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We present the latest catalog of more than 1200 spectroscopically-selected close binary systems observed with the Sloan Digital Sky Survey through Data Release Five. We use the catalog to search for magnetic white dwarfs in cataclysmic…

We consider the parallaxes of sixteen cataclysmic variables and related objects that are included in the TGAS catalogue, which is part of the Gaia first data release, and compare these with previous parallax measurements. The parallax of…

Solar and Stellar Astrophysics · Physics 2017-08-23 Gavin Ramsay , Matthias Schreiber , Boris Gansicke , Peter Wheatley

The Jansky Very Large Array was used to observe 121 magnetic cataclysmic variables (MCVs). We report radio detections of 19 stars. Fourteen are new radio sources, increasing the number of MCVs that are radio sources by more than twofold,…

Solar and Stellar Astrophysics · Physics 2017-12-06 Paul E. Barrett , Christopher Dieck , Anthony J. Beasley , Kulinder P. Singh , Paul A. Mason

In cataclysmic variables (CVs), accretion onto white dwarfs produces high temperature, high density plasmas. They cool down from kT~10 keV via bremsstrahlung continuum and K and L shell line emissions. The small volume around white dwarfs…

Astrophysics · Physics 2007-05-23 Koji Mukai

We report the discovery of three previously unknown cataclysmic variables in the data of the first year of the all-sky X-ray survey by the SRG orbital observatory. The sources were selected due to their brightness in the 4--12 keV band in…

High Energy Astrophysical Phenomena · Physics 2022-05-25 I. Zaznobin , S. Sazonov , R. Burenin , G. Uskov , A. Semena , M. Gilfanov , P. Medvedev , R. Sunyaev , M. Eselevich

I conducted photometric observations of the cataclysmic variable LAMOST J035913.61+405035.0 and discovered previously unknown eclipses. During these observations, I recorded 14 eclipses over two groups of nights separated by 13 months. I…

Solar and Stellar Astrophysics · Physics 2024-11-14 V. P. Kozhevnikov

We present the quasar catalog from Data Releases 10 to 12 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Quasar Survey, comprising quasars observed between September 2021 and June 2024. We robustly identified…

Astrophysics of Galaxies · Physics 2026-04-15 Bing Lyu , Xue-Bing Wu , Jun-Jie Jin , Yuming Fu , Yuxuan Pang , Huimei Wang , Rui Zhu , Su Yao , Yan-Li Ai , Yan-xia Zhang , Hai-long Yuan , Zhi-ying Huo

We present photometry and spectroscopy of the suspected cataclysmic variable (CV) Lanning 386. We confirm that it is a CV, and observe deep eclipses, from which we determine the orbital period Porb to be 0.1640517 +- 0.0000001 d (= 3.94 h).…

Discovery and characterisation of black holes (BHs), neutron stars (NSs), and white dwarfs (WDs) with detached luminous companions (LCs) in wide orbits are exciting because they are important test beds for dark remnant (DR) formation…

Solar and Stellar Astrophysics · Physics 2023-07-12 Anindya Ganguly , Prasanta K. Nayak , Sourav Chatterjee

We measure the spatial distribution and hard X-ray luminosity function of cataclysmic variables (CVs) using the INTEGRAL all-sky survey in the 17-60 keV energy band. The vast majority of the INTEGRAL detected CVs are intermediate polars…

Astrophysics · Physics 2009-11-13 M. Revnivtsev , S. Sazonov , R. Krivonos , H. Ritter , R. Sunyaev

In a search for cataclysmic variables in the Calan-Tololo Survey we have detected 21 systems, 16 of them previously unknown. In this paper we present detailed time-series photometry for those six confirmed cataclysmic variables that show…

Astrophysics · Physics 2009-11-10 C. Tappert , T. Augusteijn , J. Maza

During its lifetime, the Far Ultraviolet Spectroscopic Explorer (FUSE) was used to observe 99 cataclysmic variables in 211 separate observations. Here, we present a survey of the moderate resolution (R\simeq10,000), far-ultraviolet (905 -…

Astrophysics of Galaxies · Physics 2015-06-03 C. S. Froning , K. S. Long , B. Gaensicke , P. Szkody

We present a binary evolution study of cataclysmic variables (CVs) and related systems with white dwarf accretors, including for example, AM CVn systems, classical novae, supersoft X-ray sources, and systems with giant donor stars. Our…

Solar and Stellar Astrophysics · Physics 2016-12-14 B. Kalomeni , L. Nelson , S. Rappaport , M. Molnar , J. Quintin , K. Yakut

We selected 82 u-band variable objects based on the u-band photometry data from SCUSS and SDSS, in the field of LAMOST Complete Spectroscopic Survey of Pointing Area at Southern Galactic Cap. The magnitude variation of the targets is…

Cataclysmic variables (CV) encompass a diverse array of accreting white dwarf binary systems. Each class of CV represents a snapshot along an evolutionary journey, one with the potential to trigger a type Ia supernova event. The study of…

Solar and Stellar Astrophysics · Physics 2023-12-12 D. Mistry , C. M. Copperwheat , I. Olier , M. J. Darnley

We present time-resolved photometry of six faint (V>17mag) cataclysmic variables (CVs); one of them is V849 Oph and the others are identified from the Sloan Digital Sky Survey (SDSS J0920+0042, SDSS J1327+6528, SDSS J1227+5139, SDSS…

Solar and Stellar Astrophysics · Physics 2015-05-19 Dicle Zengin Çamurdan , Cafer İbanoğlu , C. Muzaffer Çamurdan

We present the results of our search for variable stars using the long-term Las Cumbres Observatory (LCO) monitoring of white dwarf ZTF J0139+5245 with the two 1.0-m telescope nodes located at McDonald Observatory using the Sinistro imaging…

Solar and Stellar Astrophysics · Physics 2021-09-29 Aniket Sanghi , Zachary P. Vanderbosch , Michael H. Montgomery

We investigate here populations of cataclysmic variables (CVs) in a set of 288 globular cluster (GC) models evolved with the MOCCA code. This is by far the largest sample of GC models ever analysed with respect to CVs. Contrary to what has…

Astrophysics of Galaxies · Physics 2018-12-12 Diogo Belloni , Mirek Giersz , Liliana E. Rivera Sandoval , Abbas Askar , Paweł Ciecieląg

We present the first results of an ongoing spectroscopic follow-up program of blue H-alpha excess sources within the Kepler field-of-view, in order to identify new cataclysmic variables. Kepler observations of the identified targets in this…

Solar and Stellar Astrophysics · Physics 2015-06-11 S. Scaringi , P. J. Groot , K. Verbeek , S. Greiss , C. Knigge , E. Koerding

We present the Data Release 4&5 quasar catalog from the quasar survey by Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST), which includes quasars observed between September 2015 and June 2017. There are a total of 19,253…