Results 101 to 110 of about 1,006,206 (194)

Hidden Companions to Intermediate-mass Stars. XIX. Spin–Orbit Misalignment and a 0.26M _⊙, 1.8 au Companion in the Astrometric Binary Gamma Trianguli Australis*

Research Notes of the AAS
Abstract Gamma Trianguli Australis is a nearby A-type star that was reported to be a 488 days astrometric binary in Gaia DR3. Here we report on a VLTI/GRAVITY observation of γ TrA in which we did not detect the companion down to a K band flux ratio of 0.5%. From the isochrone mass M A
Idel Waisberg, Ygal Klein, Boaz Katz
openaire   +1 more source

Detection and Astrometry of the Ba–Bb Subsystem in α Piscium: First Dual-field Interferometry at the CHARA Array

The Astronomical Journal
We present the first on-sky demonstration of dual-field interferometry at the Center for High Angular Resolution Astronomy (CHARA) Array and the first direct resolution of the inner Ba–Bb subsystem in the bright hierarchical triple α Piscium.
Narsireddy Anugu, Robert Klement, John D. Monnier, Douglas R. Gies, Gail H. Schaefer, Stefan Kraus, Sebastián Carrazco-Gaxiola, Akshat S. Chaturvedi, Mayra Gutierrez, Becky Flores, Jeremy Jones, Colin Kane, Rainer Köhler, Karolina Kubiak, Olli W. Majoinen, Nicholas J. Scott, Kayvon Sharifi   +16 more
doaj   +1 more source

Hidden Companions to Intermediate-mass Stars. XXII. Inferring a 0.43M _⊙, 1.65 au Companion in the Astrometric Binary within the Triple System Lambda Muscae*

Research Notes of the AAS
Abstract Lambda Muscae is a nearby A-type star reported as a P = 474 days astrometric binary in Gaia DR3 (and previously in Hipparcos) and which also has a 0.16M ⊙ M dwarf companion at a projected separation 6.4 au discovered by VLT/SPHERE.
Idel Waisberg, Ygal Klein, Boaz Katz
openaire   +1 more source

Unveiling Subarcsecond Multiplicity in the Pleiades with Gaia Multicolor Photometry

The Astronomical Journal
The list of 409 probable cluster members down to G = 15 ^mag ( m ≳ 0.5 M _⊙ ) is compiled for the two degree radius of the Pleiades, based on astrometric data from Gaia DR3 and the PPMXL catalog, along with several radial velocity surveys, including ...
Dmitry Chulkov
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  

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

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

21,864 Unresolved, Low-mass Binaries Identified via Their Overluminosity in Gaia Data Release 3 and a Catalog of 347,440 Systems within 100 pc of the Sun

The Astronomical Journal
The fundamental parameters of a low-mass star can potentially be determined from its photometry and astrometry. This is complicated by the fact that 10%–20% of low-mass stars are predicted to be equal-mass binaries.
Zachary Way, Sébastien Lépine, Jonathan Gagné, Ilija Medan   +3 more
doaj   +1 more source

Joint Observations of PTPS Targets (JOTA)

Astronomy & Astrophysics
Context. The Pennsylvania-Toruń Planet Search, which operates on a sample of ∼1000 northern-hemisphere stars, has been underway since 2004. Stars with radial velocity (RV) amplitudes exceeding 2 km s−1 represent a backup subprogram sample dedicated to ...
Jaros R., Niedzielski A., Ali S., Srivastava D., Sierzputowska J., Adamów M., Lillo-Box J., Orikhovskyi D., Wolszczan A., Villaver E., Pribulla T., Vaňko M.   +11 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