenko, Corinne Rossi, Inna V. Reva, Raushan I. Kokumbayeva, Chingis T. Omarov, Sergei V. Zharikov, Nadine Manset, Ashish Raj, Arti Joshi, Richard J. Rudy, Richard C. Puetter, Raleigh B. Perry, Kunduz M. Turekhanova   +14 more
doaj   +1 more source

Massive stars: the pre-supernova evolution of internal and circumstellar structure

, 1998
We review new developments in the theory of massive stars and their circumstellar environments, considering the evolution from the main sequence to the supernova explosion.
Heger, A. (Max-Planck-Institut fuer Astrophysik, Garching (Germany)), Garcia-Segura, G. (Universidad Nacional Autonoma de Mexico, Mexico City (Mexico). Inst. de Astronomia), Langer, N. (Potsdam Univ. (Germany). Inst. fuer Physik), Max-Planck-Institut fuer Astrophysik, Garching (Germany)   +3 more
core  

Constraints on gamma-ray burst and supernova progenitors through circumstellar absorption lines : II. Post-LBV Wolf-Rayet stars

, 2007
Van Marle et al. (2005) showed that circumstellar absorption lines in early Type Ib/c supernova and gamma-ray burst afterglow spectra may reveal the progenitor evolution of the exploding Wolf-Rayet star. While the quoted paper deals with Wolf-Rayet stars
A. J. van Marle, G. García-Segura, Astrophysics, van Marle, Allard Jan, Garcia-Segura, G., N. Langer, Afd Astrophysics begr 1/1/17, Langer, N., Marle, A.J.   +8 more
core   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

The Continuum Re-processing Efficiency of Be Star Circumstellar Disks

, 2007
We have calculated the total flux emitted in Hff, Pff, and Brff by the circumstellar envelope of both an early Be star, fl Cas, and a late Be star, 1 Delphini, assuming the central star is the only source of energy input into the circumstellar envelope ...
Millar Sigut And, T. A. A. Sigut, J. M. Marlborough, C. E. Millar   +3 more
core  

Diagnosis of Circumstellar Matter Structure in Interaction-powered Supernovae with Hydrogen Line Features

The Astrophysical Journal
Some supernovae (SNe) are powered by the collision of the SN ejecta with dense circumstellar matter (CSM). Their emission spectra show characteristic line shapes of combined broad emission and narrow P Cygni lines, which should closely relate to the CSM ...
Ayako T. Ishii, Yuki Takei, Daichi Tsuna, Toshikazu Shigeyama, Koh Takahashi   +4 more
doaj   +1 more source

Spectroscopy of the growing circumstellar disk in the

, 2003
We present the results of a spectroscopic monitoring program of the binary system δ Scorpii, whose primary became a Be star after the last periastron encounter in the Summer of 2000.
N. D. Morrison, K. S. Bjorkman, C. Buil, H. Levato, E. Pollmann, J. P. Wisniewski, A. S. Miroshnichenko, D. C. Knauth, N. Manset, M. Grosso   +9 more
core   +1 more source

Origin of the Strong Sodium Absorption of the Lensed Supernova 2016geu at z = 0.4

The Astrophysical Journal
The origin of strong sodium absorption, which has been observed for a few nearby Type Ia supernovae (SNe Ia), remains elusive. Here we analyze two high-signal-to-noise, intermediate-resolution Very Large Telescope/X-shooter spectra at epochs +18 and +27 ...
Christa Gall, Jens Hjorth, Lise Christensen, Luca Izzo, Paolo A. Mazzali, Mark M. Phillips, Peter Hoeflich, Charlotte Angus, Cecilie Cold, Jonatan Selsing   +9 more
doaj   +1 more source

A Century of Studies of the Object with the B[e] Phenomenon HD 50138

Galaxies
HD 50138 is a 6.6 mag emission-line B–type star, whose nature is still controversial. It has been thought to be a pre-main-sequence Herbig Be star and an evolved object with the B[e] phenomenon, possibly a mass-transferring binary system. However, it has
Holly Buroughs, Anatoly S. Miroshnichenko, Steve Danford, Alicia N. Aarnio, Sergei V. Zharikov, Hans Van Winckel, Nadine Manset, Ashish Raj, Stephen Drew Chojnowski, Gregor Rauw, Azamat A. Khokhlov   +10 more
doaj   +1 more source