Results 81 to 90 of about 1,478 (224)
Limitations of the modified blackbody fit method for determining molecular cloud properties
Astronomische Nachrichten, Volume 345, Issue 4, May 2024.Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley +1 more source
The Astronomical JournalThe carrier of the 21 μ m emission feature discovered in a handful of protoplanetary nebulae (PPNe) is one of the most intriguing enigmas in circumstellar chemistry.
Jian-Jie Qiu +9 more
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The circumstellar matter in the Be + K binary KX and seen in the uv spectra [PDF]
Symposium - International Astronomical Union, 1987 KX And (HD 218393) belongs to well-known and often observed Be stars. The periodicity of spectroscopic characteristics as well as other observations led to the conclusion that the star is a peculiar interacting binary (Harmanec et al. 1980). The aim of this paper is to present the phase-dependent behaviour of the UV spectrum of the star.
openaire +1 more source
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
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Journal of Social Philosophy, Volume 55, Issue 4, Page 624-642, Winter 2024.
Luke Moffett
wiley +1 more source
The circumstellar disk response to the motion of the host star [PDF]
, 2017 Context. Grid-based hydrodynamics simulations of circumstellar disks are often performed in the curvilinear coordinate system, in which the center of the computational domain coincides with the motionless star.
Regály, Zsolt +3 more
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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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Detection of C60 in circumstellar environments
, 2016 Buckminsterfullerene (C60) was recently discovered in the infrared spectra of a series of circumstellar envelopes. Given their remarkable stability, C60 and its derivatives are presumably able to survive during the envelope dispersion into the ...
Zhang, Y
core
Modeling of interactions between supernovae ejecta and aspherical circumstellar environments
, 2019 Context. Massive stars are characterized by a significant loss of mass either via (nearly) spherically symmetric stellar winds or pre-explosion pulses, or by aspherical forms of circumstellar matter (CSM) such as bipolar lobes or outflowing circumstellar
P. Kurfürst, J. Krtička
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The Astrophysical Journal LettersCircumstellar interaction of supernova (SN) ejecta is an essential process in its evolution, and observations of SNe have found the signature of circumstellar interaction in both the early and late evolutionary phases of SNe. In this Letter, we show that
Tomoki Matsuoka +2 more
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