XHIP: An extended hipparcos compilation

Anderson, Erik; Francis, Charles

doi:10.1134/s1063773712050015

Cited by 211 publications

(143 citation statements)

References 78 publications

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“…To assemble the group of field stars, we searched the Extended Hipparcos catalog of Anderson & Francis (2012) to find stars with μ, π, and γ distributed according to the presentday median velocity dispersion and spatial distribution parameters of our unbound moving groups, with a velocity dispersion of 1.6 km s −1 and spatial distribution within 11.5 pc. Our fake moving group is centered on XYZ = (−5, −5, 20) pc and UVW = (−5, −5, −5) km s −1 , a well-populated region of velocity space not populated by any known NYMG.…”

Section: Traceback Limitationsmentioning

confidence: 99%

LACEwING: A New Moving Group Analysis Code

Riedel¹,

Blunt²,

Lambrides³

et al. 2017

105

148

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We present a new nearby young moving group (NYMG) kinematic membership analysis code, LocAting Constituent mEmbers In Nearby Groups (LACEwING), a new Catalog of Suspected Nearby Young Stars, a new list of bona fide members of moving groups, and a kinematic traceback code. LACEwING is a convergence-style algorithm with carefully vetted membership statistics based on a large numerical simulation of the Solar Neighborhood. Given spatial and kinematic information on stars, LACEwING calculates membership probabilities in 13 NYMGs and three open clusters within 100 pc. In addition to describing the inputs, methods, and products of the code, we provide comparisons of LACEwING to other popular kinematic moving group membership identification codes. As a proof of concept, we use LACEwING to reconsider the membership of 930 stellar systems in the Solar Neighborhood (within 100 pc) that have reported measurable lithium equivalent widths. We quantify the evidence in support of a population of young stars not attached to any NYMGs, which is a possible sign of new as-yet-undiscovered groups or of a field population of young stars.

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Section: Traceback Limitationsmentioning

confidence: 99%

LACEwING: A New Moving Group Analysis Code

Riedel¹,

Blunt²,

Lambrides³

et al. 2017

105

148

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“…The distance and luminosity came from the result of Anderson & Francis (2012). The stellar atmospheric parameters were determined using the TGVIT (Takeda et al 2005) program based on the Kurucz (1992) atmosphere models.…”

Section: Fundamental Parametermentioning

confidence: 99%

Search for exoplanet around northern circumpolar stars

Lee

Park

Lee

et al. 2015

A&A

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Aims. This program originated as the north pole region extension of the established exoplanet survey using the 1.8 m telescope at Bohyunsan Optical Astronomy Observatory (BOAO). The aim of our paper is to find exoplanets in northern circumpolar stars with a precise radial velocity (RV) survey. Methods. We selected about 200 northern circumpolar stars with the following criteria: δ ≥ 70 • , 0.6 < B − V < 1.6, H scat < 0.05 mag, and 5.0 < m v < 7.0. The high-resolution, fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) was used for the RV survey. Chromospheric activities, the H photometry, and line bisectors were analyzed to exclude other causes for the RV variations.Results. In 2010, we started to monitor the candidates and have completed initial screening for all stars for the past five years. We present the detection of four new exoplanets. Stars HD 11755, HD 12648, HD 24064, and 8 UMi all show evidence of giant planets in Keplerian motion. The companion to HD 11755 has a minimum mass of 6.5 M Jup in a 433-day orbit with an eccentricity of 0.19. HD 12648 is orbited by a companion with a minimum mass of 2.9 M Jup , a period of 133 days, and an eccentricity of 0.04. Weak surface activity was suspected in HD 24064. However, no evidence was found to be associated with the RV variations. Its companion has a minimum mass of 9.4 M Jup , a period of 535 days, and an eccentricity of 0.35. Finally, 8 UMi has a minimum mass of 1.5 M Jup and a period of 93 days with an eccentricity of 0.06.

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“…All stellar data are taken from the extended Hipparcos compilation of Anderson & Francis (2012). Figure 1 illustrates the difficulty in using color-magnitude diagram position as a youth indicator for this volume-limited sample of B and A stars.…”

Section: Previous Methodsmentioning

confidence: 99%

The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars

Nielsen

Liu

Wahhaj³

et al. 2013

Proc. IAU

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We have carried out high contrast imaging of 70 young, nearby B and A stars to search for brown dwarf and planetary companions as part of the Gemini NICI PlanetFinding Campaign. Our survey represents the largest, deepest survey for planets around high-mass stars (≈1.5-2.5 M ⊙ ) conducted to date and includes the planet hosts β Pic and Fomalhaut. We obtained follow-up astrometry of all candidate companions within 400 AU projected separation for stars in uncrowded fields and identified new low-mass −20 M Jup and 55 +20 −19 M Jup , making this system one of the rare substellar binaries in orbit around a star. Considering the contrast limits of our NICI data and the fact that we did not detect any planets, we use high-fidelity Monte Carlo simulations to show that fewer than 20% of 2 M ⊙ stars can have giant planets greater than 4 M Jup between 59 and 460 AU at 95% confidence, and fewer than 10% of these stars can have a planet more massive than 10 M Jup between 38 and 650 AU. Overall, we find that large-separation giant planets are not common around B and A stars: fewer than 10% of B and A stars can have an analog to the HR 8799 b (7 M Jup , 68 AU) planet at 95% confidence. We also describe a new Bayesian technique for determining the ages of field B and A stars from photometry and theoretical isochrones. Our method produces more plausible ages for high-mass stars than previous age-dating techniques, which tend to underestimate stellar ages and their uncertainties.

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XHIP: An extended hipparcos compilation

Cited by 211 publications

References 78 publications

LACEwING: A New Moving Group Analysis Code

LACEwING: A New Moving Group Analysis Code

Search for exoplanet around northern circumpolar stars

The Gemini NICI Planet-Finding Campaign: The Frequency of Giant Planets around Young B and A Stars

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