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Related papers: A high-frequency radio continuum study of massive …

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We present VLA radio continuum observations at 3.6 and 6 cm of a ~0.65 sq.deg. field in the galactic plane at l=+45deg . These observations are meant to be used in a comparison with ISO observations at 7 and 15 um of the same region. In…

Astrophysics · Physics 2009-10-31 Leonardo Testi , Marcello Felli , Gregory B. Taylor

We present new deep ($\sigma\sim6~\mu$Jy) radio images of the HH~124~IRS Radio Cluster at 4.8 and 7.5 GHz. We detect a total of 50 radio sources, most of them compact. Variability and spectral indices were analyzed in order to determine the…

Solar and Stellar Astrophysics · Physics 2015-06-19 Sergio Dzib , Laurent Loinard , Luis F. Rodríguez , Phillip Galli

We have analyzed sensitive high spatial resolution archival radio continuum data at 1.3, 2.0, 3.6 and 6.0 cm as well as the H2O maser molecular line data obtained using the Very Large Array (VLA) in its hybrid AB configuration toward the…

We have made a deep search for radio emission from all the northern hemisphere supersoft X-ray sources using the VLA and MERLIN telescopes, at 5 and 8.4 GHz. Three previously undetected sources: T Pyx, V1974 Cygni and RX J0019.8+2156 were…

Observations of young stellar objects (YSOs) in centimeter bands can probe the continuum emission from growing dust grains, ionized winds, and magnetospheric activity, which are intimately connected to the evolution of protoplanetary disks…

We have used the Very Large Array(VLA) in C configuration to carry out a sensitive 20cm radio survey of regions of sky that have been surveyed in the Far Infra-Red over the wavelength range 5-200 microns with ISO as part of the European…

We present results of Chandra ACIS-I and Karl G. Jansky Very Large Array (VLA) 6 cm continuum observations of the IRAS 20126+4104 massive star forming region. We detect 150 X-ray sources within the 17 arcmin x 17 arcmin ACIS-I field, and a…

Solar and Stellar Astrophysics · Physics 2015-09-29 Virginie A. Montes , Peter Hofner , Crystal Anderson , Viviana Rosero

Using observations with e-MERLIN and the VLA, together with archival data from ALMA, we obtain high-resolution radio images of two binary YSOs: L1551 IRS 5 and L1551 NE, covering a wide range of frequencies from 5 - 336 GHz, and resolving…

Observations of the starburst galaxy, M82, have been made with the VLA in its A-configuration at 15 GHz and MERLIN at 5 GHz enabling a spectral analysis of the compact radio structure on a scale of < 0.1'' (1.6 pc). Crucial to these…

Astrophysics · Physics 2009-11-07 A. R. McDonald , T. W. B. Muxlow , K. A. Wills , A. Pedlar , R. J. Beswick

As part of the GLOSTAR (GLObal view of STAR formation in the Milky Way) survey, we present the high-resolution continuum source catalog for the regions (l = 2-28, 36-40, 56-60, &|b|<1.0), observed with the Karl G. Jansky Very Large Array…

We used the Very Long Baseline Array (VLBA) and the European VLBI Network (EVN) to perform phase-referenced VLBI observations of the three most powerful maser transitions associated with the high-mass star-forming region G28.87+0.07: the…

Solar and Stellar Astrophysics · Physics 2015-06-03 J. J. Li , L. Moscadelli , R. Cesaroni , R. S. Furuya , Y. Xu , T. Usuda , K. M. Menten , M. Pestalozzi , D. Elia , E. Schisano

Searching for variability, we have observed a sample of hot post-AGB stars and young Planetary Nebulae candidates with the Very Large Array at 4.8, 8.4, and 22.4 GHz. The sources had been previously detected in the radio continuum, which is…

Solar and Stellar Astrophysics · Physics 2015-05-20 L. Cerrigone , C. Trigilio , G. Umana , C. S. Buemi , P. Leto

We present high angular resolution imaging of the quasar PSO J172.3556+18.7734 at $z=6.82$ with the Very Long Baseline Array (VLBA). This source currently holds the record of being the highest redshift radio-loud quasar. These observations…

Astrophysics of Galaxies · Physics 2021-04-14 Emmanuel Momjian , Eduardo Bañados , Christopher L. Carilli , Fabian Walter , Chiara Mazzucchelli

A new sample of candidate Compact Steep Spectrum (CSS) sources that are much weaker than the CSS source prototypes has been selected from the VLA FIRST catalogue. MERLIN `snapshot' observations of the sources at 5 GHz indicate that six of…

We present 8.4 GHz VLA A-array and 1.4 GHz VLBA results on the radio continuum emission from the highest redshift radio-loud quasar known to date, the $z=6.12$ QSO J1427+3312. The VLA observations show an unresolved steep spectrum source…

Astrophysics · Physics 2015-06-11 E. Momjian , C. L. Carilli , I. D. McGreer

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.…

We present high-angular-resolution radio continuum observations of the Quintuplet cluster, one of the most emblematic massive clusters in the Galactic centre. Data were acquired in two epochs and at 6 and 10 GHz with the Karl J. Jansky Very…

Astrophysics of Galaxies · Physics 2022-08-10 A. T. Gallego-Calvente , R. Schoedel , A. Alberdi , F. Najarro , F. Yusef-Zadeh , B. Shahzamanian , F. Nogueras-Lara

Hypercompact HII regions (HC) are regions of ionized gas associated with the early stages of high-mass star formation. With the aim of better understanding their characteristics, we studied five candidate HC HII regions. Here, we present…

Astrophysics of Galaxies · Physics 2026-05-12 I. T. Rodríguez-Esnard , S. Kurtz , J. D. Pandian , J. Franco , A. Sánchez-Monge , M. A. Trinidad , V. Migenes

We present VLA detections of radio emission in four four-image gravitational lens systems with quasar sources: HS0810+2554, RXJ0911+0511, HE0435$-$1223 and SDSSJ0924+0219, and e-MERLIN observations of two of the systems. The first three are…

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