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Making Sense of the Rest-Frame UV Spectra of GalaxiesSpectroscopic surveys of galaxies at z=1 or more will bring the rest-frame ultraviolet into view of large, ground-based telescopes. This spectral region is rich in diagnostics, but these diagnostics have not yet been calibrated in terms of the properties of the responsible stellar population(s). Such calibrations are now possible with Hubble's Next Generation Spectral Library (NGSL). The NGSL contains UV-optical spectra (0.2- 1.0 microns) of 378 stars having a wide range in temperature, luminosity, and metallicity. Because of the broad wavelength coverage of NGSL spectra, it is possible to derive the basic stellar parameters from the optical spectral region (0.35 - 1.0 microns) and use them to calibrate UV spectral diagnostics. In this talk, I will describe the NGSL and our preliminary calibration of UV spectral diagnostics, focusing on the MgII and MgI resonance lines and the 2640-Angstrom break.
Document ID
20080044678
Acquisition Source
Goddard Space Flight Center
Document Type
Other
Authors
Heap, Sara R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 24, 2013
Publication Date
October 3, 2007
Subject Category
Astronomy
Meeting Information
Meeting: Spectroscopy in Cosmology and Galaxy Evolution Conference
Location: Granada
Country: Spain
Start Date: October 3, 2007
End Date: October 5, 2007
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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