Results 81 to 90 of about 1,046,866 (182)

Visual Orbits of Wolf–Rayet Stars. I. The Orbit of the Dust-producing Wolf–Rayet Binary WR 137 Measured with the CHARA Array

The Astrophysical Journal
Classical Wolf–Rayet (W-R) stars are the descendants of massive OB stars that have lost their hydrogen envelopes and are burning helium in their cores prior to exploding as Type Ib/c supernovae.
Noel D. Richardson, Gail H. Schaefer, Jan J. Eldridge, Rebecca Spejcher, Amanda Holdsworth, Ryan M. Lau, John D. Monnier, Anthony F. J. Moffat, Gerd Weigelt, Peredur M. Williams, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Sorabh Chhabra, Isabelle Codron, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm   +21 more
doaj   +1 more source

Interferometric observations of the circumstellar disk environments in close binary stars

, 2018
The inner structure of protoplanetary disks can be strongly affected by the presence of the companion in close binary stars with ~au separation, where the dispersal of the circumstellar components may occur over time scales as short as 10000 yrs. The interferometric view helps us to understand better the disk-binary interaction in such systems.
openaire   +2 more sources

Binary Stars Take What They Get: Evidence for Efficient Mass Transfer from Stripped Stars with Rapidly Rotating Companions

The Astrophysical Journal Letters
Binary stars and their interactions shape the formation of compact binaries, supernovae, and gravitational-wave sources. The efficiency of mass transfer—the fraction of mass retained by the accretor during binary interaction—is a critical parameter that ...
Thibault Lechien, Selma E. de Mink, Ruggero Valli, Amanda C. Rubio, Lieke A. C. van Son, Robert Klement, Harim Jin, Onno Pols   +7 more
doaj   +1 more source

Evidence for an Accretion Bridge in the DX Cha Circumbinary System from VLTI/MATISSE Observations

The Astrophysical Journal
DX Cha (HD 104237) is a spectroscopic binary consisting of a Herbig A7.5Ve–A8Ve primary star and a K3-type companion. Here we report on new 3.55 μ m interferometric observations of this source with the Multi Aperture Mid-Infrared Spectroscopic Experiment
Tímea Juhász, József Varga, Péter Ábrahám, Ágnes Kóspál, Foteini Lykou, Lei Chen, Attila Moór, Fernando Cruz-Sáenz de Miera, Bruno Lopez, Alexis Matter, Roy van Boekel, Michiel Hogerheijde, Margaux Abello, Jean-Charles Augereau, Paul Boley, William C. Danchi, Thomas Henning, Mathis Letessier, Jie Ma, Philippe Priolet, Marten Scheuck, Gerd Weigelt, Sebastian Wolf   +22 more
doaj   +1 more source

Interferometric view into RT Pav’s long secondary period

Astronomy & Astrophysics
Context. Long secondary periods (LSPs) occur in roughly one third of evolved stars, yet their origin remains uncertain. Two leading hypotheses are oscillatory convective modes and a binary companion enshrouded in dust. Aims. We investigate the LSP in the
Courtney-Barrer B., Haubois X., Wood P., Dionese D., Decin L., Paladini C., El Mellah I., Defrère D., Ireland M.   +8 more
doaj   +1 more source

The period distribution of close binary systems

, 1979
The analysis of the period distribution of eclipsing and spectroscopic binary systems shows the presence of some secondary maxima, which cannot depend on selection effects. These secondary maxima are mainly due to late type stars, as can be seen from the
Farinella P., PAOLICCHI, PAOLO, Mantegazza L., Luzny F.   +3 more
core  

Which is the most eccentric binary known? Insights from the 2023/4 pericenter passages of Zeta Boötis and Eta Ophiuchi

The Open Journal of Astrophysics
There is a clear dearth of very eccentric binaries among those for which individual eccentricities can be measured. In this paper we report on observations of the two nearby, bright and very eccentric visual binaries Zeta Bo\"otis ($\zeta$ Boo) and Eta ...
Idel Waisberg, Ygal Klein, Boaz Katz
doaj   +1 more source

A Test of FeH Line Parameters Using DR19 APOGEE Spectra of Benchmark M Dwarfs

The Astrophysical Journal
Recent studies have suggested a mismatch of up to 0.20 dex between iron abundances derived from Fe I and FeH lines in the H -band spectra of M dwarfs and in this work we investigate the nature of this possible offset.
Anderson Silva-Andrade, Diogo Souto, Katia Cunha, Verne V. Smith, Carlos Allende Prieto, Ricardo P. Schiavon, Verónica Loaiza-Tacuri, Aida Behmard, Dmitry Bizyaev, Ilija Medan, Dan Qiu, Bárbara Rojas-Ayala   +11 more
doaj   +1 more source

The Triple System V1371 Tau: An Eclipsing Binary with an Outer Be Star

The Astrophysical Journal
Although triple systems are common, their orbital dynamics and stellar evolution remain poorly understood. We investigated the V1371 Tau system using TESS photometry, multiepoch spectroscopy, and recent interferometric data, confirming it as a rare ...
Danilo F. Rocha, Marcelo Emilio, Jonathan Labadie-Bartz, Coralie Neiner, Julia Bodensteiner, Tomer Shenar, Laerte Andrade, Michael Abdul-Masih, Felipe Navarete, Alessandro Melo, Eduardo Janot-Pacheco, Romualdo Eleutério, Alan W. Pereira   +12 more
doaj   +1 more source

Shaping the Outflows of Binary AGB Stars

, 2015
The required conditions for stars to evolve into planetary nebulae (PNe) continue to puzzle. Since PNe are found in a wide variety of shapes, processes that could sculpt circumstellar envelopes (CSEs) are being investigated.
Mohamed, Shazrene,, Ramstedt, Sofia,, Vlemmings, Wouter H. T.,   +2 more
core   +1 more source