Results 51 to 60 of about 9,884 (228)
Studying Asymptotic Giant Branch Stars in the JWST Era
Universe, 2020 We explore the potential offered by the incoming launch of the James Webb Space Telescope, to study the stars evolving through the asymptotic giant branch (AGB) phase. To this aim we compare data of AGB stars in the Large Magellanic Cloud, taken with the
Paolo Ventura +3 more
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Properties of the Variation of the Infrared Emission of OH/IR Stars III. The M Band Light Curves [PDF]
Journal of Astronomy and Space Sciences, 2010 To study properties of the pulsation in the infrared emission for long period variables, we have collected and analyzed the infrared observational data at M band for 12 OH/IR stars.
Young-Joo Kwon, Kyung-Won Suh
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Backflow in post-asymptotic giant branch stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2001 We derive the conditions for a backflow toward the central star(s) of circumstellar material to occur during the post-asymptotic giant branch (AGB) phase. The backflowing material may be accreted by the post-AGB star and/or its companion, if such exists.
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Magnetic Flares on Asymptotic Giant Branch Stars [PDF]
The Astrophysical Journal, 2003 We investigate the consequences of magnetic flares on the surface of asymptotic giant branch (AGB) and similar stars. In contrast to the solar wind, in the winds of AGB stars the gas cooling time is much shorter than the outflow time. As a result, we predict that energetic flaring will not inhibit, and may even enhance, dust formation around AGB stars.
Soker, Noam, Kastner, Joel H.
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Optical Spectropolarimetry of Asymptotic Giant Branch and Post–Asymptotic Giant Branch Stars
The Astrophysical Journal, 2006 Spectropolarimetric observations are presented for 21 AGB stars, 13 proto-planetary nebulae (PPNs), and two R CrB-type stars. The spectra cover the wavelength range from ~4200 to 8400 A with 16 A resolution. Among the AGB stars, 8 of 14 M giants, five of six carbon stars, and zero of one S star showed intrinsic polarization.
John H. Bieging +3 more
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Fluorine Production in Asymptotic Giant Branch Stars [PDF]
Symposium - International Astronomical Union, 2000 The present status of our understanding of fluorine production in asymptotic giant branch stars is reviewed, and future perspectives are presented.
N. Mowlavi, A. Jorissen, M. Arnould
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An Empirical formula for the mass-loss rates of dust-enshrouded red supergiants and oxygen-rich asymptotic giant branch stars [PDF]
, 2005 We present an empirical determination of the mass-loss rate as a function of stellar luminosity and effective tem- perature, for oxygen-rich dust-enshrouded Asymptotic Giant Branch stars and red supergiants.
J. V. Loon +3 more
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Rubidium and zirconium abundances in massive Galactic asymptotic giant branch stars revisited [PDF]
, 2017 Luminous Galactic OH/IR stars have been identified as massive (>4-5 M_s) AGB stars experiencing HBB and Li production. Their Rb abundances and [Rb/Zr] ratios derived from hydrostatic model atmospheres, are significantly higher than predictions from AGB ...
V. Pérez-Mesa +10 more
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Pulsating stars in the VMC survey
EPJ Web of Conferences, 2017 The VISTA survey of the Magellanic Clouds system (VMC) began observations in 2009 and since then, it has collected multi-epoch data at Ks and in addition multi-band data in Y and J for a wide range of stellar populations across the Magellanic system ...
Cioni Maria-Rosa L. +6 more
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Pulsating post-asymptotic giant branch stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1993 Numerical stability analyses of envelopes of post-asymptotic giant branch stars show instabilities towards radial pulsations over a broad range of effective temperatures, although only stars with sufficiently high luminosity-to-mass ratios and high enough iron abundances are excited.
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