Results 21 to 30 of about 2,015,457 (306)

A multi-epoch study of radio continuum emission from massive protostars [PDF]

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACT 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 of variability.
Obonyo, WO, Lumsden, SL, Hoare, MG, Kurtz, SE, Purser, SJD   +4 more
openaire   +4 more sources

RADIO CONTINUUM EMISSION AND WATER MASERS TOWARD CB 54 [PDF]

The Astronomical Journal, 2009
We present high angular resolution observations of water masers at 1.3 cm and radio continuum emission at 1.3, 3.6 and 6 cm towards the Bok globule CB 54 using the Very Large Array. At 1.3 cm, with subarsecond angular resolution, we detect a radio continuum compact source located to the south-west of the globule and spatially coincident with a mid ...
de Gregorio-Monsalvo, I., Gomez, J. F., Anglada, G., Torrelles, J. M., Kuiper, T. B. H., Suarez, O., Patel, N. A.   +6 more
openaire   +2 more sources

Radio Continuum Spectra of Planetary Nebulae

Galaxies, 2018
Radio continuum emission of planetary nebulae is a rich source of information about their structure and physical parameters. Although radio emission is well studied, planetary nebulae show higher spectral indices than expected for homogeneous sphere.
Marcin Hajduk, Peter A. M. van Hoof, Karolina Sniadkowska, Andrzej Krankowski, Leszek Błaszkiewicz, Bartosz Dabrowski, Albert A. Zijlstra   +6 more
doaj   +1 more source

Broadband VLA Spectral-line Survey of a Sample of Ionized Jet Candidates

The Astrophysical Journal Supplement Series, 2023
The study of the interaction between ionized jets, molecular outflows, and their environments is critical to understanding high-mass star formation, especially because jets and outflows are thought to be key in the transfer of angular momentum outward ...
E. Sanchez-Tovar, E. D. Araya, V. Rosero, P. Hofner, S. Kurtz   +4 more
doaj   +1 more source

A global view on star formation: The GLOSTAR Galactic plane survey

Astronomy & Astrophysics
Context. Extended radio continuum emission and its linear polarization play a key role in probing large-scale structures of synchrotron and free-free emission in the Milky Way.
Gong Y., Reich W., Rugel M. R., Menten K. M., Brunthaler A., Wyrowski F., Müller P., Dzib S. A., Urquhart J. S., Yang A. Y., Dokara R., Ortiz-León G. N., Winkel B., Kraus A., Sathyanarayanan S. P., Kim W.-J., Beuther H., Pandian J. D., Cheema A., Khan S., Veena V. S., Roy N., Carrasco-Gonzalez C., Cotton W., Csengeri T., Medina S.-N. X., Nguyen H.   +26 more
doaj   +1 more source

Nonthermal Radio Continuum Emission from Young Nearby Stars

The Astrophysical Journal, 2022
Abstract Young and magnetically active low-mass stars often exhibit nonthermal coronal radio emission owing to the gyration of electrons in their magnetized chromospheres. This emission is easily detectable at centimeter wavelengths with the current sensitivity of large radio interferometers like the Very Large Array (VLA).
Ralf Launhardt, Laurent Loinard, Sergio A. Dzib, Jan Forbrich, Geoffrey C. Bower, Thomas K. Henning, Amy J. Mioduszewski, Sabine Reffert   +7 more
openaire   +2 more sources

Flat-spectrum Radio Continuum Emission Associated with ϵ Eridani [PDF]

The Astrophysical Journal, 2019
Abstract We present Very Large Array observations at 33.0 GHz that detect emission coincident with ϵ Eridani to within 0.″07 (0.2 au at the distance of this star), with a positional accuracy of 0.″05. This result strongly supports the suggestion of previous authors that the quiescent centimeter emission comes from the star and not from a
Luis F. Rodríguez, Susana Lizano, Laurent Loinard, Miguel Chávez-Dagostino, Timothy S. Bastian, Anthony J. Beasley   +5 more
openaire   +1 more source

Radio continuum emission from knots in the DG Tauri jet [PDF]

Astronomy & Astrophysics, 2012
Context: HH 158, the jet from the young star DG Tau, is one of the few sources of its type where jet knots have been detected at optical and X-ray wavelengths. Aims: To search, using Very Large Array observations of this source, radio knots and if detected, compare them with the optical and X-ray knots.
Raga, A., Gonzalez, R., Rodriguez, L., Loinard, L., Riera, A., Zapata, L., Canto, J., Dzib, S.   +7 more
openaire   +2 more sources

Radio Emission of Nearby Early-type Galaxies in the Low and Very Low Radio Luminosity Range

The Astrophysical Journal, 2023
We analyze radio continuum emission of early-type galaxies with dynamical measurements of central supermassive black hole (SMBH) masses and well-characterized large-scale environments, but regardless of the exact level of the nuclear activity.
Anna Wójtowicz, Łukasz Stawarz, C. C. Cheung, Norbert Werner, Dominik Rudka   +4 more
doaj   +1 more source

Radio Continuum Emission and Optical Emission-Line Activity in the Nuclei of Spirals [PDF]

Symposium - International Astronomical Union, 1987
As a step towards the understanding of the phenomena occurring in galactic nuclei, we find that the ratio between the radio continuum emission of the nuclei of spiral galaxies and their optical luminosity is related to optical signs of nuclear activity, such as the emission line strengths of the H∝ and [NII] λ6584 lines.
G. Giuricin, F. Mardirossian, M. Mezzetti   +2 more
openaire   +1 more source