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We present new radio images obtained with the Australia Telescope Compact Array (ATCA) and the Very Large Array (VLA) for a group of 14 galaxies belonging to the 2-Jy sample of radio sources. The new images improve the data already…

Astrophysics · Physics 2009-10-31 R. Morganti , T. Oosterloo , C. N. Tadhunter , R. Aiudi , P. Jones , M. Villar-Martin

Aims. With the aim to reveal the effects of the magnetic field to the multi-band activity of dwarf stars, we search for associated radio emission for an extensive list of 14 915 brown dwarfs and 15 124 flaring stars. Methods. We utilised…

Solar and Stellar Astrophysics · Physics 2025-06-30 K. Perger , B. Seli , K. Vida

We test the hypothesis that environments play a key role in enabling the growth of enormous radio structures spanning more than 700 kpc, an extreme population of radio galaxies called giant radio galaxies (GRGs). To achieve this, we explore…

Astrophysics of Galaxies · Physics 2021-02-17 Ting-Wen Lan , J. Xavier Prochaska

AIMS: Search for star formation regions in the hosts of potentially young radio galaxies (Gigahertz Peaked Spectrum and Compact Steep Spectrum sources). METHODS: Near-UV imaging with the Hubble Space Telescope Advanced Camera for Surveys.}…

Astrophysics · Physics 2009-11-13 A. Labiano , C. P. O'Dea , P. D. Barthel , W. H. de Vries , S. A. Baum

We present deep 3.6 cm radio continuum observations of the HII region W40 obtained using the Very Large Array in its A and B configurations. We detect a total of 20 compact radio sources in a region of 4 x 4 arcmin, with 11 of them…

Astrophysics of Galaxies · Physics 2015-05-19 Luis F. Rodríguez , Steven A. Rodney , Bo Reipurth

Radio surveys of ultraluminous X-ray sources (ULXs) allow us to find supercritically accreting compact objects (SS 433/W50 like systems) or stripped nuclear black holes in nearby galaxies. We identified 21 such objects by crossmatching a…

High Energy Astrophysical Phenomena · Physics 2026-01-06 Yijia Zhang , Hua Feng , Ailing Wang , Roberto Soria

We constructed and presented in the first paper of this series a new sample of 84 large angular size radio galaxies by selecting from the NRAO VLA Sky Survey objects with angular size > 4', declination above +60 degrees and total flux…

Astrophysics · Physics 2009-11-07 L. Lara , I. Marquez , W. D. Cotton , L. Feretti , G. Giovannini , J. M. Marcaide , T. Venturi

The mechanism for jet formation in the disks of T Tauri stars is poorly understood. Observational benchmarks to launching models can be provided by tracing the physical properties of the kinematic components of the wind and jet in the inner…

Solar and Stellar Astrophysics · Physics 2019-10-23 T. Giannini , B. Nisini , S. Antoniucci , K. Biazzo , J. Alcalá , F. Bacciotti , D. Fedele , A. Frasca , A. Harutyunyan , U. Munari , E. Rigliaco , F. Vitali

We present HST/NICMOS observations with 0.1" (15 AU) resolution of six young stellar objects in the Taurus star-formation region. The targets of our survey are three Class I IRAS sources (IRAS 04016+2610, IRAS 04248+2612, and IRAS…

The Central Molecular Zone (CMZ), a $\sim$200 pc sized region around the Galactic Centre, is peculiar in that it shows a star formation rate (SFR) that is suppressed with respect to the available dense gas. To study the SFR in the CMZ,…

We present the results of a high angular resolution (1.1") and sensitivity (maximum of ~0.1 mJy) radio survey at 1-2 GHz in the Galactic Bulge. This complements the X-ray Chandra Galactic Bulge Survey, and investigates the full radio source…

High Energy Astrophysical Phenomena · Physics 2024-05-09 E. C. Pattie , T. J. Maccarone , C. T. Britt , C. O. Heinke , P. G. Jonker , D. R. Lorimer , G. R. Sivakoff , D. Steeghs , J. Strader , M. A. P. Torres , R. Wijnands

Recent theoretical and observational studies debate the similarities between the formation process of high-mass (>8 Msun) and low-mass stars. The formation of low-mass star formation is directly associated with the presence of disks and…

We have conducted a high-resolution imaging study of the Taurus-Auriga star-forming region in order to characterize the primordial outcome of multiple star formation and the extent of the brown dwarf desert. Our survey identified 16 new…

Solar and Stellar Astrophysics · Physics 2015-05-27 Adam L. Kraus , Michael J. Ireland , Frantz Martinache , Lynne A. Hillenbrand

The third Fermi Large Area Telescope (LAT) $\gamma$-ray source catalog (3FGL) contains over 1000 objects for which there is no known counterpart at other wavelengths. The physical origin of the $\gamma$-ray emission of those objects is…

High Energy Astrophysical Phenomena · Physics 2017-04-12 F. K. Schinzel , L. Petrov , G. B. Taylor , P. G. Edwards

We report the results of our radial-velocity monitoring of spectroscopic binary systems in a sample of X-ray sources from the ROSAT All Sky Survey south of the Taurus-Auriga star-forming region. The original sample of approximately 120…

Astrophysics · Physics 2009-11-07 Guillermo Torres , Ralph Neuhaeuser , Eike W. Guenther

We have developed a new method of multi-wavelength data combination for the search of late-type radio dwarfs, and have put it into practice using GLEAM-X DR1 data. The initial sample is selected by cross-matching the Gaia/DR3 objects with…

Solar and Stellar Astrophysics · Physics 2024-10-30 Qichen Huang , Biwei Jiang , Zehao Zhang , Albert Zijlstra

We present results from a search for radio emission in 77 stellar systems hosting 140 exoplanets, predominantly within 17.5 pc using the Very Large Array (VLA) at $4-8$ GHz. This is the largest and most sensitive search to date for radio…

Earth and Planetary Astrophysics · Physics 2024-04-29 Kevin N. Ortiz Ceballos , Yvette Cendes , Edo Berger , Peter K. G. Williams

Context. With the latest infrared surveys, the number of massive protostellar candidates has increased significantly. New studies have posed additional questions on important issues about the formation, evolution, and other phenomena…

Astrophysics of Galaxies · Physics 2015-05-19 P. Benaglia , M. Ribo , J. A. Combi , G. E. Romero , S. Chaty , B. Koribalski , I. F. Mirabel , L. F. Rodriguez , G. Bosch

We present near ultraviolet imaging with the Hubble Space Telescope Advanced Camera for Surveys, targeting young radio galaxies (Gigahertz Peaked Spectrum and Compact Steep Spectrum sources), in search of star formation regions in their…

Astrophysics · Physics 2009-11-11 A. Labiano , C. P. O'Dea , P. D. Barthel , W. H. de Vries , S. A. Baum

We report on the detection of radio bursts from the Galactic bulge using the real-time transient detection and localization system, realfast. The pulses were detected commensally on the Karl G. Jansky Very Large Array during a survey of…