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Search: WFRF:(Serabyn Eugene) > (2020) > Keck/NIRC2 L'-Band ...

Keck/NIRC2 L'-Band Imaging of Jovian-Mass Accreting Protoplanets around PDS 70

Wang, Jason J. (author)
California Institute of Technology, USA
Ginzburg, Sivan (author)
University of California at Berkeley, USA
Ren, Bin (author)
California Institute of Technology, USA
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Wallack, Nicole (author)
California Institute of Technology, USA
Gao, Peter (author)
University of California at Berkeley, USA
Mawet, Dimitri (author)
California Institute of Technology/Jet Propulsion Laboratory, USA
Bond, Charlotte Z. (author)
University of Hawaii/W. M. Keck Observatory, USA
Cetre, Sylvain (author)
W. M. Keck Observatory, USA
Wizinowich, Peter (author)
W. M. Keck Observatory, USA
De Rosa, Robert J. (author)
European Southern Observatory, Chile
Ruane, Garreth (author)
Jet Propulsion Laboratory, USA
Liu, Michael C. (author)
University of Hawaii, USA
Absil, Olivier (author)
University of Liége, Belgium
Alvarez, Carlos (author)
W. M. Keck Observatory, USA
Baranec, Christoph (author)
University of Hawaii at Manoa, USA
Choquet, Élodie (author)
Aix Marseille University, France
Chun, Mark (author)
University of Hawaii at Manoa, USA
Defrère, Denis (author)
University of Liége, Belgium
Delorme, Jacques-Robert (author)
California Institute of Technology, USA
Duchêne, Gaspard (author)
Université Grenoble-Alpes, France
Forsberg, Pontus, 1981- (author)
Uppsala universitet,Tillämpad materialvetenskap
Ghez, Andrea (author)
University of California Los Angeles, USA
Guyon, Olivier (author)
Subaru Telescope/Steward Observatory/Astrobiology Center of NINS, Japan
Hall, Donald N. B. (author)
University of Hawaii at Manoa, USA
Huby, Elsa (author)
Observatoire de Paris, Université PSL, CNRS, Sorbonne Université, Univ. Paris Diderot, France
Jolivet, Aissa (author)
University of Liège, Belgium
Jensen-Clem, Rebecca (author)
University of California Santa Cruz, USA
Jovanovic, Nemanja (author)
California Institute of Technology, USA
Karlsson, Mikael (author)
Uppsala universitet,Tillämpad materialvetenskap
Lilley, Scott (author)
W. M. Keck Observatory, USA
Matthews, Keith (author)
California Institute of Technology, USA
Ménard, Francois (author)
Université Grenoble-Alpes, France
Meshkat, Tiffany (author)
California Institute of Technology, USA
Millar-Blanchaer, Maxwell (author)
California Institute of Technology/Jet Propulsion Laboratory, USA
Ngo, Henry (author)
NRC Herzberg Astronomy and Astrophysics, Canada
Orban de Xivry, Gilles (author)
University of Liège, Belgium
Pinte, Chistophe (author)
Monash University, Australia
Ragland, Sam (author)
W. M. Keck Observatory, USA
Serabyn, Eugene (author)
Jet Propulsion Laboratory, USA
Vargas Catalan, Ernesto, 1988- (author)
Uppsala universitet,Tillämpad materialvetenskap
Wang, Ji (author)
The Ohio State University, USA
Wetherell, Ed (author)
W. M. Keck Observatory, USA
Williams, Jonathan P. (author)
University of Hawaii, USA
Ygouf, Marie (author)
NASA Exoplanet Science Institute, USA
Zuckerman, Ben (author)
University of California Los Angeles, USA
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 (creator_code:org_t)
2020-05-18
2020
English.
In: Astronomical Journal. - : American Astronomical Society. - 0004-6256 .- 1538-3881. ; 159:6
Related links:
https://iopscience.i...
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https://urn.kb.se/re...
https://doi.org/10.3...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We present L'-band imaging of the PDS 70 planetary system with Keck/NIRC2 using the new infrared pyramid wave front sensor. We detected both PDS 70 b and c in our images, as well as the front rim of the circumstellar disk. After subtracting off a model of the disk, we measured the astrometry and photometry of both planets. Placing priors based on the dynamics of the system, we estimated PDS 70 b to have a semimajor axis of au and PDS 70 c to have a semimajor axis of au (95% credible interval). We fit the spectral energy distribution (SED) of both planets. For PDS 70 b, we were able to place better constraints on the red half of its SED than previous studies and inferred the radius of the photosphere to be 2–3 R Jup. The SED of PDS 70 c is less well constrained, with a range of total luminosities spanning an order of magnitude. With our inferred radii and luminosities, we used evolutionary models of accreting protoplanets to derive a mass of PDS 70 b between 2 and 4 M Jup and a mean mass accretion rate between 3 × 10−7 and 8 × 10−7 M Jup/yr. For PDS 70 c, we computed a mass between 1 and 3 M Jup and mean mass accretion rate between 1 × 10−7 and 5 × 10−7 M Jup/yr. The mass accretion rates imply dust accretion timescales short enough to hide strong molecular absorption features in both planets' SEDs.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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