J/MNRAS/492/431 A planetary-mass companion to a solar-type star (Bohn+, 2020)
The Young Suns Exoplanet Survey: Detection of a wide-orbit planetary-mass
companion to a solar-type Sco-Cen member.
Bohn A.J., Kenworthy M.A., Ginski C., Manara C.F., Pecaut M.J., de Boer J.,
Keller C.U., Mamajek E.E., Meshkat T., Reggiani M., Todorov K.O., Snik F.
<Mon. Not. R. Astron. Soc. 492, 431 (2020)>
=2020MNRAS.492..431B 2020MNRAS.492..431B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, pre-main sequence; Stars, K-type; Exoplanets ; HR diagrams
Keywords: astrometry - planets and satellites: detection -
planets and satellites: formation -
stars: individual: TYC 8998-760-1 - stars: pre-main-sequence -
stars: solar-type
Abstract:
The Young Suns Exoplanet Survey (YSES) consists of a homogeneous
sample of 70 young, solar-mass stars located in the Lower
Centaurus-Crux subgroup of the Scorpius-Centaurus association with an
average age of 15±3Myr. We report the detection of a co-moving
companion around the K3IV star TYC 8998-760-1 (2MASSJ13251211-6456207)
that is located at a distance of 94.6±0.3pc using SPHERE/IRDIS on
the VLT. Spectroscopic observations with VLT/X-SHOOTER constrain the
mass of the star to 1.00±0.02M☉ and an age of 16.7±1.4Myr.
The companion TYC 8998-760-1 b is detected at a projected separation
of 1.71arcsec, which implies a projected physical separation of 162au.
Photometric measurements ranging from Y to M band provide a mass
estimate of 14±3MJup by comparison to BT-Settl and AMES-dusty
isochrones, corresponding to a mass ratio of q=0.013±0.003 with
respect to the primary. We rule out additional companions to TYC
8998-760-1 that are more massive than 12MJup and farther than 12au
away from the host. Future polarimetric and spectroscopic observations
of this system with ground and space based observatories will
facilitate testing of formation and evolution scenarios shaping the
architecture of the circumstellar environment around this 'young Sun'.
Description:
Fits images corresponding to the imagery presented in the paper. The
data are obtained with VLT/SPHERE/IRDIS. The data reduction is
performed with version 0.8.1 of PynPoint. We detect a co-moving
companion around The solar-type Sco-Cen member TYC 8998-760-1 with a
mass of 14±3 Jupiter masses. The extracted astrometry and photometry
is presented in this catalogue.
Objects:
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RA (2000) DE Designation(s)
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13 25 12.13 -64 56 20.7 TYC 8998-760-1 = 2MASS J13251211-6456207
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig_7a.dat 64 100 Contrast limits of our data reduction
fig_7b.dat 66 100 Mass limits of our data reduction.
list.dat 101 4 List of fits images
fits/* . 4 Individual fits images
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Byte-by-byte Description of file: fig_7a.dat
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Bytes Format Units Label Explanations
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1- 4 F4.2 arcsec Sep Projected separation
6- 10 F5.2 mag DeltaY2 Magnitude contrast Y2 band
12- 16 F5.2 mag DeltaY3 Magnitude contrast Y3 band
18- 22 F5.2 mag DeltaJ2 Magnitude contrast J2 band
24- 28 F5.2 mag DeltaJ3 Magnitude contrast J3 band
30- 34 F5.2 mag DeltaH2 Magnitude contrast H2 band
36- 40 F5.2 mag DeltaH3 Magnitude contrast H3 band
42- 46 F5.2 mag DeltaK1 Magnitude contrast K1 band
49- 52 F4.2 mag DeltaK2 Magnitude contrast K2 band
55- 58 F4.2 mag DeltaL' Magnitude contrast L' band (1)
61- 64 F4.2 mag DeltaM' Magnitude contrast M' band (1)
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Note (1): For separations where no contrast limit is computable,
we provide 00.00.
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Byte-by-byte Description of file: fig_7b.dat
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Bytes Format Units Label Explanations
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1- 4 F4.2 arcsec Sep Projected separation
6- 10 F5.2 Mjup MassY2 Mass limit Y2 band
12- 16 F5.2 Mjup MassY3 Mass limit Y3 band
18- 22 F5.2 Mjup MassJ2 Mass limit J2 band
24- 28 F5.2 Mjup MassJ3 Mass limit J3 band
30- 34 F5.2 Mjup MassH2 Mass limit H2 band
36- 40 F5.2 Mjup MassH3 Mass limit H3 band
42- 46 F5.2 Mjup MassK1 Mass limit K1 band
48- 52 F5.2 Mjup MassK2 Mass limit K2 band
54- 59 F6.2 Mjup MassL' Mass limit L' band (1)
61- 66 F6.2 Mjup MassM' Mass limit M' band (1)
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Note (1): For separations where no mass limit is computable, we provide 000.00.
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension (J2000)
4- 5 I2 min RAm Right Ascension (J2000)
7- 11 F5.2 s RAs Right Ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 22 F4.1 arcsec DEs Declination (J2000)
24- 26 I3 --- Nx Number of pixels along X-axis
28- 30 I3 --- Ny Number of pixels along Y-axis
32- 41 A10 "date" Obs.date Observation date
43- 46 I4 Kibyte size Size of FITS file
48- 57 A10 --- FileName Name of FITS file, in subdirectory fits
59-101 A43 --- Title Title of the FITS file
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Acknowledgements:
Alexander Julian Bohn, bohn(at)strw.leidenuniv.nl
(End) A. Bohn [Leiden Obs., The Netherlands], P. Vannier [CDS] 12-Feb-2020