807 research outputs found
Separated Fringe Packet Observations with the CHARA Array III. The Very High Eccentricity Binary HR 7345
After an eleven year observing campaign, we present the combined
visual{spectroscopic orbit of the formerly unremarkable bright star HR 7345 (HD
181655, HIP 94981, GJ 754.2). Using the Separated Fringe Packet (SFP) method
with the CHARA Array, we were able to determine a difficult to complete orbital
period of 331.609 +/- 0.004 days. The 11 month period causes the system to be
hidden from interferometric view behind the Sun for 3 years at a time. Due to
the high eccentricity orbit of about 90% of a year, after 2018 January the
periastron phase will not be observable again until late 2021. Hindered by its
extremely high eccentricity of 0.9322 +/- 0.0001, the double-lined
spectroscopic phase of HR 7345 is observable for 15 days. Such a high
eccentricity for HR 7345 places it among the most eccentric systems in catalogs
of both visual and spectroscopic orbits. For this system we determine nearly
identical component masses of 0.941 +/- 0.076 Msun and 0.926 +/- 0.075 Msun as
well as an orbital parallax of 41.08 +/- 0.77 mas.Comment: 20 pages, 3 figures, 4 table
Astrometric and Photometric Measurements of Binary Stars with Adaptive Optics: Observations from 2002
The adaptive optics system at the 3.6 m AEOS telescope was used to measure
the astrometry and differential magnitude in I-band of 56 binary stars in 2002.
The astrometric measurements will be of use for future orbital determination,
and the photometric measurements will be of use in estimating the spectral
types of the component stars. Two candidate companions were detected, but
neither is likely to be gravitationally bound. Nine systems had not been
observed in over 40 years. Eight of these are shown to share common proper
motion, while HD 182352 is shown to be a background star. One of the two
components of the HD 114378 (Alpha Com) is shown to be a variable star of
unknown type. In addition, 86 stars were unresolved and the full-width half
maxima of the images are presented.Comment: 9 pages, 1 figure, 3 Table
Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry
We present long-baseline interferometry of the Kepler exoplanet host star
HD179070 (Kepler-21) using the PAVO beam combiner at the CHARA Array. The
visibility data are consistent with a single star and exclude stellar
companions at separations ~1-1000 mas (~ 0.1-113 AU) and contrasts < 3.5
magnitudes. This result supports the validation of the 1.6 R_{earth} exoplanet
Kepler-21b by Howell et al. (2012) and complements the constraints set by
adaptive optics imaging, speckle interferometry, and radial velocity
observations to rule out false-positives due to stellar companions. We conclude
that long-baseline interferometry has strong potential to validate transiting
extrasolar planets, particularly for future projects aimed at brighter stars
and for host stars where radial velocity follow-up is not available.Comment: 5 pages, 3 figures, accepted for publication in MNRAS Letters; v2:
minor changes added in proo
From protection to inclusion. Identifying the challenges
This report has been developed in the context of the project BRIGTHER FUTURE: Innovative tools for developing full potential after early adversity, whose working team consists of the following entities: - Comune di Torino (Italy) - CORA (Spain) - PAC UK/ Family Action (United Kingdom) - Pharos Expertise Center on Health Disparities (Netherlands) - Universitat Autònoma de Barcelona (Spain) - Università di Verona (Italy) - University of Groningen (Netherlands) Editor: Beatriz San Román (Universitat Autònoma de Barcelona) Contributors: Barbara Ferrero and Sandra Patt (Comune di Torino) Ana Mª Linares, Águeda Ruibal, Elisa de Santiago and Chus Vázquez Paredes (CORA) Rebecca Wilkins and Jo Mitchell (PAC UK, Part of Family Action) Anna de Haan and Marjolein Keij (Pharos Expertise Center on Health Disparities) Chandra K. Clemente and Beatriz San Román (Universitat Autònoma de Barcelona) Federica de Cordova, Giulia Selmi and Chiara Sità (Università di Verona) Mijntje ten Brummelaar,lk Joyce Fokkens, Mónica López López, Vasiliki Soultani and Elianne Zijlstra (University of Groningen) This project has been funded with support from the European Commission
From Protection to Inclusion:A Handbook for teachers on children in alternative care and adopted children
From Protection to Inclusion:A Handbook for teachers on children in alternative care and adopted children
From Protection to Inclusion:A Handbook for teachers on children in alternative care and adopted children
This handbook has been developed in the context of the project BRIGTHER FUTURE: Innovative tools for developing full potential after early adversity, whose working team consists of the following entities: - Comune di Torino (Italy) - CORA (Spain) - PAC UK/ Family Action (United Kingdom) - Pharos Expertise Center on Health Disparities (the Netherlands) - Universitat Autònoma de Barcelona (Spain) - Università di Verona (Italy) - University of Groningen (Netherlands)Editor:Beatriz San Román (Universitat Autònoma de Barcelona)Contributors:Barbara Ferrero and Sandra Patt (Comune di Torino)Ana Mª Linares, Águeda Ruibal and Chus Vázquez Paredes (CORA)Rebecca Wilkins and Jo Mitchell (PAC UK, Part of Family Action)Anna de Haan and Marjolein Keij (Pharos Expertise Center on HealthDisparities)Chandra K. Clemente, Beatriz San Román and Aida Urrea (UniversitatAutònoma de Barcelona)Federica de Cordova, Giulia Selmi and Chiara Sità (Università di Verona)Mónica López López, Mijntje ten Brumelaar and Elianne Zijlstra (Universityof Groningen
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