NOAO >   Observing Info >   Approved Programs >   2020A-0412

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Program Information for 2020A-0412


PI: Adam Burgasser, UC San Diego, aburgasser@ucsd.edu
Address: Physics Department, UCSD Mail Code 0424, 9500 Gilman Drive, La Jolla, California 92093 United States

CoI: Andrea De Luca, INAF/IASF Milano
CoI: Beate Stelzer,
CoI: Daniele Pizzocaro, INAF/IASF Milano

Title: X-ray Superflares from L dwarfs: Are they Young or Old?

Abstract: Stellar superflares are transient bursts with total energies $>$10$^{33}$~erg, which play an important role in planetary habitability and the limiting strengths of stellar surface magnetic fields. Remarkably, several of these superflares originate from the coldest, least massive, and generally least active stars, the L dwarfs, with four white-light superflares detected over the past few years. By cross- matching the XXM-Newton Serendipitous Sky Survey with brown dwarfs uncovered in the Dark Energy Survey, we have uncovered the first X-ray flaring L dwarfs, including two X-ray superflares. We request infrared spectra with SOAR/ARCoIRIS to observe all three X-ray flaring and one optically-flaring L dwarf to determine whether these sources are young or old, as a first step toward determining the origin of extremely energetic bursts from unenergetic stars.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2020A):  SOAR/TSpec -- 1n on Jun 06 - Jun 07 2020


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NOAO >   Observing Info >   Approved Programs >   2020A-0412

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