Reference : Hunting for Planets in the HL Tau Disk
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/197424
Hunting for Planets in the HL Tau Disk
English
Testi, L. mailto [ESO, Karl Schwarzschild str. 2, D-85748 Garching bei Muenchen, Germany; INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy; Excellence Cluster “Universe”, Boltzmann str. 2, D-85748 Garching bei Muenchen, Germany;]
Skemer, A. [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA;]
Henning, Th [Max Planck Institute for Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany]
Bailey, V. [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA;]
Defrere, Denis mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Hinz, Ph [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA]
Leisenring, J. [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA]
Vaz, A. [Steward Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA]
Esposito, S. [INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy]
Fontana, A. [INAF-Osservatorio Astronomico di Roma, Monte Porzio, Italy]
Marconi, A. [Universitá degli Studi di Firenze, Dipartimento di Fisica e Astronomia, Firenze, Italy]
Skrutskie, M. [University of Virginia, 530 McCormick Road, Charlottesville, VA 22904, USA]
Veillet, C. [LBT Observatory, University of Arizona, 933 N. Cherry Ave., Tucson, AZ 85721, USA)]
1-Oct-2015
Astrophysical Journal. Letters
812
Yes (verified by ORBi)
International
2041-8205
2041-8213
[en] planet–disk interactions ; protoplanetary disks ; stars: individual: HL Tau
[en] Recent ALMA images of HL Tau show gaps in the dusty disk that may be caused by planetary bodies. Given the young age of this system, if confirmed, this finding would imply very short timescales for planet formation, probably in a gravitationally unstable disk. To test this scenario, we searched for young planets by means of direct imaging in the L‧ band using the Large Binocular Telescope Interferometer mid-infrared camera. At the location of two prominent dips in the dust distribution at ˜70 AU (˜0.″5) from the central star, we reach a contrast level of ˜7.5 mag. We did not detect any point sources at the location of the rings. Using evolutionary models we derive upper limits of ˜10-15 M[SUB]Jup[/SUB] at ≤0.5-1 Ma for the possible planets. With these sensitivity limits we should have been able to detect companions sufficiently massive to open full gaps in the disk. The structures detected at millimeter wavelengths could be gaps in the distributions of large grains on the disk midplane caused by planets not massive enough to fully open the gaps. Future ALMA observations of the molecular gas density profile and kinematics as well as higher contrast infrared observations may be able to provide a definitive answer.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/197424
10.1088/2041-8205/812/2/L38
http://esoads.eso.org/abs/2015ApJ...812L..38T
http://iopscience.iop.org/article/10.1088/2041-8205/812/2/L38 -- Copyright The American Astronomical Society (AAS) and IOP Publishing Limited 2015

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