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A very long term near-infrared variable star survey towards the Large and Small Magellanic Clouds was carried out using the 1.4m InfraRed Survey Facility at the South African Astronomical Observatory. This project was initiated in December…

We study the morphology of the stellar periphery of the Magellanic Clouds in search of substructure using near-infrared imaging data from the VISTA Hemisphere Survey (VHS). Based on the selection of different stellar populations using the…

Rossi X-Ray Timing Explorer observations of the Small Magellanic Cloud have revealed a previously unknown transient X-ray pulsar with a pulse period of 95s. Provisionally designated XTE SMC95, the pulsar was detected in three Proportional…

Astrophysics · Physics 2009-11-07 S. Laycock , R. H. D. Corbet , D. Perrodin , M. J. Coe , F. E. Marshall , C. Markwardt

We use the Auriga cosmological simulations of Milky Way (MW)-mass galaxies and their surroundings to study the satellite populations of dwarf galaxies in $\Lambda$CDM. As expected from prior work, the number of satellites above a fixed…

We present a large sample of eclipsing binary stars detected in the Small Magellanic Cloud fields covering about 14 square degrees that have been monitored for eight years during the third phase of the OGLE survey. This is the largest set…

We present a source catalog from the first deep hard X-ray ($E>10$ keV) survey of the Small Magellanic Cloud (SMC), the NuSTAR Legacy Survey of the SMC. We observed three fields, for a total exposure time of 1 Ms, along the bar of this…

We report the discovery of 11 newly found quasars behind the stellar disks of the spiral galaxies M31 and M33 in the fields covered by the Local Group Galaxy Survey. Their redshifts range from 0.37 to 2.15. Most are X-ray, UV, and IR…

Astrophysics of Galaxies · Physics 2020-01-08 Philip Massey , Kathryn F. Neugent , Emily M. Levesque

On MJD 56590-1 (2013 Oct 25-26) observations of the Magellanic Clouds by the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) observatory discovered a previously-unreported bright, flaring X-ray source. This source was initially…

High Energy Astrophysical Phenomena · Physics 2015-06-23 M. J. Coe , E. S. Bartlett , A. J. Bird , F. Haberl , J. A. Kennea , V. A. McBride , L. J. Townsend , A. Udalski

We study the spectral properties in the range 3600 \AA - 6800 \AA of the nuclear region of galaxies behind the Magellanic Clouds. The radial velocities clarified the nature of the objects as background galaxies or extended objects belonging…

Astrophysics · Physics 2009-11-06 C. M. Dutra , E. Bica , J. J. Claria , A. E. Piatti , A. V. Ahumada

We examine Milky Way-Magellanic Cloud systems selected from the Millennium-II Simulation in order to place the orbits of the Magellanic Clouds in a cosmological context. Our analysis shows that satellites massive enough to be LMC analogs…

Astrophysics of Galaxies · Physics 2011-06-09 Michael Boylan-Kolchin , Gurtina Besla , Lars Hernquist

We present a measurement of the systemic proper motion of the Small Magellanic Cloud (SMC) made using the Advanced Camera for Surveys (ACS) on the \textit{Hubble Space Telescope} (\textit{HST}). We tracked the SMC's motion relative to 4…

Astrophysics · Physics 2008-11-26 Nitya Kallivayalil , Roeland P. van der Marel , Charles Alcock

New star cluster candidates projected toward the Large and Small Magellanic Clouds (L/SMC) have been recently discovered from relatively deep imaging surveys. We here conduct a sound analysis of 24 star cluster candidates located in the…

Astrophysics of Galaxies · Physics 2021-03-10 Andrés E. Piatti

A systematic survey of the Large and Small Magellanic Clouds for radio pulsars using the Parkes radio telescope and the 20-cm multibeam receiver has resulted in the discovery of 14 pulsars and the redetection of five of the eight previously…

Astrophysics · Physics 2008-11-26 R N Manchester , G Fan , A G Lyne , V M Kaspi

The Large Magellanic Cloud (LMC) hosts a rich population of supernova remnants (SNRs), our knowledge of which is the most complete of any galaxy. However, there remain many candidate SNRs, identified through optical and radio observations…

High Energy Astrophysical Phenomena · Physics 2022-03-30 P. J. Kavanagh , M. Sasaki , M. D. Filipovic , S. D. Points , L. M. Bozzetto , F. Haberl , P. Maggi , C. Maitra

During an X-ray survey of the Small Magellanic Cloud, carried out with the XMM-Newton satellite, we detected significant soft X-ray emission from the central star of the high-excitation planetary nebula SMP SMC 22. Its very soft spectrum is…

Solar and Stellar Astrophysics · Physics 2015-05-18 S. Mereghetti , N. Krachmalnicoff , N. La Palombara , A. Tiengo , T. Rauch , F. Haberl , M. D. Filipovic , R. Sturm

In this paper we report a clustering analysis of upper main-sequence stars in the Small Magellanic Cloud, using data from the VMC survey (the VISTA near-infrared YJKs survey of the Magellanic system). Young stellar structures are identified…

We investigate structural, kinematical, and chemical properties of stars and gas in the Small Magellanic Cloud (SMC) interacting with the Large Magellanic Cloud (LMC) and the Galaxy based on a series of self-consistent chemodynamical…

Astrophysics · Physics 2009-11-13 Kenji Bekki , Masashi Chiba

We present an analysis of the long-term optical/IR behavior of 111 high-mass X-ray binaries (HMXBs) in the Small Magellanic Cloud based on data from the OGLE collaboration. Most systems exhibit variability on a range of time scales. This…

High Energy Astrophysical Phenomena · Physics 2025-01-24 Helena Treiber , Georgios Vasilopoulos , Charles Bailyn , Frank Haberl , Andrzej Udalski

We present the results of a systematic search for point-like and moderately extended soft (0.1-2.4 keV) X-ray sources in a raster of nine pointings covering a field of 8.95 deg^2 and performed with the ROSAT PSPC between October 1991 and…

Astrophysics · Physics 2009-10-31 P. Kahabka , W. Pietsch , M. D. Filipovic , F. Haberl

The nearby dwarf irregular galaxies the Large and Small Magellanic Clouds have metallicities of about half and a fifth solar, respectively, which offers the unique opportunity to study astrophysical processes as a function of metallicity.…

Astrophysics of Galaxies · Physics 2012-10-04 Jacco Th. van Loon