Results 1 to 10 of about 72,602 (290)

New periodic variable stars coincident with ROSAT sources discovered using SuperWASP [PDF]

Astronomy and Astrophysics, 2007
We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables.
A. Collier Cameron, A. J. Norton, Akerlof, Alekseev, Alekseev, B. Enoch, Bejgman, Boller, Bouvier, Bouvier, Bouvier, Brancewicz, Brelstaff, C. A. Haswell, C. Hellier, Chrastina, Collier Cameron, Collier Cameron, D. J. Christian, D. M. Wilson, D. Pollacco, Deeter, Dempsey, Engle, Evans, Feast, Gershberg, Hall, Hall, Hartmann, I. Skillen, J. Irwin, J. P. Nicholas, Jeffries, K. Horne, Koen, Loomis, M. Gallaway, Meinunger, Monet, N. Parley, Neuhauser, P. J. Wheatley, Pallavicini, Pettersen, Pizzolato, Pribulla, Qian, R. A. Street, R. G. West, R. Ryans, Rosner, S. R. Kane, Schmidt, Schmidt, Selam, Skillen, Stanishev, Strassmeier, T. A. Lister, Tamuz, Turner, Vilhu, W. I. Clarkson, Walter, Wegner, Wheatley, Zhang   +67 more
core   +5 more sources

Exploring central star variability of planetary nebulae using gaia photometry [PDF]

Scientific Reports
This study presents an analysis of the variability of 81 central stars of planetary nebulae (CSPNe) are identified as variable in Gaia Data Release 3 (DR3).
M. A. NegmEldin, A. Ali, G. M. Hamid, A. Essam   +3 more
doaj   +2 more sources

San Pedro meeting on Wide Field Variability Surveys: Some concluding comments

EPJ Web of Conferences, 2017
This is a written version of the closing talk at the 22nd Los Alamos Stellar pulsation conference on wide field variability surveys. It comments on some of the issues which arise from the meeting.
Feast Michael W.
doaj   +3 more sources

Variability Catalog of Stars Observed during the TESS Prime Mission

The Astrophysical Journal Supplement Series, 2023
During its 2 yr Prime Mission, TESS observed over 232,000 stars at a 2 minute cadence across ∼70% of the sky. These data provide a record of photometric variability across a range of astrophysically interesting timescales, probing stellar rotation ...
Tara Fetherolf, Joshua Pepper, Emilie Simpson, Stephen R. Kane, Teo Močnik, John Edward English, Victoria Antoci, Daniel Huber, Jon M. Jenkins, Keivan Stassun, Joseph D. Twicken, Roland Vanderspek, Joshua N. Winn   +12 more
doaj   +1 more source

Sparse Logistic Regression for RR Lyrae versus Binaries Classification

The Astrophysical Journal, 2023
RR Lyrae (RRL) stars are old, low-mass, radially pulsating variable stars in their core helium burning phase. They are popular stellar tracers and primary distance indicators since they obey well-defined period–luminosity relations in the near-infrared ...
Piero Trevisan, Mario Pasquato, Gaia Carenini, Nicolas Mekhaël, Vittorio F. Braga, Giuseppe Bono, Mohamad Abbas   +6 more
doaj   +1 more source

Periodic Variable Stars Modulated by Time-varying Parameters [PDF]

The Astrophysical Journal, 2022
Abstract Many astrophysical phenomena are time-varying, in the sense that their brightness changes over time. In the case of periodic stars, previous approaches assumed that changes in period, amplitude, and phase are well described by either parametric or piecewise-constant functions.
Giovanni Motta, Darlin Soto, Márcio Catelan   +2 more
openaire   +3 more sources

NEOWISE Variability of the New Gaia Herbig Ae/Be and Classical Be Stars—Variability Sample and Statistical Analysis

The Astrophysical Journal Supplement Series, 2023
Light variability is an essential attribute of young stellar objects (YSOs) at the pre-main-sequence (PMS) stage, which can be treated as an indicator to trace star formation.
Ying Mei, Shi-Ming Song, Jun-Ting Liu, Lucas J. Hyland, Xi Chen   +4 more
doaj   +1 more source

THE CATALINA SURVEYS PERIODIC VARIABLE STAR CATALOG [PDF]

The Astrophysical Journal Supplement Series, 2014
Accepted ApJS, 43 pages, 9 tables, 44 figures (some at reduced resolution)
A. J. Drake, M. J. Graham, S. G. Djorgovski, M. Catelan, A. A. Mahabal, G. Torrealba, D. García-Álvarez, C. Donalek, J. L. Prieto, R. Williams, S. Larson, E. Christen sen, V. Belokurov, S. E. Koposov, E. Beshore, A. Boattini, A. Gibbs, R. Hill, R. Kowalski, J. Johnson, F. Shelly   +20 more
openaire   +4 more sources

The EPOCH Project: I. Periodic variable stars in the EROS-2 LMC database [PDF]

, 2014
The EPOCH (EROS-2 periodic variable star classification using machine learning) project aims to detect periodic variable stars in the EROS-2 light curve database. In this paper, we present the first result of the classification of periodic variable stars
Bailer-Jones, Coryn A. L., Byun, Yong-Ik, Chang, Seo-Won, Kim, Dae-Won, Marquette, Jean-Baptiste, Protopapas, Pavlos, Shin, Min-Su   +6 more
core   +1 more source

Detecting Short Period Variable Stars with Gaia [PDF]

AIP Conference Proceedings, 2009
We analyzed the frequency domain of time series of simulated ZZ Ceti light-curves to investigate the detectability and period recovery performance of short period variables (periods < 2 hours) for the Gaia mission. In our analysis, first we used a non-linear ZZ Ceti light-curves simulator code to simulate the variability of ZZ Ceti stars (we assumed
Mihaly Varadi, Laurent Eyer, Stefan Jordan, Nami Mowlavi, Detlev Koester, Joyce Ann Guzik, Paul A. Bradley   +6 more
openaire   +2 more sources