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I describe an observational program aimed at understanding the radio emission from distant, rapidly evolving galaxy populations. These observations were carried out at 1.4 and 8.5 GHz with the VLA centered on the Hubble Deep Field. Further…

Astrophysics · Physics 2009-10-31 E. A. Richards

We present a study of the hierarchical clustering of the young stellar clusters in six local (3--15 Mpc) star-forming galaxies using Hubble Space Telescope broad band WFC3/UVIS UV and optical images from the Treasury Program LEGUS (Legacy…

We make use of the deep Karl G. Jansky Very Large Array (VLA) COSMOS radio observations at 3 GHz to infer radio luminosity functions of star-forming galaxies up to redshifts of z~5 based on approximately 6000 detections with reliable…

We present results on the emission-line properties of z=1.4-7.5 star-forming galaxies in the Assembly of Ultradeep Rest-optical Observations Revealing Astrophysics (AURORA) Cycle 1 JWST/NIRSpec program. Based on its depth, continuous…

A multi-wavelength investigation of the star forming complex IRAS 20286+4105, located in the Cygnus-X region, is presented here. Near-infrared K-band data is used to revisit the cluster / stellar group identified in previous studies. The…

Solar and Stellar Astrophysics · Physics 2016-11-10 Varsha R , S. R. Das , A. Tej , S. Vig , S. K. Ghosh , D. K. Ojha

We present the results of a multiplicity survey of 212 T Tauri stars in the Chamaeleon I and Taurus-Auriga star-forming regions, based on high-resolution spectra from the Magellan Clay 6.5 m telescope. From these data, we achieved a typical…

Solar and Stellar Astrophysics · Physics 2015-06-03 Duy Cuong Nguyen , Alexis Brandeker , Ray Jayawardhana , Marten H. van Kerkwijk

A reexamination of the correspondence between 6 cm radio continuum sources and young star clusters in the Antennae galaxies indicates that 85 % of the strong thermal sources have optical counterparts, once the optical image is shifted 1.2…

Astrophysics · Physics 2009-11-07 B. C. Whitmore , Q. Zhang

We present 5.5 GHz observations with the VLA of a sample of nearby galaxies with energetic nuclear outbursts at mid-infrared (MIR) bands. These observations reach a uniform depth down to a median rms of ~10 uJy, representing one of most…

High Energy Astrophysical Phenomena · Physics 2020-06-24 B. B. Dai , X. W. Shu , N. Jiang , L. M. Dou , D. Z. Liu , C. W. Yang , F. B. Zhang , T. G. Wang

We report the results of a survey of low mass Class I protostars in the cm continuum. In the initial survey, seven sources in the Taurus star formation were observed with the VLA at 0``.25 resolution. All seven sources drive CO outflows and…

Astrophysics · Physics 2015-06-24 P. W. Lucas , Katherine M. Blundell , P. F. Roche

In order to trace the instantaneous star formation rate at high redshift, and hence help understanding the relation between the different emission mechanisms related to star formation, we combine the recent 4 Ms Chandra X-ray data and the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 S. Vattakunnel , P. Tozzi , F. Matteucci , P. Padovani , N. Miller , M. Bonzini , V. Mainieri , M. Paolillo , L. Vincoletto , W. N. Brandt , B. Luo , K. I. Kellermann , Y. Q. Xue

We present a study of the large-scale spatial distribution of 6482 RASS X-ray sources in approximately 5000 deg^2 in the direction of Orion. We examine the astrophysical properties of a sub-sample of ~100 optical counterparts, using optical…

Solar and Stellar Astrophysics · Physics 2015-06-04 K. Biazzo , J. M. Alcalá , E. Covino , M. F. Sterzik , P. Guillout , C. Chavarria-K. , A. Frasca , R. Raddi

High-mass protostars are deeply embedded in dust inside their natal cores and are not easily detectable. However, maser emission at centimeter wavelengths, owing to its high brightness, enables us to study gas kinematics in protostars'…

In a recent study, individual parallaxes were determined for many stars of the Taurus-Auriga T association that are members of the same moving group. We use these new parallaxes to re-address the issue of the relationship between classical…

Astrophysics · Physics 2009-11-13 C. Bertout , L. Siess , S. Cabrit

High-dynamic range radio observations of Westerlund 1 are presented that detect a total of 21 stars in the young massive stellar cluster, the richest population of radio emitting stars known for any young massive galactic cluster in the…

Astrophysics · Physics 2007-05-23 Sean M. Dougherty , J. Simon Clark

The Very Small Array (VSA) has been used to survey the l = 27 to 46 deg, |b|<4 deg region of the Galactic plane at a resolution of 13 arcmin. The survey consists of 44 pointings of the VSA, each with a r.m.s. sensitivity of ~90 mJy/beam.…

Observing ROSAT sources in an area covering $\sim$30% of the Southern Hemisphere, we found evidences for a great nearby association (GAYA), comprising the proposed associations of Horologium (HorA) and the eastern part of Tucana (TucA),…

Astrophysics · Physics 2007-05-23 C. A. O. Torres , G. R. Quast , R. de la Reza , L. da Silva , C. H. F. Melo

Radio galaxies with jets of relativistic particles are usually hosted by massive elliptical galaxies with active nuclei powered by accretion of interstellar matter onto a supermassive black hole. In some rare cases (<5%), their jets drive…

Astrophysics of Galaxies · Physics 2020-11-11 Pratik Dabhade , Francoise Combes , Philippe Salome , Joydeep Bagchi , Mousumi Mahato

Multi-epoch radio-interferometric observations of young stellar objects can be used to measure their displacement over the celestial sphere with a level of accuracy that currently cannot be attained at any other wavelength. In particular,…

Astrophysics of Galaxies · Physics 2009-03-05 Laurent Loinard , Luis F. Rodriguez , Amy J. Mioduszewski

The extended ROentgen Survey with an Imaging Telescope Array (eROSITA) telescope onboard the Spectrum-Roentgen-Gamma (SRG) mission has finished the first eROSITA All-Sky Survey (eRASS:1), and detected 10$^4$ galaxy clusters in the western…

According to radiative models, radio galaxies are predicted to produce gamma-rays from the earliest stages of their evolution onwards. The study of the high-energy emission from young radio sources is crucial for providing information on…

High Energy Astrophysical Phenomena · Physics 2022-01-05 Giacomo Principe , Leonardo Di Venere , Giulia Migliori , Monica Orienti , Filippo D'Ammando
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