Results 21 to 30 of about 736 (237)

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

The Astrophysical Journal, 2023
The stellar companion to the weak-line T Tauri star DI Tau A was first discovered by the lunar occultation technique in 1989 and was subsequently confirmed by a speckle imaging observation in 1991.
Shih-Yun Tang, Asa G. Stahl, L. Prato, G. H. Schaefer, Christopher M. Johns-Krull, Brian A. Skiff, Charles A. Beichman, Taichi Uyama   +7 more
doaj   +1 more source

Visual binary stars with known orbits in Gaia EDR3

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT A total of 3350 objects from the Sixth Catalog of Orbits of Visual Binary Stars (ORB6) are investigated to validate Gaia Early Data Release 3 (EDR3) parallaxes and provide mass estimates for the systems. We show that two-thirds of binaries with a separation of 0.2–0.5 arcsec are left without a parallax solution in EDR3.
Dmitry Chulkov, Oleg Malkov
openaire   +2 more sources

VIBES: Visual Binary Exoplanet survey with SPHERE

, 2020
Context. Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries.
C. Fontanive, R. Jayawardhana, Kuhn, J., Reggiani, M., Quanz, S.P., S. P. Quanz, J. Kühn, Daemgen, S., M. Meyer, Engler, N., N. Engler, Meyer, M., Hagelberg, J., S. Daemgen, Fontanive, C., M. Reggiani, V. Kostov, Quanz, S. P., J. Hagelberg, Jayawardhana, R., Kostov, V.   +20 more
core   +1 more source

Visual Binary Stars with Known Orbits in Gaia DR3 [PDF]

, 2023
Визуальные двойные звезды с известными орбитами используются для исследования каталога Gaia DR3. Показано, что 2/3 решений с угловым расстоянием между компонентами 0.2—0.5 имеют 2-параметрическое решение, не содержащее параллаксов. Выявлено 16 оптических
Чулков, Д. А., Chulkov, D. A.
core  

PG 1018−047: the longest period subdwarf B binary [PDF]

, 2012
About 50 per cent of all known hot subdwarf B stars (sdBs) reside in close (short‐period) binaries, for which common‐envelope ejection is the most likely formation mechanism. However, Han et al.
Wade, Richard A., Copperwheat, C.M., Heber, U., Morales-Rueda, Luisa, Deca, J., Stark, M. A., Marsh, T. R., Maxted, P. F. L., Copperwheat, Chris M., Maxted, Pierre F.L., Morales-Rueda, L., Wade, R.A., Nelemans, Gijs, Marsh, Thomas R., Copperwheat, C. M., Ostensen, Roy, Deca, Jan, Stark, M.A., Nelemans, G., Maxted, P.F.L., Wade, R. A., Østensen, R.H., Marsh, T.R., Stark, Michelle A., Heber, Uli, Nelemans, G.A., Morales‐rueda, L., Østensen, R. H.   +27 more
core   +1 more source

Statistical Analysis of a Comprehensive List of Visual Binaries

Open Astronomy, 2015
Visual binary stars are the most abundant class of observed binaries. The most comprehensive list of data on visual binaries compiled recently by cross-matching the largest catalogues of visual binaries allowed a statistical investigation of ...
Kovaleva D., Malkov O., Yungelson L., Chulkov D., Yikdem G. M.   +4 more
doaj   +1 more source

On-sky demonstration of a linear band-limited mask with application to visual binary stars [PDF]

, 2010
We have designed and built the first band-limited coronagraphic mask used for ground-based high-contrast imaging observations. The mask resides in the focal plane of the near-infrared camera PHARO at the Palomar Hale telescope and receives a well ...
Carson, J., Serabyn, E., Kravchenko, I., Ge, J., Crepp, J.   +4 more
core   +1 more source

Spectroscopic Orbits of Subsystems in Multiple Stars. XI

The Astronomical Journal
Adding to the large radial velocity survey of nearby solar-type stars (summary in Tokovinin, 2023a), spectroscopic orbits are determined for four hierarchical systems: HIP 49442 (inner and outer periods of 164.55 days and 34 yr, respectively), HIP 55691 (
Andrei Tokovinin
doaj   +1 more source

Deciphering transcriptional plasticity in pancreatic ductal adenocarcinoma reveals alterations in sensory neuron innervation

Molecular Oncology, EarlyView.
Pancreatic sensory neurons innervating healthy and PDAC tissue were retrogradely labeled and profiled by single‐cell RNA sequencing. Tumor‐associated innervation showed a dominant neurofilament‐positive subtype, altered mitochondrial gene signatures, and reduced non‐peptidergic neurons.
Elena Genova, Michele Montrone, Uday Rangaswamy, Francesco Diversi, Irene Schiavo, Denise Ferrarini, Roberta Di Florio, Irene Longo, Michele Coscia, Nicola Zamboni, Giorgia Demontis, Lisa Veghini, Vincenzo Corbo, Remo Sanges, Paul Heppenstall   +14 more
wiley   +1 more source

Orbits of Twelve Multiple Stars

The Astronomical Journal
Inner and outer orbits in 12 hierarchical stellar systems are determined using high-resolution speckle imaging, radial velocities, or both. Masses and fluxes of the components are estimated. The Hipparcos numbers of the main stars are 7111, 12912, 17895,
Andrei Tokovinin
doaj   +1 more source