J/A+A/624/A29 Young companion candidate embedded in R CrA cloud (Cugno+, 2019)
ISPY- NaCo Imaging Survey for Planets around Young stars:
A young companion candidate embedded in the R CrA cloud.
Cugno G., Quanz S.P., Launhardt R., Musso Barcucci A., Brems S.S.,
Cheetham A., Godoy N., Kennedy G.M., Henning T., Mueller A., Olofsson J.,
Pepe F., Quirrenbach A., Reffert S., Rickman E.L., Segransan D.
<Astron. Astrophys. 624, A29 (2019)>
=2019A&A...624A..29C 2019A&A...624A..29C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, dwarfs ; Photometry, infrared
Keywords: techniques: high angular resolution -
planets and satellites: formation, planets and satellites: detection
Abstract:
Within the NaCo-ISPY exoplanet imaging program, we aim at detecting
and characterizing the population of low-mass companions at wide
separations (≳10AU). We observed R CrA twice with the NaCo instrument
at the Very Large Telescope (VLT) in the L' filter with a one year
time baseline in between. We used artificial negative signals to
determine the position and brightness of the companion and the related
uncertainties. The companion is detected at a separation of
196.8±4.5/196.6±5.9mas (18.7±1.3/18.7±1.4AU) and position
angle of 134.7±0.5°/133.7±0.7° in the first/second epoch
observation. We measure a contrast of 7.29±0.18/6.70±0.15mag with
respect to the primary. A study of the stellar proper motion rejects
the hypothesis that the signal is a background object. Depending on
the assumed age, extinction, and brightness of the primary, the
stellar companion has a mass between 0.10±0.02M☉ and
1.03+0.20-0.18M☉ range, if no contribution from
circumsecondary material is taken into account. The presence of this
companion needs to be taken into account when analyzing the complex
circumstellar environment of R CrA.
Description:
Fits images presented in the paper. For the observations, we used
VLT/NACO in the L' filter, while for the reduction and analysis we
used the PynPoint package.
Objects:
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RA (2000) DE Designation(s)
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19 01 53.69 -36 57 08.1 R CrA = HIP 93449
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 91 2 List of fits images
fits/* . 2 Individual fits images
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See also:
J/A+A/350/883 : R CrA ISOCAM observations (Olofsson+, 1999)
J/A+A/488/987 : Near-infrared survey of R CrA cloud (Haas+, 2008)
J/ApJS/194/43 : YSOs candidates and knots in CrA cloud (Peterson+, 2011)
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- 21 I2 --- Nx Number of pixels along X-axis
23- 24 I2 --- Ny Number of pixels along Y-axis
26- 35 A10 "date" Obs.date Observation date
37- 38 I2 Kibyte size Size of FITS file
40- 50 A11 --- FileName Name of FITS file, in subdirectory fits
52- 91 A40 --- Title Title of the FITS file
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Acknowledgements:
Gabriele Cugno, gabriele.cugno(at)phys.ethz.ch
(End) Patricia Vannier [CDS] 22-Feb-2019