NOAO >   Observing Info >   Approved Programs >   2018A-0233

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Program Information for 2018A-0233


PI: Alek Kosakowski, U. of Oklahoma, alekzanderkos@ou.edu
Address: Physics Department, 440 W. Brooks Street, Norman, OK 73019 USA

CoI: Mukremin Kilic, U. of Oklahoma
CoI: Warren Brown, Harvard-Smithsonian Center for Astrophysics

Title: The ELM Survey South

Abstract: We propose to extend the ELM Survey to the southern hemisphere through ugriz photometry from the ESO ATLAS Survey Data Release 3 and additional data from the SkyMapper Survey. Our 2017B SOAR run demonstrates that our color selection works well, with a 10% success rate in finding ELMs. We identify 200 spring-sky ATLAS and SkyMapper targets brighter than g=19 mag and with colors consistent with ELM white dwarfs. Here we request 5 nights of SOAR 4m + Goodman spectrograph to follow-up these 200 targets. Along with our proposed 6.5m Magellan observations (through CfA), our goal is to observe all of the photometrically selected ELM white dwarf candidates in ATLAS and SkyMapper surveys, and constrain their orbital periods. The ELM color selection is identical to the Hypervelocity star survey. Hence, our survey will also provide the all-sky spatial distribution of hypervelocity B-stars. Given the success of the ELM Survey and the Hypervelocity star survey, our proposed survey is guaranteed to produce exciting results, including sub-hour orbital period and eclipsing detached binary white dwarfs, and will reveal the source of the anistropic distribution of hypervelocity stars in the sky.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  SOAR/Goodman -- 5n on Mar 09 - Mar 13 2018


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NOAO >   Observing Info >   Approved Programs >   2018A-0233

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