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

Research output: Contribution to journalArticle

Standard

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.; Liu, H. B.; Jiménez-Serra, I.; Bourke, T. L.; Forbrich, J.; Hoare, M.; Loinard, L.; Testi, L.; Audard, M.; Caselli, P.; Chacón-Tanarro, A.; Codella, C.; Di Francesco, J.; Fontani, F.; Hogerheijde, M.; Johansen, A.; Johnstone, D.; Maddison, S.; Panić, O.; Pérez, L. M.; Podio, L.; Punanova, A.; Rawlings, J. M.C.; Semenov, D.; Tazzari, M.; Tobin, J. J.; Van Der Wiel, M. H.D.; Van Langevelde, H. J.; Vlemmings, W.; Walsh, C.; Wilner, D.

In: Astronomy and Astrophysics, Vol. 631, A58, 2019.

Research output: Contribution to journalArticle

Harvard

Coutens, A, Liu, HB, Jiménez-Serra, I, Bourke, TL, Forbrich, J, Hoare, M, Loinard, L, Testi, L, Audard, M, Caselli, P, Chacón-Tanarro, A, Codella, C, Di Francesco, J, Fontani, F, Hogerheijde, M, Johansen, A, Johnstone, D, Maddison, S, Panić, O, Pérez, LM, Podio, L, Punanova, A, Rawlings, JMC, Semenov, D, Tazzari, M, Tobin, JJ, Van Der Wiel, MHD, Van Langevelde, HJ, Vlemmings, W, Walsh, C & Wilner, D 2019, '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', Astronomy and Astrophysics, vol. 631, A58. https://doi.org/10.1051/0004-6361/201935340

APA

Coutens, A., Liu, H. B., Jiménez-Serra, I., Bourke, T. L., Forbrich, J., Hoare, M., Loinard, L., Testi, L., Audard, M., Caselli, P., Chacón-Tanarro, A., Codella, C., Di Francesco, J., Fontani, F., Hogerheijde, M., Johansen, A., Johnstone, D., Maddison, S., Panić, O., ... Wilner, D. (2019). 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. Astronomy and Astrophysics, 631, [A58]. https://doi.org/10.1051/0004-6361/201935340

CBE

Coutens A, Liu HB, Jiménez-Serra I, Bourke TL, Forbrich J, Hoare M, Loinard L, Testi L, Audard M, Caselli P, Chacón-Tanarro A, Codella C, Di Francesco J, Fontani F, Hogerheijde M, Johansen A, Johnstone D, Maddison S, Panić O, Pérez LM, Podio L, Punanova A, Rawlings JMC, Semenov D, Tazzari M, Tobin JJ, Van Der Wiel MHD, Van Langevelde HJ, Vlemmings W, Walsh C, Wilner D. 2019. 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. Astronomy and Astrophysics. 631:Article A58. https://doi.org/10.1051/0004-6361/201935340

MLA

Vancouver

Author

Coutens, A. ; Liu, H. B. ; Jiménez-Serra, I. ; Bourke, T. L. ; Forbrich, J. ; Hoare, M. ; Loinard, L. ; Testi, L. ; Audard, M. ; Caselli, P. ; Chacón-Tanarro, A. ; Codella, C. ; Di Francesco, J. ; Fontani, F. ; Hogerheijde, M. ; Johansen, A. ; Johnstone, D. ; Maddison, S. ; Panić, O. ; Pérez, L. M. ; Podio, L. ; Punanova, A. ; Rawlings, J. M.C. ; Semenov, D. ; Tazzari, M. ; Tobin, J. J. ; Van Der Wiel, M. H.D. ; Van Langevelde, H. J. ; Vlemmings, W. ; Walsh, C. ; Wilner, D. / 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. In: Astronomy and Astrophysics. 2019 ; Vol. 631.

RIS

TY - JOUR

T1 - VLA cm-wave survey of young stellar objects in the Oph A cluster

T2 - Constraining extreme UV- And X-ray-driven disk photoevaporation: A pathfinder for Square Kilometre Array studies

AU - Coutens, A.

AU - Liu, H. B.

AU - Jiménez-Serra, I.

AU - Bourke, T. L.

AU - Forbrich, J.

AU - Hoare, M.

AU - Loinard, L.

AU - Testi, L.

AU - Audard, M.

AU - Caselli, P.

AU - Chacón-Tanarro, A.

AU - Codella, C.

AU - Di Francesco, J.

AU - Fontani, F.

AU - Hogerheijde, M.

AU - Johansen, A.

AU - Johnstone, D.

AU - Maddison, S.

AU - Panić, O.

AU - Pérez, L. M.

AU - Podio, L.

AU - Punanova, A.

AU - Rawlings, J. M.C.

AU - Semenov, D.

AU - Tazzari, M.

AU - Tobin, J. J.

AU - Van Der Wiel, M. H.D.

AU - Van Langevelde, H. J.

AU - Vlemmings, W.

AU - Walsh, C.

AU - Wilner, D.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

KW - Protoplanetary disks

KW - Radio continuum: stars

KW - Stars: activity

KW - Stars: formation

U2 - 10.1051/0004-6361/201935340

DO - 10.1051/0004-6361/201935340

M3 - Article

AN - SCOPUS:85074453310

VL - 631

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 1432-0746

M1 - A58

ER -