J/MNRAS/515/6109 CQ Tau images in near-infrared (Hammond+, 2022)
External or internal companion exciting the spiral arms in CQ Tau?
Hammond I., Christiaens V., Price D.J., Ubeira-Gabellini M.G., Baird J.,
Calcino J., Benisty M., Lodato G., Testi L., Pinte C., Toci C., Fedele D.
<Mon. Not. R. Astron. Soc., 515, 6109-6121 (2022)>
=2022MNRAS.515.6109H 2022MNRAS.515.6109H (SIMBAD/NED BibCode)
ADC_Keywords: YSOs ; Protostars ; Exoplanets ; Infrared
Keywords: techniques: image processing - planet-disc interactions -
protoplanetary discs
Abstract:
We present new high-contrast images in near-infrared wavelengths
(λc = 1.04, 1.24, 1.62, 2.18, and 3.78 um) of the young variable
star CQ Tau, aiming to constrain the presence of companions in the
protoplanetary disc. We reached a Ks-band contrast of 14 mag with
SPHERE/IRDIS at separations greater than 0.4' from the star. Our mass
sensitivity curve rules out giant planets above 4MJup immediately
outside the spiral arms at ∼60au and above 2-3MJup beyond 100au
to 5σ confidence assuming hot-start models. We do, however,
detect four spiral arms, a double-arc and evidence for shadows in
scattered light cast by a misaligned inner disc. Our observations may
be explained by an unseen close-in companion on an inclined and
eccentric orbit. Such a hypothesis would also account for the disc CO
cavity and disturbed kinematics.
Description:
Processed images obtained by NACO, SPHERE & HST (after modelling and
subtraction of the stellar signal).
Objects:
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RA (2000) DE Designation(s)
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05 35 58.46 +24 44 54.0 V* CQ Tau = HD 36910
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 161 14 List of fits images
fits/* . 14 Individual fits images
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See also:
J/A+A/648/A19 : Spiral structure in the gas disc of CQ Tau (Woelfer+, 2021)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 23 I4 --- Nx Number of pixels along X-axis
25- 28 I4 --- Ny Number of pixels along Y-axis
30- 39 A10 "date" Obs.date Observation date
41- 44 I4 Kibyte size Size of FITS file
46-105 A60 --- FileName Name of FITS file, in subdirectory fits
107-161 A55 --- Title Title of the FITS file
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Acknowledgements:
Iain Hammond, iain.hammond(at)monash.edu
(End) Iain Hammond [Monash Univ.], Patricia Vannier [CDS] 22-Feb-2023