Results 101 to 110 of about 3,169 (205)

Effects of Metallicity on Graphite, TiC, and SiC Condensation in Carbon Stars

The Astrophysical Journal
From transmission electron microscopy and other laboratory studies of presolar grains, the implicit condensation sequence of carbon-bearing condensates in circumstellar envelopes of carbon stars is (from first to last) TiC-graphite-SiC.
Gabrielle M. Adams, Katharina Lodders
doaj   +1 more source

Observations of the circumstellar gas shells around Betelgeuse and Antares

The Astrophysical Journal, 1975
Results are presented on the direct observations of the circumstellar shell around alpha-Ori, along with new observations of the Ca II infrared triplet lines which provide lower limits for the Ca(+) shell radii for alpha-Ori and alpha-Sco (Antares). The 8542-A line in alpha-Ori does not show a circumstellar absorption core, and the shell radius limit ...
A. P. Bernat, D. L. Lambert
openaire   +1 more source

Spectroscopic Identification and Photochemistry of Astrochemically Relevant Phosphorus-bearing Molecules [O, C, N, P] and [2O, C, N, P]

The Astrophysical Journal
Diatomic molecules phosphorus monoxide (PO) and phosphorus mononitride (PN) are the main reservoirs of gas-phase phosphorus in interstellar and circumstellar environments, indicating the possibility of forming new phosphorus-bearing molecules through ...
Bifeng Zhu, Minghao Wang, Junjie Jiang, Ningjing Jiang, Jingling Hong, Guntram Rauhut, Guanjun Wang, Weixing Li, Xiaoqing Zeng   +8 more
doaj   +1 more source

Ring-gap Structures in the Class I Circumstellar Disk of CrA IRS 2 Associated with the Magnetic Flux-driven Bubble

The Astrophysical Journal
Recent Atacama Large Millimeter/submillimeter Array (ALMA) observations with 0 $\mathop{.}\limits^{^{\prime\prime} }$ 1 resolution have revealed characteristic substructures in circumstellar disks around young Class I sources, providing clues to the ...
Ayumu Shoshi, Masayuki Yamaguchi, Mitsuki Omura, Kazuki Tokuda, Naofumi Fukaya, Kengo Tachihara, Masahiro N. Machida   +6 more
doaj   +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

Diagnostics of circumstellar gas in Algol-type binaries

, 1992
В статье дается обзор наблюдаемых особенностей и анализ физических условий в околозвездном газе в полуразделенных двойных системах типа Алголя. Показано, что основные кинематические и морфологические свойства околозвездных и околосистемных газовых сред ...
Пустыльник, И.Б.
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OH-IR stars. I. Physical properties of circumstellar envelopes [PDF]

, 1976
A theoretical model of the circumstellar envelope which surrounds a OH-IR star is developed. The circumstellar gas is ejected by radiation pressure which acts on dust grains that condense in the atmosphere of the central star.
Scoville, Nick, Goldreich, Peter
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Accretion and Outflow in Orion-KL Source I

The Astrophysical Journal
We present Atacama Large Millimeter/submillimeter Array observations of SiO, SiS, H _2 O, NaCl, and SO line emission at ∼30–50 mas resolution. These images map the molecular outflow and disk of Orion Source I (SrcI) on ∼12–20 au scales.
Melvyn Wright, Brett A. McGuire, Adam Ginsburg, Tomoya Hirota, John Bally, Ryan Hwangbo, T. Dex Bhadra, Chris John, Rishabh Dave   +8 more
doaj   +1 more source

A Radiative Instability in Post-shock-cooling Circumstellar Gas

, 2001
Investigations on non-LTE radiative heating and cooling processes behind shock waves in circumstellar environments have revealed the existence of a radiative/thermal instability in the post-shock cooling gas.
Schirrmacher, V., Sedlmayr, E., Woitke, P.   +2 more
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Beta Pic-like Circumstellar Gas Disk Around 2 And

, 2003
This grant was awarded to support the data analysis and publication of results from our project entitled P Pic-like Circumstellar Gas Disk Around 2 And .
Cheng, Patricia
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