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We present spectroscopic and photometric solutions for three spotted systems with red giant components. Absolute physical and orbital parameters for these double-lined detached eclipsing binary stars are presented for the first time. These…

We report the first results of our programme to obtain multi-epoch radial velocity measurements of stars with a strong far-UV excess to identify post common-envelope binaries (PCEBs). The targets have been identified using optical…

Solar and Stellar Astrophysics · Physics 2015-05-14 P. F. L. Maxted , B. T. Gaensicke , M. R. Burleigh , J. Southworth , T. R. Marsh , R. Napiwotzki , G. Nelemans , P. L. Wood

We present a new set of radial-velocity measurements of the spectroscopic binary HD 165052 obtained by disentangling of high-resolution optical spectra. The longitude of the periastron (60 +- 2 degrees) shows a variation with respect to…

Solar and Stellar Astrophysics · Physics 2015-06-15 G. Ferrero , R. Gamen , O. G. Benvenuto , E. Fernández-Lajús

Detached eclipsing binaries are the primary tool used to measure precise masses and radii of stars. In our previous paper estimating the parameters of more than 30,000 detached eclipsing binaries, we identified 766 eclipsing binaries with…

Solar and Stellar Astrophysics · Physics 2023-01-25 D. M. Rowan , T. Jayasinghe , K. Z. Stanek , C. S. Kochanek , Todd A. Thompson , B. J. Shappee , T. W. -S. Holoien , J. L. Prieto , W. Giles

We present a new optical spectroscopic study of the O-type binary HD 165052 based on high- and intermediate-resolution CCD observations. We re-investigated the spectral classification of the binary components, obtaining spectral types of…

Astrophysics · Physics 2008-11-26 J. I. Arias , N. I. Morrell , R. H. Barba , G. L. Bosch , M. Grosso , M. Corcoran , .

We present the visual orbit of the double-lined spectroscopic binary HD 224355 from interferometric observations with the CHARA Array, as well as an updated spectroscopic analysis using echelle spectra from the Apache Point Observatory 3.5m…

We report the results of our search for pulsating subdwarf B stars in Full Frame Images collected during Year 2 of the TESS mission and covering the northern ecliptic hemisphere. This is a continuation of our effort we presented in Paper I.…

Solar and Stellar Astrophysics · Physics 2021-05-05 A. S. Baran , S. K. Sahoo , S. Sanjayan , J. Ostrowski

We present the results of a radial velocity survey of 20 white dwarf plus M dwarf binaries selected as a follow up to a \textit{Hubble Space Telescope} study that aimed to spatially resolve suspected binaries. Our candidates are taken from…

Solar and Stellar Astrophysics · Physics 2019-01-29 R. P. Ashley , J. Farihi , T. R. Marsh , D. J. Wilson , B. T. Gaensicke

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…

Neutron star (NS) binaries can be potentially intriguing gravitational wave (GW) sources, with both high- and low-frequency radiations from the possibly aspherical individual stars and the binary orbit, respectively. The successful…

High Energy Astrophysical Phenomena · Physics 2024-01-23 Wen-Fan Feng , Jie-Wen Chen , Tan Liu , Yan Wang , Soumya D. Mohanty

This study aims to assess the properties and classification of 40 variable stars in Sagittarius, little studied since their discovery and reported in the Information Bulletin on Variable Stars (IBVS) 985 and update. Using data from previous…

Solar and Stellar Astrophysics · Physics 2021-10-07 G. Agli' , G. Arcomano , G. Bello , V. Bocchino , G. Bruno , C. Carro , M. Charrier , F. Fantino , G. Hu , M. Ricco , M. Ughetto-Monfrin , C. Benna , D. Gardiol , G. Pettiti , -

We collected a total of 4,058 X-ray binary stars, out of which 339 stars had three atmospheric parameters for optical companions from Gaia and LAMOST, while 264 stars had masses and radii of optical companions determined using stellar…

Solar and Stellar Astrophysics · Physics 2023-06-22 Jia Zhang , Sheng-Bang Qian , Guo-Bao Zhang , Xiao Zhou

We present the results of our 2nd radial velocity monitoring campaign, carried out with the \'Echelle spectrograph FLECHAS at the University Observatory Jena in the course of the Gro{\ss}schwabhausen binary survey between December 2016 and…

Solar and Stellar Astrophysics · Physics 2020-03-04 T. Heyne , M. Mugrauer , R. Bischoff , D. Wagner , S. Hoffmann , O. Lux , V. Munz , M. Geymeier , R. Neuhäuser

O- and B-type stars are often found in binary systems, but the low binary mass-ratio regime is relatively unexplored due to observational difficulties. Binary systems with low mass-ratios may have formed through fragmentation of the…

Solar and Stellar Astrophysics · Physics 2015-06-11 Kevin Gullikson , Sarah Dodson-Robinson

We present 248 speckle observations of 43 binary and 19 trinary star systems chosen to make progress in two main areas of investigation: the fundamental properties of metal poor stars and star formation mechanisms. The observations were…

Context. A significant number of the Wolf-Rayet stars seem to be binary or multiple systems, but the nature of many of them is still unknown. Dedicated monitoring of WR stars favours the discovery of new systems. Aims. We explore the…

Solar and Stellar Astrophysics · Physics 2015-06-15 A. Collado , R. Gamen , R. H. Barbá

We present $V$-band photometry of the 20,000 brightest asteroids using data from the All-Sky Automated Survey for Supernovae (ASAS-SN) between 2012 and 2018. We were able to apply the convex inversion method to more than 5,000 asteroids…

Earth and Planetary Astrophysics · Physics 2021-10-13 J. Hanuš , O. Pejcha , B. J. Shappee , C. S. Kochanek , K. Z. Stanek , T. W. -S. Holoien

We have determined spectroscopic orbits for five single-lined spectroscopic binaries, HD 100167, HD 135991, HD 140667, HD 158222, HD 217924. Their periods range from 60.6 to 2403 days and the eccentricities, from 0.20 to 0.84. Our spectral…

Solar and Stellar Astrophysics · Physics 2014-02-07 Francis C. Fekel , Samira Rajabi , Matthew W. Muterspaugh , Michael H. Williamson

Rapidly spinning neutron stars with non-axisymmetric mass distributions are expected to generate quasi-monochromatic continuous gravitational waves. While many searches for unknown, isolated spinning neutron stars have been carried out,…

General Relativity and Quantum Cosmology · Physics 2015-05-27 E. Goetz , K. Riles