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Related papers: High Amplitude \delta-Scutis in the Large Magellan…

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$\delta$ Scuti stars are pulsating variable stars that exhibit both radial and non-radial pulsations, making them key objects for understanding stellar evolution and internal structures. The current classification of $\delta$ Scuti stars…

Solar and Stellar Astrophysics · Physics 2026-02-03 J. R. Rodon , J. Pascual-Granado , M. Lares-Martiz , M. Rodríguez Sánchez , C. Roche

We report the discovery of three new triple-mode classical Cepheids in the Large Magellanic Cloud, two of them with the fundamental, first overtone and second overtone excited, and one pulsating simultaneously in the first three overtones.…

We present results of a multi-year study of the high-amplitude $\delta$ Scuti (HADS) star GSC 03144-595. The star was observed between June and September in 2011 and 2014 for 13 nights and 28 nights respectively. Based on our results we…

Solar and Stellar Astrophysics · Physics 2016-03-30 Ben Mow , Erik Reinhart , Samantha Nhim , Richard Watkins

Pulsating variable $\delta$ Scuti stars are intermediate-mass stars with masses in the range of $1-3$ $M_{\odot}$ and spectral types between $A2$ and $F2$. They can be found at the intersection of the Cepheid instability strip with the main…

Solar and Stellar Astrophysics · Physics 2023-09-11 Mami Deka , Shashi M. Kanbur , Sukanta Deb , Susmita Das

A number of microlensing dark-matter surveys have produced tens of millions of light curves of individual background stars. These data provide an unprecedented opportunity for systematic studies of whole classes of variable stars and their…

We have explored a sample of suspected A-type binaries in a systematic way, both spectroscopically and photometrically. Due to their location in the H-R diagram, indications of pulsation and/or chemical peculiarities among these suspected…

Metallicities for six double mode RR Lyrae's (RRd's) in the Large Magellanic Cloud have been estimated using the DeltaS method. The derived [Fe/H] values are in the range [Fe/H] = -1.09 to -1.78 (or -0.95 to -1.58, adopting a different…

Astrophysics · Physics 2009-11-06 A. Bragaglia , R. G. Gratton , E. Carretta , G. Clementini , L. Di Fabrizio , M. Marconi

We present the results of a cluster search in the gamma-ray sky images of the Large Magellanic Cloud (LMC) region by means of the Minimum Spanning Tree (MST) and DBSCAN algorithms, at energies higher than 6 and 10 GeV, using 12 years of…

High Energy Astrophysical Phenomena · Physics 2022-07-13 R. Campana , E. Massaro , F. Bocchino , M. Miceli , S. Orlando , A. Tramacere

We present H- and Ks-band imaging of three fields at the centre of 30 Doradus in the Large Magellanic Cloud, obtained as part of the Science Demonstration programme with the Multi-conjugate Adaptive optics Demonstrator (MAD) at the Very…

Solar and Stellar Astrophysics · Physics 2015-05-18 M. A. Campbell , C. J. Evans , A. D. Mackey , M. Gieles , J. Alves , J. Ascenso , N. Bastian , A. J. Longmore

Recent millimeter/sub-millimeter facilities have revealed the physical properties of filamentary molecular clouds in relation to high-mass star formation. A uniform survey of the nearest, face-on star-forming galaxy, the Large Magellanic…

Many A-F type stars do not display $\delta$ Scuti pulsations, despite being located within the instability strip. Open clusters provide a unique opportunity to study $\delta$ Scuti pulsations among coeval populations with uniform chemical…

Solar and Stellar Astrophysics · Physics 2025-10-24 Ian Berry , Daniel Huber , Yaguang Li , Daniel Hey , Timothy R. Bedding , Simon J. Murphy

We describe a moderate-resolution FUSE survey of H2 along 70 sight lines to the Small and Large Magellanic Clouds, using hot stars as background sources. FUSE spectra of 67% of observed Magellanic Cloud sources (52% of LMC and 92% of SMC)…

The Magellanic Clouds host a large population of high-mass X-ray binary (HMXB) systems, but although the Large Magellanic Cloud (LMC) is an order of magnitude more massive than the Small Magellanic Cloud, significantly fewer HMXBs are…

Solar and Stellar Astrophysics · Physics 2022-06-08 F. Haberl , C. Maitra , G. Vasilopoulos , P. Maggi , A. Udalski , I. M. Monageng , D. A. H. Buckley

We use TESS 10-minute Full Frame Images (Sectors 27-55) to study a sample of 1708 stars within 500 pc of the Sun that lie in a narrow colour range in the centre of the delta Scuti instability strip (0.29 < BP-RP < 0.31). Based on the…

We present time-series observations of Population \rom{2} Cepheids in the Large Magellanic Cloud at near-infrared ($JHK_s$) wavelengths. Our sample consists of 81 variables with accurate periods and optical ($VI$) magnitudes from the OGLE…

Solar and Stellar Astrophysics · Physics 2017-03-22 Anupam Bhardwaj , Lucas M. Macri , Marina Rejkuba , Shashi M. Kanbur , Chow-Choong Ngeow , Harinder P. Singh

We present a catalog of high-velocity clouds in the region of the Magellanic Leading Arm. The catalog is based on neutral hydrogen (\HI) observations from the Parkes Galactic All-Sky Survey (GASS). Excellent spectral resolution allows…

Astrophysics of Galaxies · Physics 2015-06-11 Bi-Qing For , Lister Staveley-Smith , Naomi M. McClure-Griffiths

We present results of a variability study in the optical band of 44 newly identified blazar candidates behind the Magellanic Clouds. Our sample contains 27 flat spectrum radio quasars (FSRQs) and 17 BL Lacertae objects (BL Lacs). However,…

High Energy Astrophysical Phenomena · Physics 2019-11-11 Natalia Żywucka , Mariusz Tarnopolski , Markus Böttcher , Łukasz Stawarz , Volodymyr Marchenko

We present a comprehensive study of the excitation of CI fine-structure levels along 57 sight lines in the Large and Small Magellanic Clouds. The sight lines were selected by the detection of H$_2$ in FUSE spectra. Using archival HST/COS…

Astrophysics of Galaxies · Physics 2023-09-06 D. N. Kosenko , S. A. Balashev , V. V. Klimenko

We compiled a list of about 250 SX Phoenicis stars known in Galactic globular clusters in order to study period-luminosity relation for this type of variable. The absolute magnitudes of these stars are derived using metallicity-luminosity…

Solar and Stellar Astrophysics · Physics 2012-11-26 Grzegorz Kopacki , Andrzej Pigulski

The multi-color CCD photometric study of 27 Delta Scuti stars is presented. By using approximately three years of photometric observations, we obtained the times of maxima and magnitude changes during the observation time interval for each…