Results 101 to 110 of about 17,929 (222)
The Astrophysical Journal LettersWe report C, N, Si, and Al–Mg isotope data for 39 presolar X silicon carbide (SiC) and four silicon nitride grains—a group of presolar grains that condensed in the remnants of core-collapse Type II supernovae (CCSNe)—isolated from the Murchison meteorite.
Nan Liu +5 more
doaj +1 more source
Fifteen years of “Sonderforschungsbereich” in Heidelberg: Research on circumstellar matter [PDF]
Symposium - International Astronomical Union, 1987 At the end of this year, the Sonderforschungsbereich (Special Collaborative Programme) no. 132 on “Theoretical and Observational Stellar Astronomy” in Heidelberg will terminate after fifteen years. Although 15 years are only 2 1/2 per cent of the age of the University of Heidelberg, which is celebrating its 600 th anniversary this year, they are ...
openaire +1 more source
Supernova Resonance-Scattering Profiles in the Presence of External Illumination
, 1999 We discuss a simple model for the formation of a supernova spectral line by resonance scattering in the presence of external illumination of the line-forming region by light from circumstellar interaction (toplighting).
Blaylock, M. +3 more
core +2 more sources
Journal of Social Philosophy, Volume 55, Issue 4, Page 624-642, Winter 2024.
Luke Moffett
wiley +1 more source
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
doaj +1 more source
Constraints on gamma-ray burst and supernova progenitors through circumstellar absorption lines
, 2005 Long gamma-ray bursts are thought to be caused by a subset of exploding Wolf-Rayet stars. We argue that the circumstellar absorption lines in early supernova and in gamma-ray burst afterglow spectra may allow us to determine the main properties of the ...
Garcia-Segura, Guillermo +2 more
core +1 more source
Circumstellar matter studied by spectrally-resolved interferometry
, 2012 This paper describes some generalities about spectro-interferometry and the role it has played in the last decade for the better understanding of circumstellar matter. I provide a small history of the technique and its origins, and recall the basics of differential phase and its central role for the recent discoveries.
openaire +3 more sources
Recent and Future Studies of Circumstellar Matter – A Snapshot [PDF]
Symposium - International Astronomical Union, 1999 At this meeting, powerful new images and spectroscopy of AGB stars were presented. Theoretical models have advanced, and we are learning more from studies of the pre-solar grains isolated from meteorites.We suggest that several mass loss mechanisms may be operating in AGB stars: current images imply both spherical winds and highly flattened outflows ...
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Grain growth in newly discovered young eruptive stars
, 2020 FU Orionis-type stars are young stellar objects showing large outbursts due to highly enhanced accretion from the circumstellar disk onto the protostar.
Carmona, A. +6 more
core +3 more sources
SN 2024abvb: A Type Icn Supernova in the Outskirts of Its Host Galaxy
The Astrophysical JournalWe present multiband photometric and spectroscopic observations of supernova (SN) 2024abvb, which exhibits early-time prominent photoionized narrow emission lines of C II superposed on a blue continuum.
Maokai Hu +13 more
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