Results 111 to 120 of about 51,217 (241)
Gaia23ckh: Symbiotic outburst of the assumed Mira variable V390 Sco
Astronomische Nachrichten, Volume 345, Issue 5, June 2024.Abstract The poorly studied variable star V390 Sco, previously classified as a Mira pulsator, was detected in a brightening event by the ESA Gaia satellite in September 2023. This work presents an analysis of available archival multifrequency photometric data of this target, along with our spectroscopic observations. Our findings lead to the conclusion
Jaroslav Merc +7 more
wiley +1 more source
Astronomische Nachrichten, Volume 345, Issue 5, June 2024.Abstract We exploit the astro‐photometric dataset of the multi‐epoch infrared parallel field of a Hubble Space Telescope Large Programme aimed at studying the faintest stars of the globular cluster NGC 6752 to determine the luminosity and mass functions of the multiple stellar populations of this cluster. Thanks to the measurement of proper motions and
Michele Scalco +10 more
wiley +1 more source
The Astrophysical Journal Supplement SeriesHidden within the Gaia satellite’s multiple data releases lies a valuable cache of dark companions. To facilitate the efficient and reliable detection of these companions via combined analyses involving the Gaia, Hipparcos, and Tycho-2 catalogs, we ...
Fabo Feng +3 more
doaj +1 more source
Trigonometric Parallaxes for 1,507 Nearby Mid-to-Late M-dwarfs
, 2013 The MEarth survey is a search for small rocky planets around the smallest, nearest stars to the Sun as identified by high proper motion with red colors. We augmented our planetary search time series with lower cadence astrometric imaging and obtained two
Berta-Thompson, Zachory K. +3 more
core +1 more source
First NACO observations of the Brown Dwarf LHS 2397aB
, 2003 Observations of the standard late type M8 star LHS 2397aA were obtained at the ESO-VLT 8m telescope ``Yepun'' using the NAOS/CONICA Adaptive Optics facility.
Bouy, H. +5 more
core +2 more sources
Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
The Astrophysical JournalWe examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion that Betelgeuse might be a spectroscopic binary.
Morgan MacLeod +12 more
doaj +1 more source
The Initial-to-final Mass Relation of White Dwarfs in Intermediate-separation Binaries
The Astrophysical JournalWe examine the applicability of the initial-to-final mass relation (IFMR) for white dwarfs (WDs) in intermediate-separation binary systems (∼1 au), using astrometric binaries identified in open clusters from Gaia DR3.
Oren Ironi +3 more
doaj +1 more source
A purely geometric distance to the binary star Atlas, a member of the Pleiades
, 2004 We present radial velocity and new interferometric measurements of the double star Atlas, which permit, with the addition of published interferometric data, to precisely derive the orbital parameters of the binary system and the masses of the components.
Debernardi, Y. +6 more
core +1 more source
Three-dimensional Orbit and Dynamical Masses of GJ 105 AC
The Astrophysical JournalThe precision of stellar models is higher than the precision at which we are able to measure the masses of most stars, with the notable exception of binaries where we can determine dynamical masses of the component stars.
Cayla M. Dedrick +13 more
doaj +1 more source
Astrometric radial velocities. I. Non-spectroscopic methods for measuring stellar radial velocity
, 1999 High-accuracy astrometry permits the determination of not only stellar tangential motion, but also the component along the line-of-sight. Such non-spectroscopic (i.e.
Dravins, Dainis +2 more
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