Borislav Jovian
Number of posts : 564 Registration date : 2008-11-12
| Subject: WFCAM Transit Survey 19th July 2010, 5:55 pm | |
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Borislav Jovian
Number of posts : 564 Registration date : 2008-11-12
| Subject: Re: WFCAM Transit Survey 28th August 2010, 3:02 am | |
| http://www.ucm.es/info/carmenes/lisboa/S4posters.txt - Quote :
Title: Search for Variable Stars in the Near-Infrared with the WFCAM Transit Survey
Authors: Hristo Stoev, Luis M. Sarro, Andres Moya
Abstract: The poster presents data on stellar variability in the near-infrared as a result of data mining in the WFCAM Transit Survey as part of the Rocky Planets around Cool Stars (RoPACS) project. RoPACS project is aimed at discovering and studying extrasolar planets around M-type stars utilising the J-filter band to ensure that such cool stars are detectable out to the greatest distance. A pipeline is developed which scans for variability more than 40000 stars with recorded measurements at 900 epochs. It makes use of Fourier transform methods and least-square algorithms and as a result, the intrinsic variability parameters of the stars are provided. Examples of classical variarble stars are displayed and partial results from an extensive classification of variable stars in the field are presented. - Quote :
- Title: Spectroscopic follow-up for the WTS/RoPACS candidates
Authors: P. Cruz, D. Barrado
Abstract: This work is dedicated to spectroscopically classify planet host candidates from the WFCAM Transit Survey (WTS). The RoPACS network utilizes WTS to discover and study planets around cool stars at infrared wavelengths via the transit method. Follow-up has been performed for some of the candidates to find their spectral types and to exclude false positives. Those candidates which survive the low-resolution spectral classification undergo a more detailed follow-up with medium-resolution spectroscopy in order to detect changes in their radial velocities. Partial results from observations taken with the 3.5-meter telescope at the Calar Alto Observatory are presented here. | |
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Borislav Jovian
Number of posts : 564 Registration date : 2008-11-12
| Subject: Re: WFCAM Transit Survey 28th August 2010, 3:08 am | |
| http://www.ucm.es/info/carmenes/lisboa/S4talks.txt - Quote :
- Title: The WFCAM Transit Survey: a search for rocky planets around cool stars
Authors: J.L Birkby, S. Hodgkin, D. Pinfield, the WTS consortium & the RoPACS consortium
Abstract: The theory of core accretion makes two intriguing, observable predictions: i) that the formation of rocky/icy planets is common around M-dwarfs, and ii) that hot-Jupiters are extremely difficult to produce around low-mass stars. Furthermore, due to their small physical size and lower bolometric luminosity, M-dwarfs are up to 300 x more sensitive to planetary transits in their habitable zones than solar-type stars. We present here the WFCAM Transit Survey (WTS); an ambitious, near-infrared photometric monitoring campaign of ~6000 M-dwarfs across four 1.5 sq deg fields situated >5 degrees above and below the galactic plane. We utilise a unique opportunity provided by the highly efficient queue-scheduled operational mode of the UKIRT to observe our fields, with at least one visible at any time, when atmospheric conditions and RA coverage are unsuitable for other ongoing UKIRT programs. By probing the peak of the M-dwarf spectral energy distribution (13<17), we obtain a statistically significant sample of low-mass stars, which allows us to place meaningful constraints on the occurrence and formation of planets around M-dwarfs. The WTS has achieved one thousand epochs after 2 years in one of our target fields and will continue until April 2012. Our light curves have a per datapoint photometric precision of ~3-4 mmag for the brightest objects, with RMS scatter < 1% for J< 16, sufficient to detect Earth-like transits around M-dwarfs. I report here on the goals of our survey, our most recent results and the properties of our M-dwarf target sample. I also discuss our processing methods and how we combat the challenges encountered when observing occultations of faint red stars and the spectroscopic follow-up required to confirm them. (http://www.ast.cam.ac.uk/~sth/wts/index.html) | |
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Daniel SuperEarth
Number of posts : 272 Registration date : 2009-11-14
| Subject: Re: WFCAM Transit Survey 23rd March 2012, 11:06 pm | |
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Sirius_Alpha Admin
Number of posts : 4320 Location : Earth Registration date : 2008-04-06
| Subject: Re: WFCAM Transit Survey 4th October 2012, 8:27 pm | |
| _________________ Caps Lock: Cruise control for 'Cool'!
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| Subject: Re: WFCAM Transit Survey | |
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