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J/A+A/544/A9        The International Deep Planet Survey. I. (Vigan+, 2012)

The International Deep Planet Survey. I. The frequency of wide-orbit massive planets around A-stars. Vigan A., Patience J., Marois C., Bonavita M., De Rosa R. J., Macintosh B., Song I., Doyon R., Zuckerman B., Lafreniere D., Barman T. <Astron. Astrophys. 544, A9 (2012)> =2012A&A...544A...9V
ADC_Keywords: Stars, A-type ; Planets ; Photometry, infrared Keywords: instrumentation: adaptive optics - instrumentation: high angular resolution - methods: observational - stars: imaging - methods: statistical Abstract: Breakthrough direct detections of planetary companions orbiting A-type stars confirm the existence of massive planets at relatively large separations, but dedicated surveys are required to estimate the frequency of similar planetary systems. To measure the first estimation of the giant exoplanetary systems frequency at large orbital separation around A-stars, we have conducted a deep-imaging survey of young (8-400Myr), nearby (19-84pc) A- and F-stars to search for substellar companions in the ∼10-300AU range. The sample of 42 stars combines all A-stars observed in previous AO planet search surveys reported in the literature with new AO observations from VLT/NaCo and Gemini/NIRI. It represents an initial subset of the International Deep Planet Survey (IDPS) sample of stars covering M- to B-stars. The data were obtained with diffraction-limited observations in H- and Ks-band combined with angular differential imaging to suppress the speckle noise of the central stars, resulting in typical 5-sigma detection limits in magnitude difference of 12mag at 1", 14mag at 2" and 16mag at 5" which is sufficient to detect massive planets. A detailed statistical analysis of the survey results is performed using Monte Carlo simulations. Considering the planet detections, we estimate the fraction of A-stars having at least one massive planet (3-14MJup) in the range 5-320AU to be inside 5.9-18.8% at 68% confidence, assuming a flat distribution for the mass of the planets. By comparison, the brown dwarf (15-75MJup) frequency for the sample is 2.0-8.9% at 68% confidence in the range 5-320AU. Assuming power law distributions for the mass and semimajor axis of the planet population, the AO data are consistent with a declining number of massive planets with increasing orbital radius which is distinct from the rising slope inferred from radial velocity (RV) surveys around evolved A-stars and suggests that the peak of the massive planet population around A-stars may occur at separations between the ranges probed by existing RV and AO observations. Finally, we report the discovery of three new close M-star companions to HIP 104365 and HIP 42334. Description: Information about the target sample, detection limits and the relative position and photometry of all faint sources detected during the survey. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 113 42 Target sample and properties table3.dat 70 42 Best 5-sigma detection limit for each target of the sample tablea1.dat 108 84 Properties of all detected candidate companions at the different epochs
See also: I/239 : The Hipparcos and Tycho Catalogues (ESA 1997) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 I6 --- HIP Star HIP number 8- 13 I6 --- HD Star HD number 15- 20 I6 --- HR ? Star HR number 22- 23 I2 h RAh Hour of Right Ascension (J2000.0) 25- 26 I2 min RAm Minute of Right Ascension (J2000.0) 28- 31 F4.1 s RAs Second of Right Ascension (J2000.0) 33 A1 --- DE- Sign of Declination (J2000.0) 34- 35 I2 deg DEd Degree of Declination (J2000.0) 37- 38 I2 arcmin DEm Arcminute of Declination (J2000.0) 40- 43 F4.1 arcsec DEs Arcsecond of Declination (J2000.0) 45- 48 F4.1 pc Dist Heliocentric distance 50- 55 A6 --- SpT Star spectral type 57- 59 I3 Myr Age Estimated age 61- 62 I2 --- r_Age Estimated age reference (1) 64- 76 A13 --- MG Name of the moving group or association 78- 82 F5.2 mag B-V Hipparcos B-V color index 84- 87 F4.2 mag Vmag Hipparcos V magnitude 89- 92 F4.2 mag Hmag 2MASS H magnitude 94- 97 F4.2 mag Ksmag 2MASS Ks magnitude 99-101 A3 --- IRx [yes ] Detected infrared excess 103 I1 --- r_IRx ? Detected infrared excess reference (1) 105-113 A9 --- BinInfo Binarity information
Note (1): List of age and IR excess reference as follows: 1 = Rhee et al., 2007, Cat. J/ApJ/660/1556 2 = Moor et al., 2011ApJ...740L...7M 3 = Zuckerman et al., 2011ApJ...732...61Z 4 = Su et al., 2006, Cat. J/ApJ/653/675 5 = Janson et al., 2011ApJ...736...89J 6 = Moor et al., 2006ApJ...644..525M 7 = Chauvin et al., 22010, Cat. J/A&A/509/A52 8 = Zuckerman et al., 2001ApJ...562L..87Z 9 = Tetzlaff et al., 2011, Cat. J/MNRAS/410/190 10 = Stauffer et al., 1995ApJ...454..910S 11 = see Sect. 2 of the paper
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Name Name of the star 15- 18 F4.1 mag c0.50 ? 5-sigma contrast at 0.50" (1) 20- 23 F4.1 mag c0.60 ? 5-sigma contrast at 0.60" (1) 25- 28 F4.1 mag c0.75 ? 5-sigma contrast at 0.75" (1) 30- 33 F4.1 mag c1.00 ? 5-sigma contrast at 1.00" (1) 35- 38 F4.1 mag c2.00 5-sigma contrast at 2.00" (1) 40- 43 F4.1 mag c3.00 5-sigma contrast at 3.00" (1) 45- 48 F4.1 mag c4.00 ? 5-sigma contrast at 4.00" (1) 50- 53 F4.1 mag c5.00 ? 5-sigma contrast at 5.00" (1) 55- 58 F4.1 mag c7.50 ? 5-sigma contrast at 7.50" (1) 60- 63 F4.1 mag c10.0 ? 5-sigma contrast at 10.00" (1) 65- 70 I6 --- HIP Star HIP number
Note (1): Values are given in magnitude difference in the filter of the observations: CH4s or K' for NIRI observations, Ks for NaCo observations.
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Name of the star 12 I1 --- CC [0/6] Identification number of the candidate 14- 23 A10 "YYYY-MM-DD" Date Observing UT date 25- 31 F7.2 yr Epoch Observing epoch 33- 36 A4 --- Instr Instrument name (NIRI or NaCo) 38- 41 A4 --- Filt [K' Ks CH4s] Filter of the observations 43- 48 F6.3 arcsec Sep Relative separation 50- 54 F5.3 arcsec e_Sep RMS uncertainty on separation 56- 61 F6.2 deg PA Relative position angle 63- 66 F4.2 deg e_PA RMS uncertainty on position angle 68- 72 F5.2 mag Dmag Contrast difference in filter 74- 77 F4.2 mag e_Dmag RMS uncertainty on contrast 79- 85 F7.2 AU pSep Projected physical separation 87- 90 F4.2 AU e_pSep RMS uncertainty on projected physical separation 92-101 A10 --- Status Identification status (1) 103-108 I6 --- HIP Star HIP number
Note (1): The status is either Background, Comoving or Undefined. Note that in general, only candidates with projected separations larger than 320AU were followed-up.
Acknowledgements: Arthur Vigan, arthur (at)astro.ex.ac.uk
(End) Patricia Vannier [CDS] 18-Jun-2012
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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