Results 11 to 20 of about 5,204,122 (311)

Parameters and Pulsation Constant of Cepheid

Particles, 2023
The analysis of fifty empirical period-radius relations and forty-three empirical period-luminosity relations is performed for the Cepheids. It is found that most of these relations have significant systematic errors.
Sergei V. Sinitsyn
doaj   +1 more source

A new study of the variable star population in the Hercules globular cluster (M13; NGC 6205)★ [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present the results from $VI$ CCD time-series photometry of the globular cluster M13 (NGC 6205). From the Fourier decomposition of the light curves of RRab and RRc stars we found an average metallicity of [Fe/H]zw = -1.58 $\pm$ 0.09.
D. Deras, A. Ferro, C. Lázaro, I. B. Fierro, J. Calderón, S. Muneer, S. Giridhar   +6 more
semanticscholar   +1 more source

Variable Star Classification Using Multi-View Metric Learning [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Comprehensive observations of variable stars can include time domain photometry in a multitude of filters, spectroscopy, estimates of colour (e.g. U-B), etc.
K. Johnston, S. Caballero-Nieves, V. Petit, A. Peter, Rana Haber   +4 more
semanticscholar   +1 more source

A near infrared variable star survey in the Magellanic Clouds: The Small Magellanic Cloud data [PDF]

Monthly notices of the Royal Astronomical Society, 2018
A very long term near-infrared variable star survey towards the Large and Small Magellanic Clouds was carried out using the 1.4m InfraRed Survey Facility at the South African Astronomical Observatory.
Y. Ita, N. Matsunaga, T. Tanabé, Y. Nakada, D. Kato, T. Nagayama, C. Nagashima, M. Kurita, Y. Nakajima, P. Whitelock, J. Menzies, M. Feast, T. Nagata, M. Tamura, Hidehiko Nakaya Astronomical Institute, Graduate School of Science, T. University, A. Aoba, Aoba-ku, Sendai, Miyagi, Japan., D. O. Astronomy, School of Materials Science, T. U. O. Tokyo, Hongo, Bunkyo-ku, Tokyo, I. O. Astronomy, Mitaka, Center for Low Carbon Society Strategy, Japan Science, Technology Agency, S. Plaza, Yonban-cho, Chiyoda-ku, Department of Materials Science, Engineering, Kagoshima University, Korimoto, Kagoshima, D. O. Astrophysics, Nagoya University, Chikusa-ku, Nagoya, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto, Hitotsubashi University, Naka, Kunitachi, U. C. Town, Rondebosch, S. Africa, South African astronomical Observatory, Observatory, N. A. O. O. Japan, A. Center   +58 more
semanticscholar   +1 more source

The EDGE-CALIFA survey: exploring the star formation law through variable selection [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present a multilinear analysis to determine the significant predictors of star formation in galaxies using the combined EDGE-CALIFA sample of galaxies.
B. Dey, E. Rosolowsky, Yixian Cao, A. Bolatto, S. Sánchez, D. Utomo, D. Colombo, V. Kalinova, T. Wong, L. Blitz, S. Vogel, Jason L. Loeppky, R. García-Benito   +12 more
semanticscholar   +1 more source

Variability in NGC 3201 Giant Stars

The Astronomical Journal, 2023
We present the analysis of 510 light curves in V and I bands of 255 giant stars in the globular cluster NGC 3201. Our aim is to expand the sample of new types of variables reported in a previous study. These variables show a short period ( P _V < 0.6 day)
C. C. Cortés, Á. Llancaqueo Albornoz, S. Villanova, J. A. Ahumada, C. Parisi   +4 more
doaj   +1 more source

Direct-imaging Discovery of a Substellar Companion Orbiting the Accelerating Variable Star HIP 39017 [PDF]

Astronomical Journal
We present the direct-imaging discovery of a substellar companion (a massive planet or low-mass brown dwarf) to the young, γ Doradus (γ Dor)-type variable star HIP 39017 (HD 65526). The companion’s SCExAO/CHARIS JHK (1.1–2.4 μm) spectrum and Keck/NIRC2 L′
T. Tobin, T. Currie, Yiting Li, J. Chilcote, Timothy D. Brandt, B. Lacy, M. Kuzuhara, Maria Vincent, M. El Morsy, V. Deo, Jonathan P. Williams, O. Guyon, J. Lozi, S. Vievard, N. Skaf, K. Ahn, Tyler Groff, N. Kasdin, T. Uyama, M. Tamura, A. Gibbs, Briley L. Lewis, R. Bowens-Rubin, M. Salama, Qier An, Minghan Chen   +25 more
semanticscholar   +1 more source

Variable Outer Disk Shadowing around the Dipper Star RXJ1604.3–2130 [PDF]

Astrophysical Journal, 2018
Low brightness dips have recently been observed in images of protoplanetary disks, and they are believed to be shadows by the inner disk. We present VLT/SPHERE polarimetric differential imaging of the transition disk around the dipper star RX J1604.3 ...
Paola Pinilla, M. Benisty, M. Benisty, J. D. Boer, C. Manara, J. Bouvier, C. Dominik, C. Ginski, C. Ginski, R. Loomis, A. S. Aguilar   +10 more
semanticscholar   +1 more source

Future of the General Catalogue of Variable Stars from the Experience of Recent Name-lists

Open Astronomy, 2021
We briefly outline the history of the General Catalogue of Variable Stars (GCVS) and the New Catalogue of Suspected Variable Stars (NSV catalogue). Recently, we have completed a revision of the NSV catalogue.
Samus Nikolay N., Kazarovets Elena V., Durlevich Olga V., Kireeva Natalia N., Pastukhova Elena N., Khruslov Anton V.   +5 more
doaj   +1 more source

A Construction of an Automatic Observation System for Bright and Long Period Variable Stars [PDF]

Journal of Astronomy and Space Sciences, 2006
An automatic observation system has been constructed at Chungbuk National University for the purpose of monitoring the bright and long period variable stars effectively.
Joh-Na Yoon, Chung-Uk Lee, Sang-Mok Cha, Yonggi Kim   +3 more
doaj   +1 more source