Results 21 to 30 of about 1,014 (294)

Observations of red‐giant variable stars by Aboriginal Australians [PDF]

, 2017
Aboriginal Australians carefully observe the properties and positions of stars, including both overt and subtle changes in their brightness, for subsistence and social application. These observations are encoded in oral tradition.
Duane W. Hamacher, Hamacher, Duane W.
core   +1 more source

FX UMa: A New Heartbeat Binary System with Linear and Nonlinear Tidal Oscillations and δ Sct Pulsations

The Astronomical Journal, 2023
We present a detailed analysis of an eclipsing double-lined binary FX UMa based on TESS photometry and newly acquired spectroscopic observations. The radial velocities and atmospheric parameters for each component star are obtained from the SONG high ...
Kun Wang, Anbing Ren, Mads Fredslund Andersen, Frank Grundahl, Tao Chen, Pere L. Pallé   +5 more
doaj   +1 more source

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

, 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.
West, Richard G., Pollacco, Don, M. Gallaway, Street, R. A., Horne, K. (Keith), Kane, S. R., Christian, Damian Joseph, D. J. Christian (7603835), Hellier, Coel, Enoch, B., Nicholas, J. P., D. Pollacco (7603205), Irwin, J., Skillen, I., B. Enoch (7603838), West, R. G., R. A. Street, D. J. Christian, T. A. Lister (7603856), Irwin, Jonathan, K. Horne, Ryans, R., C. A. Haswell, D. M. Wilson (2428792), Wilson, D. M., Christian, D. J., J. P. Nicholas (7614728), S. R. Kane (7603853), S. R. Kane, Haswell, C. A., J. P. Nicholas, B. Enoch, C. Hellier (7603562), Norton, A. J., W. I. Clarkson, R. G. West, Lister, T. A., W. I. Clarkson (7612619), West, R .G., J. Irwin, Gallaway, M., T. A. Lister, Collier Cameron A (7614731), Pollacco, D., Parley, N., K. Horne (7603850), R. Ryans, C. A. Haswell (7603844), P. J. Wheatley (7590065), Hellier, C., Norton, Andrew J., R. Ryans (7612838), N. Parley, D. M. Wilson, Parley, N. R., I. Skillen (7601975), A. J. Norton (7603859), Horne, Keith Douglas, Horne, K. D., I. Skillen, R. G. West (7602272), A. Collier Cameron, J. Irwin (7606340), P. J. Wheatley, C. Hellier, R. A. Street (7603868), M. Gallaway (7614725), N. Parley (7603862), Cameron, Andrew Collier, Collier Cameron, A., Clarkson, W. I., Kane, Sharad R., Wheatley, P. J., A. J. Norton, Wilson, D. M. (David M.), D. Pollacco   +75 more
core   +1 more source

Pulsation models for the 0.26 M⊙ star mimicking RR Lyrae pulsator. Model survey for the new class of variable stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2012
We present non-linear hydrodynamic pulsation models for OGLE-BLG-RRLYR-02792 - a 0.26M_sun pulsator, component of the eclipsing binary system, analysed recently by Pietrzynski et al. The star's light and radial velocity curves mimic that of classical RR Lyrae stars, except for the bump in the middle of the ascending branch of the radial velocity curve.
R. Smolec, G. Pietrzynski, D. Graczyk, B. Pilecki, W. Gieren, I. Thompson, K. Stepien, P. Karczmarek, P. Konorski, M. Gorski, K. Suchomska, G. Bono, PRADA MORONI, PIER GIORGIO, N. Nardetto   +13 more
openaire   +5 more sources

Pulsating variable stars, powerful tools for galactic structure and evolution [PDF]

, 2010
Pulsating variable stars are powerful tools to study the structure and evolution of galaxies. Among different types of pulsating variables the Classical Cepheids trace the young stellar component in galaxies, and are one of the most ...
G. Clementini
core   +1 more source

Variable Stars [PDF]

, 2021
تتطرق هذه المقالة إلى أجرام سماوية شهيرة جداً في علم فيزياء الفلك تدعى بالنجوم المتغيرة (variable stars). تتضمن مجموعة النجوم المتغيرة فيزيائيا نوعين رئيسيين وهما نجوم متغيرة بانتظام ونجوم غير متغيرة بانتظام.
معلا, محمد
core   +1 more source

The impact of large-scale, long-term optical surveys on pulsating star research

EPJ Web of Conferences, 2017
The era of large-scale photometric variability surveys began a quarter of a century ago, when three microlensing projects - EROS, MACHO, and OGLE - started their operation.
Soszyński Igor
doaj   +1 more source

An Observer's View on the Future of Asteroseismology

Frontiers in Astronomy and Space Sciences, 2019
Scientific research is a continuous process, and the speed of future progress can be estimated by the pace of finding explanations for previous research questions. In this observer's based view of stellar pulsation and asteroseismology, we start with the
Margit Paparó
doaj   +1 more source

Multifilter Time-series Observations of Eleven Blue Short-period ATLAS Variable Stars

The Astronomical Journal, 2023
Eleven periodic variable stars were observed photometrically through two to four filters from the set UBVR _C I _C . Phase-folded data for each star cover full cycles of variation.
C. Koen, V. Schaffenroth, A. Kniazev
doaj   +1 more source

Eclipsing Systems with Pulsating Components (Types β Cep, δ Sct, γ Dor or Red Giant) in the Era of High-Accuracy Space Data

Galaxies, 2021
Eclipsing systems are essential objects for understanding the properties of stars and stellar systems. Eclipsing systems with pulsating components are furthermore advantageous because they provide accurate constraints on the component properties, as well
Patricia Lampens
doaj   +1 more source