R. Klement
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View article: Precise Age For The Binary HD 21278 In The Young Alpha Persei Cluster
Precise Age For The Binary HD 21278 In The Young Alpha Persei Cluster Open
We present a study of the double-lined spectroscopic binary HD 21278 that contains one of the brightest main sequence stars in the young $α$ Persei open cluster. We analyzed new spectra and reanalyzed archived spectra to measure precise ne…
View article: VLTI/GRAVITY enables the determination of the first dynamical masses of a classical Be + stripped and bloated pre-subdwarf binary
VLTI/GRAVITY enables the determination of the first dynamical masses of a classical Be + stripped and bloated pre-subdwarf binary Open
HR~6819 is the first post-mass transfer binary system composed of a classical Be star and a bloated pre-subdwarf stripped star directly confirmed by interferometry. While the Be star is already spun up to near-critical rotation and possess…
View article: Classical Be stars
Classical Be stars Open
Classical Be stars, the "e" standing for the presence of spectroscopic line emission, are main sequence stars of spectral type B that are able to form a gaseous disk in Keplerian motion from star-ejected matter. The main driver of this cap…
View article: Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster
Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster Open
We report long-baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 2838…
View article: Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster
Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster Open
We report long baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 2838…
View article: Three-dimensional orbit of AC Her determined: Binary-induced truncation cannot explain the large cavity in this post-AGB transition disk
Three-dimensional orbit of AC Her determined: Binary-induced truncation cannot explain the large cavity in this post-AGB transition disk Open
Some evolved binaries, namely post-asymptotic giant branch binaries, are surrounded by stable and massive circumbinary disks similar to protoplanetary disks found around young stars. Around 10% of these disks are transition disks: they hav…
View article: Precise Age for the Binary Star System 12 Com in the Coma Berenices Cluster
Precise Age for the Binary Star System 12 Com in the Coma Berenices Cluster Open
We present measurements of the interferometrically-resolved binary star system 12 Com and the single giant star 31 Com in the cluster Coma Berenices. 12 Com is a double-lined spectroscopic binary system consisting of a G7 giant and an A3 d…
View article: Gamma Cas Stars as Be + White Dwarf Binary Systems
Gamma Cas Stars as Be + White Dwarf Binary Systems Open
The origin of the bright and hard X-ray emission flux among the gamma Cas subgroup of B-emission line (Be) stars may be caused by gas accretion onto an orbiting white dwarf (WD) companion. Such Be+WD binaries are the predicted outcome of a…
View article: The Orbits and Dynamical Masses of the Castor System
The Orbits and Dynamical Masses of the Castor System Open
Castor is a system of six stars in which the two brighter objects, Castor A and B, revolve around each other every $\sim$450 yr and are both short-period spectroscopic binaries. They are attended by the more distant Castor C, which is also…
View article: The Interferometric Binary Epsilon Cancri in Praesepe: Precise Masses and Age
The Interferometric Binary Epsilon Cancri in Praesepe: Precise Masses and Age Open
We observe the brightest member of the Praesepe cluster, Epsilon Cancri, to precisely measure the characteristics of the stars in this binary system, en route to a new measurement of the cluster's age. We present spectroscopic radial veloc…