Results 81 to 90 of about 224 (157)
Binarity and multiperiodicity in high-amplitude delta Scuti stars [PDF]
, 2009 We have carried out a photometric and spectroscopic survey of bright high-amplitude delta Scuti (HADS) stars. The aim was to detect binarity and multiperiodicity (or both) in order to explore the possibility of combining binary star astrophysics with ...
Szatmáry, K. +12 more
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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
The Astronomical JournalWe develop an ensemble machine learning framework to estimate key asteroseismic parameters—namely the frequency of the highest peak ( ν ( A _max )), the frequency of maximum oscillation power ( ν _max ), and the large frequency separation (Δ ν )—directly
Akram Bolouki +2 more
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The Identification of RR Lyrae and Delta Scuti Stars from Variable GALEX Ultraviolet Sources
, 2014 We identify the RR Lyrae and delta Scuti (DSCT) stars in three catalogs of GALEX variable sources. The NUV amplitude of RR Lyrae stars is about twice that in V-band, so we find a larger percentage of low amplitude variables than catalogs such as Abbas et al (2014).
Kinman, T. D., Brown, Warren R.
openaire +2 more sources
Period Variation Rates of Four Radial Single-Mode High-Amplitude Delta Scuti Stars [PDF]
In this work, we present a study on the long time-scale period variations of four single-mode high-amplitude delta Scuti stars (HADS) via the classical O−C analysis. The target HADS are (i) XX Cygni, (ii) YZ Bootis, (iii) GP Andromedae, and (iv) ZZ
Jia-Shu Niu, Tian-Fang Ma, Hui-Fang Xue
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Period–Luminosity Relations for Double-mode δ Sct Stars
The Astrophysical JournalPrevious studies of the period–luminosity relations (PLRs) of Delta Scuti ( δ Sct) stars have focused on those with a single pulsation mode. However, for δ Sct stars with many different pulsation modes, classifying a single mode is difficult.
Qi Jia +5 more
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The Astrophysical Journalδ Scuti stars in binary or multiple systems serve as crucial probes for studying stellar pulsation and evolution. However, many such systems are not ideal for asteroseismology due to uncertainties in mass transfer with close companions and the challenges
Ping Li +6 more
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The Astronomical JournalPulsating detached eclipsing binary systems are crucial for studying the internal structure of oscillating stars. These systems are advantageous because binary effects on pulsations are minimal, allowing for more accurate determinations of fundamental ...
Filiz Kahraman Aliçavuş +5 more
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Discovery of 79 δ Scuti Stars in NGC 3532 Suggests a Decrease of Pulsator Occurrence with Age
The Astrophysical JournalMany A–F type stars do not display δ Scuti pulsations, despite being located within the instability strip. Open clusters provide a unique opportunity to study δ Scuti pulsations among coeval populations with uniform chemical composition. Here we use data
Ian Berry +5 more
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