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We present the first detections of thermal radio emission from the atmospheres of solar-type stars {\tau} Cet, {\eta} Cas A, and 40 Eri A. These stars all resemble the Sun in age and level of magnetic activity, as indicated by X-ray…

太阳与恒星天体物理 · 物理学 2014-06-20 Jackie Villadsen , Gregg Hallinan , Stephen Bourke , Manuel Güdel , Michael Rupen

Young and magnetically active low-mass stars often exhibit non-thermal coronal radio emission due to the gyration of electrons in their magnetized chromospheres. This emission is easily detectable at centimeter wavelengths with the current…

太阳与恒星天体物理 · 物理学 2022-06-01 R. Launhardt , L. Loinard , S. A. Dzib , J. Forbrich , G. C. Bower , Th. K. Henning , A. J. Mioduszewski , S. Reffert

V1298 Tau is a very young and magnetically active star which hosts a benchmark multi-planetary system to study planet formation and evolutionary history at the earliest stages. We selected V1298 Tau for a first targeted follow-up at radio…

We present results from the first solar full-disk F$_{10.7}$ (the radio flux at $10.7$ cm, $2.8$ GHz) image taken with the S-band receivers on the recently upgraded Karl G. Jansky Very Large Array (VLA) in order to assess the relationship…

太阳与恒星天体物理 · 物理学 2015-08-05 S. J. Schonfeld , S. M. White , C. J. Henney , C. N. Arge , R. T. J. McAteer

We present a high sensitivity radio continuum survey at 6 and 1.3$\,$cm using the Karl G. Jansky Very Large Array towards a sample of 58 high-mass star forming regions. Our sample was chosen from dust clumps within infrared dark clouds with…

We present Karl G. Jansky Very Large Array (VLA) observations of 44 GHz continuum and CO J=2-1 line emission in BR1202-0725 at z=4.7 (a starburst galaxy and quasar pair) and BRI1335-0417 at z=4.4 (also hosting a quasar). With the full 8 GHz…

星系天体物理 · 物理学 2015-06-18 J. Wagg , C. L. Carilli , M. Aravena , P. Cox , L. Lentati , R. Maiolino , R. G. McMahon , D. Riechers , F. Walter , P. Andreani , R. Hills , A. Wolfe

We present Karl G. Jansky Very Large Array (VLA) K-band (19 GHz) observations of the redshifted CO(1-0) line emission toward the radio galaxy TN J0924$-$2201 at $z=5.2$, which is one of the most distant CO-detected radio galaxies. With the…

The Jansky Very Large Array was used to observe 121 magnetic cataclysmic variables (MCVs). We report radio detections of 19 stars. Fourteen are new radio sources, increasing the number of MCVs that are radio sources by more than twofold,…

太阳与恒星天体物理 · 物理学 2017-12-06 Paul E. Barrett , Christopher Dieck , Anthony J. Beasley , Kulinder P. Singh , Paul A. Mason

We report the results of the Jansky Very Large Array (JVLA) observation of five massive protostars at 6 and 22.2 GHz. The aim of the study was to compare their current fluxes and positions with previous observations to search for evidence…

太阳与恒星天体物理 · 物理学 2021-01-06 W. O. Obonyo , S. L. Lumsden , M. G. Hoare , S. E. Kurtz , S. J. D Purser

We hereby report on a sensitive search for radio continuum observations from a sample of 34 Mira and semi-regular variable stars. The main aim of this survey was to search for thermal free-free emission from post-shock ionised gas.…

天体物理学 · 物理学 2007-05-23 Georgij M. Rudnitskij , Jessica M. Chapman

We present initial results from the 4.8 GHz Very Long Baseline Array (VLBA) survey of the JWST North Ecliptic Pole Time-Domain Field (TDF). From 106 radio sources found in the Karl G. Jansky Very Large Array observations in the TDF, we…

Using the NSF's Karl G. Jansky Very Large Array (VLA), we report six detections of CO(J=1-0) emission and one upper limit in z=2-3 galaxies originally detected in higher-J CO emission in the Atacama Large submillimeter/Millimeter Array…

We present 325 MHz (90 cm wavelength) radio observations of ultracool dwarfs TVLM 513-46546 and 2MASS J0036+1821104 using the Very Large Array (VLA) in June 2007. Ultracool dwarfs are expected to be undetectable at radio frequencies, yet…

太阳与恒星天体物理 · 物理学 2012-01-31 T. R. Jaeger , R. A. Osten , T. J. Lazio , N. Kassim , R. L. Mutel

We present coronal density profiles derived from low-frequency (80-240 MHz) imaging of three type III solar radio bursts observed at the limb by the Murchison Widefield Array (MWA). Each event is associated with a white light streamer at…

太阳与恒星天体物理 · 物理学 2018-10-17 Patrick I. McCauley , Iver H. Cairns , John Morgan

We present 33 GHz imaging for 112 pointings towards galaxy nuclei and extranuclear star-forming regions at $\approx$2" resolution using the Karl G. Jansky Very Large Array (VLA) as part of the Star Formation in Radio Survey. A comparison…

星系天体物理 · 物理学 2018-02-14 E. J. Murphy , D. Dong , E. Momjian , S. Linden , R. C. Kennicutt, , D. S. Meier , E. Schinnerer , J. L. Turner

We present detections of the CO(J= 1-0) emission line in a sample of four massive star-forming galaxies at z~1.5-2.2 obtained with the Karl G. Jansky Very Large Array (VLA). Combining these observations with previous CO(2-1) and CO(3-2)…

星系天体物理 · 物理学 2014-06-27 M. Aravena , J. A. Hodge , J. Wagg , C. L. Carilli , E. Daddi , H. Dannerbauer , L. Lentati , D. A. Riechers , M. Sargent , F. Walter

We present a deep high-resolution Chandra X-ray Observatory image data of a powerful compact radio source PKS 0023-26 associated with a quasar at redshift 0.322. The earlier studies of the optical environment suggested that the source could…

星系天体物理 · 物理学 2025-08-01 A. Siemiginowska , R. Morganti , G. Fabbiano , E. O'Sullivan , T. Oosterloo , C. Tadhunter , D. Burke

We report on multi-wavelength observations spanning radio to X-ray wavelengths of the M dwarf flare star, EV Lacertae, probing the characteristics of the outer atmospheric plasma from the upper chromosphere to the corona. We detect the star…

天体物理学 · 物理学 2011-02-11 R. A. Osten , S. L. Hawley , J. Allred , C. M. Johns-Krull , A. Brown , G. M. Harper

We report the results of a survey of radio continuum emission of Galactic Wolf-Rayet stars north of declination -46 degrees. The observations were obtained at 8.46 GHz (3.6cm) using the Very Large Array (VLA), with an angular resolution of…

天体物理学 · 物理学 2009-11-10 C. Cappa , W. M. Goss , K. A. van der Hucht

We present the results of Karl G. Jansky Very Large Array (VLA) observations to study the properties of FR0 radio galaxies, the compact radio sources associated with early-type galaxies which represent the bulk of the local radio-loud AGN…

星系天体物理 · 物理学 2018-11-28 Ranieri D. Baldi , Alessandro Capetti , Gabriele Giovannini
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