Results 61 to 70 of about 1,216 (137)
A magnetic study of the δ Scuti variable HD 21190 and the close solar-type background star CPD −83°64B [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 HD 21190 is a known $\delta$ Scuti star showing Ap star characteristics and a variability period of 3.6 h discovered by the Hipparcos mission. Using Gaia DR1 data for an astrometric analysis, it was recently suggested that HD 21190 forms a physical binary system with the companion CPD -83$^{\circ}$ 64B.
S P Järvinen +5 more
openaire +2 more sources
Asteroseismology of Triple-mode Radial δ Scuti Star: TIC 400562821
The Astrophysical JournalWe investigated the pulsating behavior of TIC 400562821 using high-precision observations from TESS. Fourier analysis of time-series data revealed three independent frequencies.
Xiao-Ya Sun +5 more
doaj +1 more source
Variable stars in the globular cluster NGC 3201. I. Multimode SX Phe-type variables
, 2003 We report on the discovery of eleven multimode SX Phoenicis--type blue stragglers in the field of the southern globular cluster NGC 3201. In these variables both radial and non-radial modes are excited.
Krzeminski, W. +2 more
core +1 more source
The Astrophysical JournalBased on 2 minutes cadence TESS data, we investigate pulsations of TIC 65138566 and TIC 139729335 and discover them to be two new high-amplitude δ Scuti stars with equally spaced g modes.
Xinghao Chen +3 more
doaj +1 more source
The first CCD photometric study of the open cluster NGC 2126
, 2003 We present the first CCD photometric observations of the northern open cluster NGC 2126. Data were taken on eight nights in February and December 2002 with a total time span of ~57 hours.
A. Derekas +35 more
core +1 more source
Discrete Scale Relativity And SX Phoenicis Variable Stars
, 2009 Discrete Scale Relativity proposes a new symmetry principle called discrete cosmological self-similarity which relates each class of systems and phenomena on a given Scale of nature's discrete cosmological hierarchy to the equivalent class of analogue ...
Oldershaw, R. L.
core +1 more source
Hilbert Transform Reveals Unusual Modulation in Delta Scuti Star KIC 10407873
The Astrophysical JournalWe report a δ Scuti star, KIC 10407873, exhibiting significant amplitude modulation. Fourier analysis of Kepler long-cadence data (i.e., Q0-Q17, spanning 1471 days) reveals two distinct features: harmonic series of frequencies in the low-frequency region
Haozhi Wang +5 more
doaj +1 more source
Modelling of the fast rotating delta Scuti star Altair
, 2005 We present an asteroseismic study of the fast rotating star HD187642 (Altair), recently discovered to be a delta Scuti pulsator. We have computed models taking into account rotation for increasing rotational velocities.
Bruntt, H., Buzasi, D., Suarez, J. C.
core +1 more source
Signature of High-amplitude Pulsations in Seven δ Sct Stars via TESS Observations
The Astrophysical JournalThe regular behavior of the pulsations of high-amplitude δ Sct (HADS) stars gives a greater chance to investigate the interiors of stars. We analyzed seven HADS stars showing peak-to-peak amplitudes of more than 0.3 mag that were newly observed by TESS ...
Fatemeh Vasigh +2 more
doaj +1 more source
The Astrophysical JournalAsteroseismic modeling of high-amplitude δ Scuti (HADS) variables critically depends on their accurate classification, which provides robust constraints on stellar physical parameters.
Taozhi Yang, Zhaoyu Zuo
doaj +1 more source