Search: (WFRF:(Rawlings M.G.)) srt2:(2015-2019)
> (2019) >
VLA cm-wave survey ...
VLA cm-wave survey of young stellar objects in the Oph A cluster: Constraining extreme UV- And X-ray-driven disk photoevaporation: A pathfinder for Square Kilometre Array studies
-
- Coutens, A. (author)
- Université de Bordeaux,University of Bordeaux
-
- Liu, H. B. (author)
- European Southern Observatory (ESO),European Southern Observatory
-
- Jimenez-Serra, I. (author)
- Queen Mary University of London,Queen Mary University
-
show more...
-
- Bourke, T. L. (author)
- SKA Organisation,SKA Organisation, UK,National Autonomous University of Mexico,INAF - Osservatorio Astrofisico di Arcetri,European Southern Observatory
-
- Forbrich, J. (author)
- University of Hertfordshire
-
- Hoare, M. G. (author)
- University of Leeds
-
- Loinard, L. (author)
- Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico,University of Chile,INAF - Osservatorio Astrofisico di Arcetri
-
- Testi, L. (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,European Southern Observatory (ESO)
-
- Audard, M. (author)
- Université de Genève,University of Geneva
-
- Caselli, P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Institute for Extraterrestrial Physics
-
- Chacón-Tanarro, A. (author)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN),Observatorio Astronómico Nacional (OAG-IGN)
-
- Codella, C. (author)
- Université Grenoble Alpes,Grenoble Alpes University,Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,INAF - Osservatorio Astrofisico di Arcetri,University Grenoble Alpes,University College London,University of Leeds
-
- Di Francesco, J. (author)
- National Research Council Canada,University of Victoria,NRC Herzberg Institute of Astrophysics (NRC-HIA)
-
- Fontani, Francesco (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory,INAF - Osservatorio Astrofisico di Arcetri
-
- Hogerheijde, M. (author)
- Universiteit Leiden (UL),Leiden University (UL),Universiteit Van Amsterdam,University of Amsterdam,Leiden University,Netherlands Institute for Radio Astronomy (ASTRON)
-
- Johansen, A. (author)
- Lund University,Lunds universitet,Astronomi - Genomgår omorganisation,Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation,Naturvetenskapliga fakulteten,Lund Observatory - Undergoing reorganization,Department of Astronomy and Theoretical Physics - Undergoing reorganization,Faculty of Science
-
- Johnstone, D. (author)
- National Research Council Canada,University of Victoria
-
- Maddison, S. (author)
- Swinburne University of Technology
-
- Panić, O. (author)
- University of Leeds
-
- Perez, L. (author)
- Universidad de Chile (UCH),University of Chile (UCH)
-
- Podio, L. (author)
- Osservatorio Astrofisico di Arcetri,Arcetri Astrophysical Observatory
-
- Punanova, A. (author)
- Ural Federal University
-
- Rawlings, J. M.C. (author)
- University College London (UCL)
-
- Semenov, D. (author)
- Ludwig-Maximilians-Universität München,Ludwig Maximilian University of Munich,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Max Planck Institute for Astronomy,Ludwig-Maximilian University of Munich
-
- Tazzari, M. (author)
- University Of Cambridge,University of Cambridge
-
- Tobin, J. J. (author)
- National Radio Astronomy Observatory
-
- van der Wiel, M. H. D. (author)
- Netherlands Institute for Radio Astronomy (ASTRON)
-
- van Langevelde, H. J. (author)
- Joint Institute for VLBI in Europe (JIVE),University of Victoria
-
- Vlemmings, Wouter, 1974 (author)
- Chalmers University of Technology
-
- Walsh, C. (author)
- University of Leeds
-
- Wilner, D. J. (author)
- Harvard-Smithsonian Center for Astrophysics,Harvard–Smithsonian Center for Astrophysics
-
show less...
-
(creator_code:org_t)
- 2019-10-21
- 2019
- English.
-
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 631
- Related links:
-
https://research.cha... (primary) (free)
-
show more...
-
https://www.aanda.or...
-
http://dx.doi.org/10... (free)
-
https://doi.org/10.1...
-
https://research.cha...
-
https://lup.lub.lu.s...
-
show less...
Abstract
Subject headings
Close
- Observations of young stellar objects (YSOs) in centimeter bands can probe the continuum emission from growing dust grains, ionized winds, and magnetospheric activity that are intimately connected to the evolution of protoplanetary disks and the formation of planets. We carried out sensitive continuum observations toward the Ophiuchus A star-forming region, using the Karl G. Jansky Very Large Array (VLA) at 10 GHz over a field-of-view of 6′ and with a spatial resolution of θmaj ×θmin ∼ 0.′′4 × 0.′′2. We achieved a 5 μJy beam-1 rms noise level at the center of our mosaic field of view. Among the 18 sources we detected, 16 were YSOs (three Class 0, five Class I, six Class II, and two Class III) and two were extragalactic candidates. We find that thermal dust emission generally contributed less than 30% of the emission at 10 GHz. The radio emission is dominated by other types of emission, such as gyro-synchrotron radiation from active magnetospheres, free-free emission from thermal jets, free-free emission from the outflowing photoevaporated disk material, and synchrotron emission from accelerated cosmic-rays in jet or protostellar surface shocks. These different types of emission could not be clearly disentangled. Our non-detections for Class II/III disks suggest that extreme UV-driven photoevaporation is insufficient to explain disk dispersal, assuming that the contribution of UV photoevaporating stellar winds to radio flux does not evolve over time. The sensitivity of our data cannot exclude photoevaporation due to the role of X-ray photons as an efficient mechanism for disk dispersal. Deeper surveys using the Square Kilometre Array (SKA) will have the capacity to provide significant constraints to disk photoevaporation.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- Stars: formation
- Protoplanetary disks
- Radio continuum: stars
- Stars: activity
- Protoplanetary disks
- Radio continuum: stars
- Stars: activity
- Stars: formation
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
-
Coutens, A.
-
Liu, H. B.
-
Jimenez-Serra, I ...
-
Bourke, T. L.
-
Forbrich, J.
-
Hoare, M. G.
-
show more...
-
Loinard, L.
-
Testi, L.
-
Audard, M.
-
Caselli, P.
-
Chacón-Tanarro, ...
-
Codella, C.
-
Di Francesco, J.
-
Fontani, Frances ...
-
Hogerheijde, M.
-
Johansen, A.
-
Johnstone, D.
-
Maddison, S.
-
Panić, O.
-
Perez, L.
-
Podio, L.
-
Punanova, A.
-
Rawlings, J. M.C ...
-
Semenov, D.
-
Tazzari, M.
-
Tobin, J. J.
-
van der Wiel, M. ...
-
van Langevelde, ...
-
Vlemmings, Woute ...
-
Walsh, C.
-
Wilner, D. J.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Atom and Molecul ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Fusion Plasma an ...
- Articles in the publication
-
Astronomy and As ...
- By the university
-
Chalmers University of Technology
-
Lund University