NOAO >   Observing Info >   Approved Programs >   2019B-0344

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Program Information for 2019B-0344


PI: Silas Laycock, University of Massachusetts, Lowell, silas_laycock@uml.edu
Address: Center for Space Science and Technology, 600 Suffolk St, Lowell, MA 01854 USA

CoI: Rigel C Cappallo, University of Massachusetts, Lowell
CoI: Jun Yang, University of Utah

Title: Completing Identification of X-ray selected stars in the field of starburst galaxy IC 10

Abstract: We request 3 nights of Hydra to complete the spectral identification of X-ray selected stars in the XMM-Newton/ Chandra field containing the nearest dwarf starburst galaxy. IC 10 hosts a population of young massive stars, and X-ray binaries, that appear to be dominated by blue supergiants, in contrast to all other local group galaxies. Such objects are the immediate precursors of double-compact systems (BH+BH, NS+BH etc). The field contains some 200 X-ray point-sources, about half of which are located in the galactic foreground. Spectroscopy is the most effective way to positively identify stars in IC 10, via the -340 km/s radial velocity. With over 100 hours of total integration by Chandra and XMM-Newton, the IC10 field is one of the deepest X-ray fields in the Galactic plane. Ancillary science includes the space density of accreting and magnetically interacting binaries. In our last Hydra run (2016B) we obtained spectra for some 90 stars, while 2 Gemini GMOS runs (2018B, 2010B) have obtained spectra for $sim of the fainter targets concentrated in IC10 itself. The wide field of Hydra is needed to efficiently sweep up the remaining 64 targets at V$<. Candidate spectroscopic binaries that show line-shifts in the existing data will also be followed up.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2019B):  WIYN/HYDR -- 2n on Sep 05 - Sep 06 2019


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NOAO >   Observing Info >   Approved Programs >   2019B-0344

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