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"Auxiliary" Science with the WFIRST Microlensing Survey by Gaudi, B. Scott; Akeson, Rachel; Anderson, Jay; Bachelet, Etienne; Bennett, David P.; Bhattacharya, Aparna; Bozza, Valerio; Novati, Sebastiano Calchi; Henderson, Calen B.; Johnson, Samson A.; Kruk, Jeffrey; Lu, Jessica R.; Mao, Shude; Montet, Benjamin T.; Nataf, David M.; Penny, Matthew T.; Poleski, Radoslaw; Ranc, Clément; Sahu, Kailash; Shvartzvald, Yossi; Spergel, David N.; Suzuki, Daisuke; Stassun, Keivan G.; Street, Rachel A. is a scholarly article available to read on EtoBox.

What is "Auxiliary" Science with the WFIRST Microlensing Survey about?

The Wide Field Infrared Survey Telescope (WFIRST) will monitor $\sim 2$ deg$^2$ toward the Galactic bulge in a wide ($\sim 1-2~\mu$m) W149 filter at 15-minute cadence with exposure times of $\sim$50s for 6 seasons of 72 days each, for a total $\sim$41,000 exposures taken over $\sim$432 days, spread over the 5-year prime mission. This will be one of the deepest exposures of the sky ever taken, reaching a photon-noise photometric precision of 0.01 mag per exposure and collecting a total of $\sim 10^9$ photons over the course of the survey for a W149$_{\rm AB}\sim 21$ star. Of order $4 \times 10^7$ stars will be monitored with W149$_{\rm AB}$<21, and 10$^8$ stars with W145$_{\rm AB}$<23. The WFIRST microlensing survey will detect $\sim$54,000 microlensing events, of which roughly 1% ($\sim$500) will be due to isolated black holes, and $\sim$3% ($\sim$1600) will be due to isolated neutron stars. It will be sensitive to (effectively) isolated compact objects with masses as low as the mass of Pluto, thereby enabling a measurement of the compact object mass function over 10 orders of magnitude. Assuming photon-noise limited precision, it will detect $\sim 10^5$ transiting planets with siz

Author

Gaudi, B. Scott; Akeson, Rachel; Anderson, Jay; Bachelet, Etienne; Bennett, David P.; Bhattacharya, Aparna; Bozza, Valerio; Novati, Sebastiano Calchi; Henderson, Calen B.; Johnson, Samson A.; Kruk, Jeffrey; Lu, Jessica R.; Mao, Shude; Montet, Benjamin T.; Nataf, David M.; Penny, Matthew T.; Poleski, Radoslaw; Ranc, Clément; Sahu, Kailash; Shvartzvald, Yossi; Spergel, David N.; Suzuki, Daisuke; Stassun, Keivan G.; Street, Rachel A.

Published

2019

Language

EN