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Sökning: onr:"swepub:oai:lup.lub.lu.se:13def46e-596c-4c1d-be1f-596f043978b8" > The β Pictoris syst...

The β Pictoris system : Setting constraints on the planet and the disk structures at mid-IR wavelengths with NEAR

Skaf, Nour (författare)
Paris Observatory,National Astronomical Observatory of Japan,University College London
Boccaletti, Anthony (författare)
Paris Observatory
Pantin, Eric (författare)
University of Paris-Saclay
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Thebault, Philippe (författare)
Paris Observatory
Kral, Quentin (författare)
Paris Observatory
Danielski, Camilla (författare)
CSIC Instituto de Astrofísica de Andalucía (IAA)
Galicher, Raphael (författare)
Paris Observatory
Milli, Julien (författare)
Lagrange, Anne Marie (författare)
Paris Observatory
Baruteau, Clément (författare)
Kenworthy, Matthew (författare)
Leiden University
Absil, Olivier (författare)
University of Liège
Langlois, Maud (författare)
Ecole Normale Superieure de Lyon
Olofsson, Johan (författare)
Max Planck Institute for Astronomy
Chauvin, Gael (författare)
Laboratoire Joseph-Louis Lagrange
Huelamo, Nuria (författare)
CSIC Centro de Astrobiologia (INTA)
Delorme, Philippe (författare)
University Grenoble Alpes
Charnay, Benjamin (författare)
Paris Observatory
Guyon, Olivier (författare)
National Institutes of Natural Sciences - AstroBiology Center,National Astronomical Observatory of Japan,University of Arizona
Bonnefoy, Michael (författare)
Cantalloube, Faustine (författare)
Laboratoire d'Astrophysique de Marseille (LAM)
Hoeijmakers, H. Jens (författare)
Lund University,Lunds universitet,Astrofysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Astrophysics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
Käufl, Ulli (författare)
European Southern Observatory
Kasper, Markus (författare)
European Southern Observatory
Maire, Anne Lise (författare)
Mâlin, Mathilde (författare)
Paris Observatory
Siebenmorgen, Ralf (författare)
European Southern Observatory
Snellen, Ignas (författare)
Leiden University
Zins, Gérard (författare)
European Southern Observatory
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 (creator_code:org_t)
2023-03-24
2023
Engelska.
Ingår i: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 675
  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Context. β Pictoris is a young nearby system hosting a well-resolved edge-on debris disk, along with at least two exoplanets. It offers key opportunities for carrying out detailed studies of the evolution of young planetary systems and their shaping soon after the end of the planetary formation phase. Aims. We analyzed high-contrast coronagraphic images of this system, obtained in the mid-infrared, taking advantage of the NEAR experiment using the VLT/VISIR instrument, which provides access to adaptive optics, as well as phase coronagraphy. The goal of our analysis is to investigate both the detection of the planet β Pictoris b and of the disk features at mid-IR wavelengths. In addition, by combining several epochs of observation, we expect to constrain the position of the known clumps and improve our knowledge on the dynamics of the disk. Methods. We observed the β Pictoris system over two nights in December 2019 in the 10- 12.5 μm coronagraphic filter. To evaluate the planet b flux contribution, we extracted the photometry at the expected position of the planet and compared it to the flux published in the literature. In addition, we used previous data from T-ReCS and VISIR in the mid-IR, updating the star's distance, to study the evolution of the position of the southwest clump that was initially observed in the planetary disk back in 2003. Results. While we did not detect the planet b, we were able to put constraints on the presence of circumplanetary material, ruling out the equivalent of a Saturn-like planetary ring around the planet. The disk presents several noticeable structures, including the known southwest clump. Using a 16-yr baseline, sampled with five epochs of observations, we were able to examine the evolution of the clump. We found that the clump orbits in a Keplerian motion with a semi-major axis of 56.1-0.3+0.4 au. In addition to the known clump, the images clearly show the presence of a second clump on the northeast side of the disk as well as possibly fainter and closer structures that are yet to be confirmed. Furthermore, we found correlations between the CO clumps detected with ALMA and the northeastern and southwestern clumps in the mid-IR images. Conclusions. If the circumplanetary material were located at the Roche radius, the maximum amount of dust determined from the flux upper limit around β Pictoris b would correspond to the mass of an asteroid of 5 km in diameter. Finally, the Keplerian motion of the southwestern clump is possibly indicative of a yet-to-be detected planet or signals the presence of a vortex.

Ämnesord

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

Nyckelord

Instrumentation: adaptive optics
Instrumentation: high angular resolution
Methods: observational
Planet-disk interactions

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