Results 51 to 60 of about 1,219 (138)
Quadratic Frequency Dispersion in the Oscillations of Intermediate-mass Stars
The Astrophysical Journal LettersAsteroseismology, the study of stellar vibration, has met with great success, shedding light on stellar interior structure, rotation, and magnetism. Prominently known as δ Scutis, the intermediate-mass main-sequence oscillators that often exhibit rapid ...
Subrata Kumar Panda +3 more
doaj +1 more source
Variable Point Sources in Sloan Digital Sky Survey Stripe 82. I. Project Description and Initial Catalog (0 h < R.A. < 4 h) [PDF]
, 2009 We report the first results of a study of variable point sources identified using multi-color time-series photometry from Sloan Digital Sky Survey (SDSS) Stripe 82 over a span of nearly 10 years (1998-2007).
Alcock +31 more
core +1 more source
Seismic Constraints on the Spin Evolution of Slowly Rotating Young Intermediate-mass Stars
The Astrophysical Journalδ Scuti stars are hot, rapid rotators and a poorly understood class of pulsators. Asteroseismology provides the only means with which to probe their interior dynamics.
Kunal H. Singh +3 more
doaj +1 more source
Variable stars in the Open Cluster M11 (NGC 6705)
, 2007 V-band time-series CCD photometric observations of the intermediate-age open cluster M11 were performed to search for variable stars. Using these time-series data, we carefully examined light variations of all stars in the observing field.
Breger M. +17 more
core +1 more source
Deformation and Differential Rotation in Slowly Rotating Young Intermediate-mass Stars
The Astrophysical JournalAsteroseismology, the study of stellar vibrations, is a method that can probe the structure deformation and internal rotation of stars. Salient among the seismic inferences of rotation from TESS observations are TIC 408165734, whose equatorial rotation ...
Subrata Kumar Panda, Shravan Hanasoge
doaj +1 more source
KIC 10855535: An Elegant δ Scuti Pulsator with Amplitude and Phase Modulation
The Astrophysical JournalWe investigated the pulsating behavior of KIC 10855535 using Kepler 4 yr long-cadence data. Two independent frequencies were detected: a pulsation frequency F0 = 17.733260(5) day ^−1 and a low frequency f _8 = 0.412643(8) day ^−1 .
Li-xian Shen +8 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region.
Xin Lyu, Ming Yang
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
Observations and a new interpretation for the Delta Scuti variable star VZ CANCRI
The Astrophysical Journal, 1984 Extensive numbers of new photoelectric data have been collected and analyzed to investigate the modal behavior of VZ Cnc. Its previously observed periods yield a period ratio of 0.80 implying pulsation in the first and second radial overtones. Of the seventeen delta Scuti stars listed by Fitch and Sziedl which have well-determined periods, it is the ...
A. N. Cox, B. J. McNamara, W. Ryan
openaire +1 more source
The Astrophysical JournalEclipsing Algol-type systems containing a δ Scuti (hereafter δ Sct) star enable precise determination of physical parameters and the investigation of stellar internal structure and evolution.
Qi-Huan Zeng +5 more
doaj +1 more source