Direct Detections of the HR8799 planets using the LOCI algorithm on NICMOS data

Details Direct Detections of the HR8799 planets using the LOCI algorithm on NICMOS data Direct Detections of the HR8799 planets using the LOCI algorithm on NICMOS data

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010lyot.confe..24h&link_type=abstract

Proceedings of the conference In the Spirit of Lyot 2010: Direct Detection of Exoplanets and Circumstellar Disks. October 25 -

Astronomy and Astrophysics

Astronomy

Scientific paper

In 1998, the star HR8799 was observed using the coronographic camera NIC2 in a survey to search for massive Jupiters around young, nearby, main sequence stars. In 2009, more than a decade later, Lafrenière et al. revisited this data. Along with some prior knowledge of the HR8799 exoplanetary system, they developed and utilized an advanced algorithm for PSF subtraction called the LOCI (locally optimized combination of images) algorithm and detected the exoplanet HR8799 b. We revisit the same data and systematically optimize LOCI parameters. We present the direct detections of HR8799 b, c, and a possible detection of d in the same NICMOS data, and we study the effects the LOCI parameters have on the measured astrometry and photometry of each planet.

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