NOAO >   Observing Info >   Approved Programs >   2018A-0329

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Program Information for 2018A-0329


PI: P Frank Winkler, Middlebury College, winkler@middlebury.edu
Address: Department of Physics, Middlebury College, Middlebury, VT, 05753 USA

CoI: Knox S Long, STScI
CoI: William P Blair, Johns Hopkins U.

Title: Assessing the Rich Supernova Remnant Population in M51

Abstract: We propose a program of MOS spectroscopy of dozens of SNR candidates in M51 that we have identified through recent imaging from GMOS-N and HST. We seek to (1) confirm whether these objects are indeed SNRs through measurement of the [S II]:H-alpha line ratio, along with other lines that signify shock-heated gas; (2) look for rare ejecta-dominated remnants like Cas A through measurement of emission line widths; and (3) assess elemental abundances and their gradients in M51. All this is virgin territory, since there has been NO previous catalog of SNRs in M51. The larger context is to use the new observations, together with existing broadband HST images and a deep Chandra survey (where we have identified almost 300 X-ray sources) to study the underlying stellar population and to further elucidate the cycle of star formation and destruction in M51. Through this work we will place M51 in context with other spirals: the Milky Way and M33, both with lower star formation rates, and starburst galaxies like M83 and NGC6946 where the SFR is extremely high.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2018A):  GEM-NQ/GMOSN -- 18.1hrs band 3 (GN-2018A-Q-302 )


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NOAO >   Observing Info >   Approved Programs >   2018A-0329

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