Zobrazeno 1 - 10
of 12 523
pro vyhledávání: '"agb and post-agb"'
Autor:
Suh, Kyung-Won
We investigate the properties of AGB and post-AGB (PAGB) stars, planetary nebulae, and young stellar objects (YSOs) in our Galaxy through an analysis of observational data covering visual and infrared (IR) wavelengths. Utilizing datasets from IRAS, 2
Externí odkaz:
http://arxiv.org/abs/2407.20540
Autor:
Konstantinova-Antova, Renada, Georgiev, Stefan, Lèbre, Agnès, Charbonnel, Corinne, Palacios, Ana, Aurière, Michel
During the last decade and a half, the new generation spectropolarimeter Narval at Pic du Midi, France allowed the study of weak magnetic fields in cool giant stars that are fairly evolved after main sequence. We present a short summary on the recent
Externí odkaz:
http://arxiv.org/abs/2407.17421
Akademický článek
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Akademický článek
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Autor:
Vlemmings, Wouter
There is ample evidence for strong magnetic fields in the envelopes of (Post-)Asymptotic Giant Branch (AGB) stars as well as supergiant stars. The origin and role of these fields are still unclear. This paper updates the current status of magnetic fi
Externí odkaz:
http://arxiv.org/abs/1903.05353
We present the results of our search for low- and intermediate mass evolved stars in the outer Galaxy using AllWISE catalogue photometry. We show that the [3.4]-[12] versus [4.6]-[22] colour-colour diagram is most suitable for separating C-rich/O-ric
Externí odkaz:
http://arxiv.org/abs/1612.09118
Autor:
Suh, Kyung-Won
We present various infrared two-color diagrams (2CDs) for AGB stars, post-AGB stars, and Planetary Nebulae (PNe) and investigate possible evolutionary tracks. We use catalogs from the available literature for the sample of 4903 AGB stars (3373 O-rich
Externí odkaz:
http://arxiv.org/abs/1506.05176
Context: Ground-state OH maser emission from late-type stars is usually polarized and remains a powerful probe of the magnetic field structure in the outer regions of circumstellar envelopes if observed with high angular and spectral resolutions. Obs
Externí odkaz:
http://arxiv.org/abs/1110.0773
We present AKARI/IRC observations of a sample of six extremely red IRAS sources, of which three are variable OH/IR stars and the rest are early post-AGB stars. The OH/IR stars show a red continuum with the expected strong 10 micron silicate absorptio
Externí odkaz:
http://arxiv.org/abs/0904.4134
The AKARI and Spitzer satellites provided an unique opportunity to observe a variety of stars, which are considered as departing from the Asymptotic Giant Branch (AGB) and have started their post-AGB evolution recently. Most of these stars are absent
Externí odkaz:
http://arxiv.org/abs/0904.3958