Planets in Binary Systems Searching for High Contrast Binaries with ShaneAO Lea Hirsch 3 rd Year Graduate Student UC Berkeley Department of Astronomy

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Presentation transcript:

Planets in Binary Systems Searching for High Contrast Binaries with ShaneAO Lea Hirsch 3 rd Year Graduate Student UC Berkeley Department of Astronomy ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley

Project Overview ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley 25 pc Volume-Limited Stellar Sample: 0.55 < B-V < 1.1 (F8 – K5) Within +/- 1 M V of Main Sequence Distance < 25 pc Declination > -10°

Science Goals ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley CHARA interferometry (Raghavan 2010) V band RoboAO (Riddle+ 2014) i’ band SB2 (Kolbl+ 2014) SB1 HIRES RV Trends (But no orbital solutions or companion masses) ShaneAO K s band (arcsec)

ShaneAO Methodology ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley Finger E - W orientation of finger K s filter 3 x 30-second integrations per position 5 x 30-second skies per star Srinath+ 2014

Speckle Structure ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley July 16, 2014 HIP 64979HD HD HD HD HD HD HD HD HD HIP HD HD HIP HIP 1473

Speckle Structure ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley Nov 4, 2014 HIP HIP HD HD HD 1160HD 1461 HD 3196 HD 4356HD 4915HD 6101HD 10008HD 13798HD 16160HD HD 18632HD 20619HD HD 22484HD HD 26913HD HD 35112HD 38858HD 42618HD 43587HD 50281HD HD 60491

LOCI Algorithm ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley PSF reconstruction from reference images all images from same night reconstruct small “optimization regions” as weighted sum of reference images HD Lafrenière+ 2007

LOCI Algorithm ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley PSF reconstruction from reference images all images from same night reconstruct small “optimization regions” as weighted sum of reference images HIP

LOCI Algorithm ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley PSF reconstruction from reference images all images from same night reconstruct small “optimization regions” as weighted sum of reference images HIP

Future Outlook Improve LOCI code Astrometry : using diffraction spikes to accurately determine stars’ locations Return to these systems next year to check common proper motion for any faint companions detected ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley

Final Questions ShaneAO Workshop  Dec 17, 2014 at UCSC Lea Hirsch  UC Berkeley Why is the appearance of the speckles different from one hour/night to the next? Can ShaneAO be optimized to minimize the speckles? Is there a better algorithm than LOCI to carry out PSF reconstruction and reveal faint companions?