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Observations of Binary Stars with the Differential Speckle Survey Instrument. I. Instrument Description and First Results
First results of a new speckle imaging system, the Differential SpeckleSurvey Instrument, are reported. The instrument is designed to takespeckle data in two filters simultaneously with two independent CCDimagers. This feature results in three advantages over other specklecameras: (1) twice as many frames can be obtained in the sameobservation time which can increase the signal-to-noise ratio forastrometric measurements, (2) component colors can be derived from asingle observation, and (3) the two colors give substantial leverageover atmospheric dispersion, allowing for subdiffraction-limitedseparations to be measured reliably. Fifty-four observations arereported from the first use of the instrument at theWisconsin-Indiana-Yale-NOAO 3.5 m Telescope9The WIYNObservatory is a joint facility of the University of Wisconsin-Madison,Indiana University, Yale University, and the National Optical AstronomyObservatories. in 2008 September, including seven components resolvedfor the first time. These observations are used to judge the basiccapabilities of the instrument.
| The N2K Consortium. VII. Atmospheric Parameters of 1907 Metal-rich Stars: Finding Planet-Search Targets
We report high-precision atmospheric parameters for 1907 stars in theN2K low-resolution spectroscopic survey, designed to identify metal-richFGK dwarfs likely to harbor detectable planets. Of these stars, 284 arein the ideal temperature range for planet searches,Teff<=6000 K, and have a 10% or greater probability ofhosting planets based on their metallicities. The stars in thelow-resolution spectroscopic survey should eventually yield >60 newplanets, including 8-9 hot Jupiters. Short-period planets have alreadybeen discovered orbiting the survey targets HIP 14810 and HD 149143.
| Pulkovo compilation of radial velocities for 35495 stars in a common system.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Ejderha |
| Sað Açýklýk: | 18h15m21.75s |
| Yükselim: | +57°20'07.7" |
| Görünürdeki Parlaklýk: | 8.315 |
| Uzaklýk: | 60.827 parsek |
| özdevim Sað Açýklýk: | 14.8 |
| özdevim Yükselim: | -64.5 |
| B-T magnitude: | 9.191 |
| V-T magnitude: | 8.388 |
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