Parallactic Motion for Companion Discovery: An M-Dwarf Orbiting Alcor

@article{Zimmerman2010ParallacticMF,
  title={Parallactic Motion for Companion Discovery: An M-Dwarf Orbiting Alcor},
  author={Neil Zimmerman and Ben R. Oppenheimer and Sasha Hinkley and Douglas Brenner and Ian Robert Parry and Anand Sivaramakrishnan and L. A. Hillenbrand and Charles A. Beichman and Justin R. Crepp and Gautam Vasisht and Lewis C. Roberts and Rick S. Burruss and David L. King and R{\'e}mi Soummer and Richard Dekany and Michael Shao and Antonin H. Bouchez and Jennifer E. Roberts and St. Columbia and Amnh and Caltech and I University of Cambridge and Stony Brook and CfAO and NExSci and Jpl and Stsci},
  journal={The Astrophysical Journal},
  year={2010},
  volume={709},
  pages={733-740}
}
The A5V star Alcor has an M3-M4 dwarf companion, as evidenced by a novel astrometric technique. Imaging spectroscopy combined with adaptive optics coronagraphy allowed for the detection and spectrophotometric characterization of the point source at a contrast of ~6 J- and H-band magnitudes and separation of 1'' from the primary star. The use of an astrometric pupil plane grid allowed us to determine the projected separations between the companion and the coronagraphically occulted primary star… 

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References

SHOWING 1-10 OF 49 REFERENCES
Establishing α Oph as a prototype rotator: Improved astrometric orbit
The nearby star α Oph (Ras Alhague) is a rapidly rotating A5IV star spinning at ~ 89% of its breakup velocity. This system has been imaged extensively by interferometric techniques, giving a precise
Temporal Evolution of Coronagraphic Dynamic Range and Constraints on Companions to Vega
The major obstacle to the direct detection of companions to nearby stars is the overwhelming brightness of the host star. Current instruments employing the combination of adaptive optics (AO) and
Astrometric and photometric monitoring of GQ Lupi and its sub-stellar companion
Context. Neuhauser et al. (2005, A&A, 435, L13) presented direct imaging evidence for a sub-stellar companion to the young T Tauri star GQ Lupi. Common proper motion was highly significant, but no
The Lyot Project Direct Imaging Survey of Substellar Companions: Statistical Analysis and Information from Nondetections
The Lyot project used an optimized Lyot coronagraph with Extreme Adaptive Optics at the 3.63m Advanced Electro-Optical System telescope (AEOS) to observe 86 stars from 2004 to 2007. In this paper we
Imaging Spectroscopy for Extrasolar Planet Detection
We propose that coronagraphic imaging in combination with moderate to high spectral resolution from the outset may prove more effective in both detecting extrasolar planets and characterizing them
The Palomar/Keck Adaptive Optics Survey of Young Solar Analogs: Evidence for a Universal Companion Mass Function
We present results from an adaptive optics survey for substellar and stellar companions to Sun-like stars. The survey targeted 266 F5-K5 stars in the 3 Myr-3 Gyr age range with distances of 10-190
The Gemini Planet Imager
The next major frontier in the study of extrasolar planets is direct imaging detection of the planets themselves. With high-order adaptive optics, careful system design, and advanced coronagraphy, it
Optical Images of an Exosolar Planet 25 Light-Years from Earth
TLDR
Optical observations of an exoplanet candidate, Fomalhaut b, show that the planet's mass is at most three times that of Jupiter; a higher mass would lead to gravitational disruption of the belt, matching predictions of its location.
Coldest Imaged Companion of a Sun-Like Star
We present the discovery of a brown dwarf or possible planet at a projected separation of 19 = 29 AU around the star GJ 758, placing it between the separations at which substellar companions are
GQLup and its common proper motion companion
Recently, Neuhauser et al. (2005a) presented evidence for a sub-stellar, common proper motion companion to GQLup. With two theoretical mass estimates, both below the Deuterium burning minimum mass
...
1
2
3
4
5
...