J/ApJ/923/119 GTC/CanariCam deep MIR survey of stars within 5pc (Gauza+, 2021)
GTC/CanariCam deep mid-infrared imaging survey of northern stars within 5pc.
Gauza B., Bejar V.J.S., Rebolo R., Alvarez C., Zapatero Osorio M.R.,
Bihain G., Caballero J.A., Pinfield D.J., Telesco C.M., Packham C.
<Astrophys. J., 923, 119 (2021)>
=2021ApJ...923..119G 2021ApJ...923..119G
ADC_Keywords: Stars, variable; Infrared sources; Optical; Proper motions;
Parallaxes, trigonometric; Surveys; Spectral types
Keywords: Brown dwarfs ; Substellar companion stars ; Direct imaging ;
Extrasolar gaseous giant planets ; Low mass stars ;
Solar neighborhood
Abstract:
In this work we present the results of a direct imaging survey for
brown dwarf companions around the nearest stars at the mid-infrared
10um range (λc=8.7µm, Δλ=1.1µm) using the
CanariCam instrument on the 10.4m Gran Telescopio Canarias (GTC). We
imaged the 25 nearest stellar systems within 5pc of the Sun at
declinations δ>-25° (at least half have planets from
radial-velocity studies), reaching a mean detection limit of
11.3±0.2mag (1.5mJy) in the Si-2 8.7µm band over a range of
angular separations from 1" to 10". This would have allowed us to
uncover substellar companions at projected orbital separations between
∼2 and 50au, with effective temperatures down to 600K and masses
greater than 30MJup assuming an average age of 5Gyr and masses down
to the deuterium-burning mass limit for objects with ages <1Gyr. From
the nondetection of such companions, we determined upper limits on
their occurrence rate at depths and orbital separations yet unexplored
by deep imaging programs. For the M dwarfs, the main component of our
sample, we found with a 90% confidence level that fewer than 20% of
these low-mass stars have L- and T-type brown dwarf companions with
m≳30MJup and Teff≳600K at ∼3.5-35au projected orbital separations.
Description:
The program was carried out in queue-mode observations, starting in
2012 December 26 and ending in 2015 January 05. We used the
mid-infrared camera CanariCam operating at the Nasmyth-A focal station
of the 10.4m Gran Telescopio Canarias (GTC) at the Roque de los
Muchachos Observatory on the island of La Palma (Spain). We imaged our
targets in the 10 micron window, using a medium-band silicate filter
centered at λ=8.7um (δλ=1.1um).
See Section 3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 144 28 CanariCam target sample
figb2/* . 28 *Individual CanariCam full FOV mosaics
in FITS format
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Note on figb2/* : The full field of view of the deepest CanariCam
Si-2 filter images of the 28 observed stars in the 5pc sample. Counts
are in linear scale and in the ±7σ range relative to the
zero background. Orientation is North up and East to the left. The
coordinates correspond to the first observing epoch, taking into
account the proper motion.
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/121/2189 : Stars within 8 pc of the Sun (Oppenheimer+, 2001)
J/ApJ/670/1367 : Gemini Deep Planet Survey (Lafreniere+, 2007)
J/ApJ/687/1264 : Age estimation for solar-type dwarfs (Mamajek+, 2008)
J/A+A/511/A21 : Radial velocities of GJ876 planetary system (Correia+, 2010)
J/ApJ/719/890 : Keck radial velocities of GJ 876 (Rivera+, 2010)
J/ApJ/743/141 : T dwarf companions around M, L, T dwarfs in IR (Carson+, 2011)
J/AJ/144/64 : Solar neighborhood. XXVIII. Companions (Dieterich+, 2012)
J/ApJ/777/160 : NIR imaging survey for planets around MG stars (Biller+, 2013)
J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)
J/A+A/551/A79 : RVel periodic variations in τ Ceti (Tuomi+, 2013)
J/ApJ/794/159 : Statistical analysis of exoplanet surveys (Brandt+, 2014)
J/ApJ/785/126 : HIRES radial velocity measurements (Knutson+, 2014)
J/A+A/569/A120 : Spectra of wide companions to planet-host stars (Lodieu+ 2014)
J/A+A/577/A128 : CARMENES input catalog of M dwarfs. I (Alonso-Floriano+, 2015)
J/ApJS/216/7 : Planets Around Low-Mass Stars (PALMS). IV. (Bowler+, 2015)
J/MNRAS/448/1044 : Simulation data for planetary model systems (Hansen+, 2015)
J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/ApJ/806/248 : AO imaging of KOIs with gas giant planets (Wang+, 2015)
J/A+A/593/A38 : SPOTS II. Planets Orbiting Two Stars (Bonavita+, 2016)
J/A+A/594/A63 : International Deep Planet Survey results (Galicher+, 2016)
J/A+A/605/L11 : YZ Ceti radial velocity curve (Astudillo-Defru+, 2017)
J/A+A/602/A88 : 5 M dwarfs radial velocity curves (Astudillo-Defru+, 2017)
J/ApJ/840/70 : Historical and HST Astrometry of Sirius A,B (Bond+, 2017)
J/AJ/153/208 : LCES HIRES/Keck RV Exoplanet Survey (Butler+, 2017)
J/A+A/603/A3 : VLT/NaCo Large program. IV. Stat. analysis (Vigan+, 2017)
J/ApJ/836/77 : High-S/N optical spectra of FGKM stars (Yee+, 2017)
J/A+A/613/A25 : Radial velocity for Ross 128 (Bonfils+, 2018)
J/AJ/156/276 : Exoplanetary atm. properties with MIRI (Danielski+, 2018)
J/MNRAS/475/1960 : ESPaDOnS spectropolarimeter obs. of M dwarfs (Fouque+, 2018)
J/AJ/155/265 : Solar neighborhood. XLIV. RECONS discoveries (Henry+, 2018)
J/AJ/155/106 : New Doppler vel. measurements of GJ 876 (Millholland+, 2018)
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/other/Nat/563.365 : Barnard's star radial velocity curve (Ribas+, 2018)
J/AJ/156/286 : The LEECH exoplanet imaging survey (Stone+, 2018)
J/A+A/609/A117 : CARMENES radial velocity curves of 7 M-dwarf (Trifonov+, 2018)
J/AJ/158/187 : Confirmed members of nearby young moving groups (Baron+, 2019)
J/A+A/625/A17 : SOPHIE data of Gliese 411 (Diaz+, 2019)
J/A+A/621/A126 : CARMENES input catalogue of M dwarfs. IV. (Diez Alonso+ 2019)
J/A+A/623/A72 : Binarity of HIP stars from Gaia pm anomaly (Kervella+, 2019)
J/AJ/157/33 : RVel exploration of ε Eridani (Mawet+, 2019)
J/other/Sci/365.1441 : GJ 3512 radial velocity & light curves (Morales+, 2019)
J/AJ/158/13 : The first 300 stars observed by the GPIES (Nielsen+, 2019)
J/A+A/627/A49 : Teegarden's Star RV and Hα curves (Zechmeister+, 2019)
J/ApJS/250/29 : Search for nearby Earth analogs. III. RV sets (Feng+, 2020)
J/A+A/643/A98 : VIsual Binary Exoplanet survey with SPHERE (Hagelberg+, 2020)
J/A+A/643/A112 : CARMENES VIS RVs of 3 M dwarfs (Stock+, 2020)
J/A+A/636/A119 : YZ Ceti CARMENES & HARPS radial velocity curve (Stock+, 2020)
J/A+A/650/A201 : 10 parsec sample in the Gaia era first update (Reyle+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
13- 28 A16 --- OName Other name
30- 31 I2 h RAh Hour of right ascension (J2000)
33- 34 I2 min RAm Minute of right ascension (J2000)
36- 41 F6.3 s RAs Second of right ascension (J2000)
43 A1 --- DE- Sign of declination (J2000)
44- 45 I2 deg DEd Degree of declination (J2000)
47- 48 I2 arcmin DEm Arcminute of declination (J2000)
50- 54 F5.2 arcsec DEs Arcsecond of declination (J2000)
56- 68 A13 --- SpT Spectral type(s)
70- 74 F5.3 pc Dist [1.8/4.85] Distance
76- 81 F6.4 pc e_Dist [0.0002/0.02] Dist uncertainty
83- 88 F6.2 mas plx [206/548] Parallax
90- 93 F4.2 mas e_plx [0.02/1] Parallax uncertainty
95- 102 F8.2 mas/yr pmRA [-3867/4165] Proper motion in right ascension
(pmRA*cosDE)
104- 107 F4.2 mas/yr e_pmRA [0.02/8] pmRA uncertainty
109- 116 F8.2 mas/yr pmDE [-4777/10363] Proper motion in declination
118- 121 F4.2 mas/yr e_pmDE [0.01/8] pmDE uncertainty
123- 144 A22 --- File Name of the FITS file in subdirectory "figb2";
column added by CDS
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 19-May-2023