Results 51 to 60 of about 215 (139)

CO Second Overtone Line Variability in Three Carbon-rich Early Post–Asymptotic Giant Branch Stage Stars

The Astrophysical Journal
Near-infrared CO molecular lines are suggested to be linked with dynamic processes in post–asymptotic giant branch (post-AGB) stars; however, they have not been investigated at high spectral resolution.
Kārlis Puķītis
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Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury

The Astrophysical Journal
Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilizing estimates of host cluster properties to constrain stellar physical parameters.
Richard Smith, Avi Patel, Monika D. Soraisam, Puragra Guhathakurta, Pranav Tadepalli, Sally Zhu, Joseph Liu, Léo Girardi, L. Clifton Johnson, Sagnick Mukherjee, Knut A. G. Olsen, Benjamin F. Williams   +11 more
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Publication Only

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

ALMA’s Sharpest View of IRAS 08544–4431: Unveiling the Dust Distribution Asymmetries in the Circumbinary Disk

The Astrophysical Journal
The interactions between post–asymptotic giant branch (post-AGB) binaries and their circumbinary disks play a central role in shaping the evolution of these systems.
Maksym Mohorian, Devika Kamath, Elizabeth Cappellazzo, Kateryna Andrych, Jacques Kluska, Hans Van Winckel, Daniel Price, Toon De Prins, Arancha Castro-Carrizo, Javier Alcolea, Nicolás Cuello, Matthias Fabry, Valentin Bujarrabal   +12 more
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Gaia Barium Dwarfs and Their Ostensibly Ordinary Counterparts

The Astrophysical Journal Letters
The recently identified Gaia population of main-sequence–white dwarf (MS+WD) binaries at separations of ∼1 au, often with moderate eccentricities, is not readily reproduced by binary population synthesis models.
Param Rekhi, Sahar Shahaf, Sagi Ben-Ami, Na’ama Hallakoun, Johanna Müller-Horn, Silvia Toonen, Hans-Walter Rix   +6 more
doaj   +1 more source

Discovery of an Extremely Luminous Type II Cepheid in the Andromeda Giant Stellar Stream: Evidence for a Hierarchical Triple with an Inner Binary Merger

The Astrophysical Journal Letters
We report the discovery of LAMOST J0041+3948, the most luminous post-asymptotic giant-branch (AGB) Type II Cepheid known, located in the Andromeda Giant Stellar Stream.
Pinjian Chen, Bingqiu Chen, Xiaodian Chen, Haibo Yuan, Jianrong Shi, Shu Wang, Chunqian Li, Jiyu Wang, Jianxing Zhang, Yi Ren   +9 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

A Deficit of Massive White Dwarfs in Gaia Astrometric Binaries

The Astrophysical Journal Letters
The third data release of Gaia introduced a large catalog of astrometric binaries, out of which about 3200 are likely main-sequence stars with a white dwarf (WD) companion.
Na’ama Hallakoun, Sahar Shahaf, Tsevi Mazeh, Silvia Toonen, Sagi Ben-Ami   +4 more
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Observations of the Halo Star HD 177566

The Astrophysical Journal
We have analyzed archival far-ultraviolet (FUV) and optical spectra of the hot halo star HD 177566. The star has an effective temperature T _eff = 33,000 ± 1000 K, surface gravity $\mathrm{log}g=3.79\pm 0.11$ , and helium abundance $\mathrm{log}N({\rm{He}
William V. Dixon, Pierre Chayer
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CO observations in rotating circumbinary post-AGB disks

Astronomy & Astrophysics
Context. There is a group of post-asymptotic giant branch (post-AGB) stars that are part of a binary system and that show a significant infrared excess.
Gallardo Cava I., Alcolea J., Van Winckel H., Bujarrabal V., Santander-García M., Gómez-Garrido M.   +5 more
doaj   +1 more source