Journal articles
A LOFAR detection of the low mass young star T Tau at 149 MHz
Colm P. Coughlan
1
Rachael E. Ainsworth
1
Jochen Eislöffel
2
Matthias Hoeft
2
Alexander Drabent
2
Anna M. M. Scaife
3
Tom P. Ray
1
Martin E. Bell
4
Jess W. Broderick
3
Stéphane Corbel
5, 6
Jean-Mathias Grießmeier
5, 7
Alexander J. van der Horst
8
Joeri van Leeuwen
9
Sera Markoff
8
Malgorzata Pietka
10
Adam J. Stewart
11
Ralph A. M. J. Wijers
8
Philippe Zarka
12, 5
Colm P. Coughlan 1
Author
Rachael E. Ainsworth 1
Author
Jochen Eislöffel 2
Author
Matthias Hoeft 2
Author
Jess W. Broderick 3
Author
Stéphane Corbel 5, 6
Author
Jean-Mathias Grießmeier 5, 7
Author Employer institution : Université d'Orléans
Alexander J. van der Horst 8
Author
Joeri van Leeuwen 9
Author
Sera Markoff 8
Author
Malgorzata Pietka 10
Author
Adam J. Stewart 11
Author
Ralph A. M. J. Wijers 8
Author
Philippe Zarka 12, 5
Author
1
DIAS - Dublin Institute for Advanced Studies (10 Burlington Road, Dublin 4 - Ireland)
2
TLS - Thüringer Landessternwarte Tautenburg ( Sternwarte 5, 07778 Tautenburg - Germany)
3
School of Physics and Astronomy [Southampton] (Highfield, Southampton SO17 1BJ - United Kingdom)
- University of Southampton (University Road, Southampton SO17 1BJ - United Kingdom)
4
MPA - Max-Planck-Institut für Astrophysik (Karl-Schwarzschild-Str. 1, Postfach 1317, D-85741 Garching, Germany - Germany)
- Max-Planck-Gesellschaft (Jägerstrasse, 10-11, D-10117 Berlin - Germany)
5
USN - Unité Scientifique de la Station de Nançay (18330 NANCAY - France)
- UO - Université d'Orléans : USR 704 (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- INSU - CNRS - Institut national des sciences de l'Univers : USR 704 (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris : USR 704 (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- CNRS - Centre National de la Recherche Scientifique : USR 704 (France)
6
AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation (AIM - UMR 7158 - UMR E 9005,
ex "Astrophysique Interactions Multi-échelles",
Service d'astrophysique,
CEA/Saclay,
Orme des Merisiers
F-91191 GIF SUR YVETTE CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR_7158 (France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : UMR_E_9005 (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- UPD7 - Université Paris Diderot - Paris 7 : UMR_7158 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
7
LPC2E - Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (3A, Avenue de la Recherche Scientifique 45071 Orléans cedex 2 - France)
- OSUC - Observatoire des Sciences de l'Univers en région Centre : UMS3116 (Campus Géosciences, 1A rue de la Férollerie, 45071 Orléans - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- UO - Université d'Orléans (Château de la Source - Avenue du Parc Floral - BP 6749 - 45067 Orléans cedex 2 - France)
- CNRS - Centre National de la Recherche Scientifique : UMS3116 (France)
- CNES - Centre National d’Études Spatiales [Paris] : UMR 7328 (Siège social : 2 place Maurice Quentin, 75039 Paris - France)
8
AI PANNEKOEK - Astronomical Institute Anton Pannekoek (PO Box 94249, 1090 GE Amsterdam - Netherlands)
- UvA - University of Amsterdam [Amsterdam] (Spui 21 1012 WX Amsterdam - Netherlands)
9
UvA - University of Amsterdam [Amsterdam] (Spui 21 1012 WX Amsterdam - Netherlands)
10
Oxford Astrophysics (Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK - United Kingdom)
- University of Oxford [Oxford] (Wellington Square, Oxford OX1 2JD - United Kingdom)
11
LASP - Laboratory for Atmospheric and Space Physics [Boulder] (1234 Innovation Drive, Boulder, CO 80303-7814 - United States)
- University of Colorado [Boulder] (Boulder, Colorado 80309 - United States)
12
LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique (5, place Jules Janssen 92190 MEUDON - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8109 (France)
- UPD7 - Université Paris Diderot - Paris 7 (5 rue Thomas-Mann - 75205 Paris cedex 13 - France)
- Observatoire de Paris (61 Av de l'Observatoire 75014 PARIS - France)
- PSL - Université Paris sciences et lettres (60 rue Mazarine 75006 Paris - France)
- INSU - CNRS - Institut national des sciences de l'Univers (INSU-CNRS 3 rue Michel-Ange, 75794 Paris Cedex 16 - France)
- UPMC - Université Pierre et Marie Curie - Paris 6 (4 place Jussieu - 75005 Paris - France)
Abstract : Radio observations of young stellar objects (YSOs) enable the study of ionised plasma outflows from young protostars via their free–free radiation. Previous studies of the low-mass young system T Tau have used radio observations to model the spectrum and estimate important physical properties of the associated ionised plasma (local electron density, ionised gas content and emission measure). However, without an indication of the low-frequency turnover in the free–free spectrum, these properties remain difficult to constrain. This paper presents the detection of T Tau at 149 MHz with the Low Frequency Array (LOFAR)-the first time a YSO has been observed at such low frequencies. The recovered total flux indicates that the free–free spectrum may be turning over near 149 MHz. The spectral energy distribution is fitted and yields improved constraints on local electron density ((7.2 ± 2.1) × 10 3 cm −3), ionised gas mass ((1.0 ± 1.8) × 10 −6 M ⊙) and emission measure ((1.67 ± 0.14) × 10 5 pc cm −6).
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Journal articles
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https://hal-insu.archives-ouvertes.fr/insu-01526723
Contributor : Nathalie Rouchon <>
Submitted on : Tuesday, May 23, 2017 - 2:22:34 PM
Last modification on : Thursday, September 17, 2020 - 12:29:56 PM
Long-term archiving on: : Monday, August 28, 2017 - 5:17:05 PM
Contributor : Nathalie Rouchon <>
Submitted on : Tuesday, May 23, 2017 - 2:22:34 PM
Last modification on : Thursday, September 17, 2020 - 12:29:56 PM
Long-term archiving on: : Monday, August 28, 2017 - 5:17:05 PM
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- HAL Id : insu-01526723, version 1
- DOI : 10.3847/1538-4357/834/2/206
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Citation
Colm P. Coughlan, Rachael E. Ainsworth, Jochen Eislöffel, Matthias Hoeft, Alexander Drabent, et al.. A LOFAR detection of the low mass young star T Tau at 149 MHz. The Astrophysical Journal, American Astronomical Society, 2017, 834 (2), 206 (10 p.). ⟨10.3847/1538-4357/834/2/206⟩. ⟨insu-01526723⟩
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