Results 111 to 120 of about 5,541 (198)

Constraints on the Distance Moduli, Helium and Metal Abundances, and Ages of Globular Clusters from their RR Lyrae and Non-variable Horizontal-branch Stars. III. M55 and NGC 6362 [PDF]

, 2018
Don A. VandenBerg, Pavel A. Denissenkov
openalex   +1 more source

Classification of Periodic Variable Stars from TESS

The Astrophysical Journal Supplement Series
The number of known periodic variable stars has increased rapidly in recent years. As an all-sky transit survey, the Transiting Exoplanet Survey Satellite (TESS) plays an important role in detecting low-amplitude variable stars.
Xinyi Gao, Xiaodian Chen, Shu Wang, Jifeng Liu   +3 more
doaj   +1 more source

The ancient stellar population of M 32: RR Lyrae variable stars confirmed [PDF]

, 2011
G. Fiorentino, R. Contreras Ramos, Eline Tolstoy, G. Clementini, Abhijit Saha   +4 more
openalex   +1 more source

Photometric Metallicity and Distance for the Two RR Lyrae in Segue II and Ursa Major II Dwarf Galaxies Based on Multiband Light Curves

The Astronomical Journal
Multiband light curves of two RR Lyrae variables in Segue II and Ursa Major II ultrafaint dwarf galaxies were collected from near simultaneous observations using the Lulin One-meter Telescope in Vgri bands.
Chow-Choong Ngeow, Anupam Bhardwaj
doaj   +1 more source

Stellar Atmospheric Parameters of ∼11,000 RR Lyrae Stars from LAMOST Spectra

The Astrophysical Journal Supplement Series
Accurate determination of the stellar atmospheric parameters of RR Lyrae stars (RRLs) requires short individual exposures of the spectra to mitigate pulsation effects.
Jiangtao Wang, Jianrong Shi, Jianning Fu, Weikai Zong, Chunqian Li   +4 more
doaj   +1 more source

Color–Magnitude Diagram of NGC 205 and Its RR Lyrae Variables

The Astronomical Journal
We present the deepest color–magnitude diagram (CMD) for NGC 205 in the F606W (≈ V ) and F814W (≈ I ) filters. Our archival Hubble Space Telescope/Advanced Camera for Surveys field is centered ∼3 $\mathop{.}\limits^{{\rm{^{\prime} }}}$ 8 northwest of the
Ata Sarajedini
doaj   +1 more source

Period Changes of Mira Variables, RR Lyrae Stars, and Type II Cepheids [PDF]

, 2013
H. A. Smith
openalex   +1 more source

The Lack of RR Lyrae Variables in Ultrafaint Dwarf Galaxy Sextans II

The Astronomical Journal
RR Lyrae in ultrafaint dwarf (UFD) galaxies, if found, would be valuable to constrain the distances of these UFD. In this work, we report our search of RR Lyrae in a recently discovered UFD—Sextans II. Based on multiband (griz) time-series archival DECam
Chow-Choong Ngeow, Anupam Bhardwaj
doaj   +1 more source

Variable stars in the Gaia era: Mira, RR Lyrae, δ and Type-II Cepheids [PDF]

, 2017
Martin A. T. Groenewegen
openalex   +1 more source

First Detection of Shock Waves in RRc Stars

The Astrophysical Journal
Although shock waves have been well documented in fundamental-mode RRab stars, their existence in first-overtone pulsator stars, RRc stars, has remained uncertain. Building upon the spectroscopic frameworks established by M. Chadid et al., we present the
Junzhang Li, Merieme Chadid
doaj   +1 more source