Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) -
Third edition -Comments and statistics

Fracassini, L. E. Pasinetti; Pastori, L.; Covino, S.; Pozzi, Andrew T. Del

doi:10.1051/0004-6361:20000451

Cited by 98 publications

(54 citation statements)

References 5 publications

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“…Indeed, even if this very nearby M2 star (3.3 pc) is identified in Simbad as a pre-main sequence star, different age estimation methods give wildly different values. Pasinetti Fracassini et al (2001) CADARS catalogue that compiles angular diameters gives very high radius estimates (respectively 0.62 and 0.56 R ), derived by Lacy (1977); Johnson & Wright (1983) from parallax and visual apparent magnitude. According to BT-SETTL models this would mean HIP114046 is aged about 30-50 Myr.…”

Section: Hip114046/gl887mentioning

confidence: 99%

High-resolution imaging of young M-type stars of the solar neighbourhood: probing for companions down to the mass of Jupiter

Delorme

Lagrange

Chauvin

et al. 2012

A&A

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Context. High-contrast imaging is a powerful technique when searching for gas giant planets and brown dwarfs orbiting at separations greater than several AU. Around solar-type stars, giant planets are expected to form by core accretion or by gravitational instability, but since core accretion is increasingly difficult as the primary star becomes lighter, gravitational instability would be a probable formation scenario for still-to-find distant giant planets around a low-mass star. A systematic survey for such planets around M dwarfs would therefore provide a direct test of the efficiency of gravitational instability. Aims. We search for gas giant planets orbiting late-type stars and brown dwarfs of the solar neighbourhood. Methods. We obtained deep high-resolution images of 16 targets with the adaptive optic system of VLT-NACO in the L band, using direct imaging and angular differential imaging. This is currently the largest and deepest survey for Jupiter-mass planets around M-dwarfs. We developed and used an integrated reduction and analysis pipeline to reduce the images and derive our 2D detection limits for each target. The typical contrast achieved is about 9 mag at 0.5 and 11 mag beyond 1 . For each target we also determine the probability of detecting a planet of a given mass at a given separation in our images. Results. We derived accurate detection probabilities for planetary companions, taking orbital projection effects into account, with in average more than 50% probability to detect a 3 M Jup companion at 10 AU and a 1.5 M Jup companion at 20 AU, bringing strong constraints on the existence of Jupiter-mass planets around this sample of young M-dwarfs.

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Section: Hip114046/gl887mentioning

confidence: 99%

High-resolution imaging of young M-type stars of the solar neighbourhood: probing for companions down to the mass of Jupiter

Delorme

Lagrange

Chauvin

et al. 2012

A&A

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“…The angular diameter of α Ser is 4.846±0.048 mas according to the interferometer measurements of Mozurkewich et al (2003). Pasinetti Fracassini et al (2001) summarizes earlier values. With the HIPPARCOS parallax, the linear radius is 11.8±0.13 solar radii.…”

Section: Introductionmentioning

confidence: 80%

Rotation and Granulation of the K2 Giant Α Ser

Gray

2016

ApJ

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The red giant α Ser was observed over 10 seasons, 2001-2010, at the Elginfield Observatory with the highresolution coudé spectrograph. Season-mean radial velocities appear to show a small secular rise ∼11±3 m s −1 yr −1 . The absolute spectroscopic radial velocity with convective blueshifts taken into account is 2730 m s −1 . Ten line-depth ratios were investigated and show that the starʼs temperature is constant with any secular variation below 1.3±1.0 K over the 11 years of observation. Fourier analysis of the line broadening yields vsini = 2.0±0.3 km s −1 and a radial-tangential macroturbulence dispersion ζ RT =4.50±0.10 km s −1 . The third-granulation-signature plot shows that the granulation velocities of αSer are only 0.55±0.10 as large as the Sunʼs. The line bisector of Fe I λ6253 has the usual "C" shape and when mapped onto the third-signature plot results in a flux deficit that is slightly broader than seen in other measured K giants. The deficit fractional area of 12.3±1.5% suggests a temperature difference between granules and lanes of 105 K as seen averaged over the stellar disk.

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“…Buscombe & Morris 1958), and v sin i was around 4 km s −1 (Gray 1981;Fekel 1997). A radius of 11 R is listed in Pasinetti Fracassini et al (2001).…”

Section: Hd 109379 (β Crv) G5 IImentioning

confidence: 99%

Crires-Pop

Lebzelter

Seifahrt

Uttenthaler

et al. 2012

A&A

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Context. New instrumental capabilities and the wealth of astrophysical information extractable from the near-infrared wavelength region have led to a growing interest in the field of high resolution spectroscopy at 1-5 μm. Aims. We aim to provide a library of observed high-resolution and high signal-to-noise-ratio near-infrared spectra of stars of various types throughout the Hertzsprung-Russell diagram. This is needed for the exploration of spectral features in this wavelength range and for comparison of reference targets with observations and models. Methods. High quality spectra were obtained using the CRIRES near-infrared spectrograph at ESO's VLT covering the range from 0.97 μm to 5.3 μm at high spectral resolution. Accurate wavelength calibration and correction for telluric lines were performed by fitting synthetic transmission spectra for the Earth's atmosphere to each spectrum individually. Results. We describe the observational strategy and the current status and content of the library which includes 13 objects. The first examples of finally reduced spectra are presented. This publication will serve as a reference paper to introduce the library to the community and explore the extensive amount of material.

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Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition -Comments and statistics

Cited by 98 publications

References 5 publications

High-resolution imaging of young M-type stars of the solar neighbourhood: probing for companions down to the mass of Jupiter

High-resolution imaging of young M-type stars of the solar neighbourhood: probing for companions down to the mass of Jupiter

Rotation and Granulation of the K2 Giant Α Ser

Crires-Pop

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