NDLI: On the lack of correlation between mg ii 2796, 2803 angstrom and lyman alpha emission in lensed star-forming galaxies

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On the lack of correlation between mg ii 2796, 2803 angstrom and lyman alpha emission in lensed star-forming galaxies

Content Provider	NASA Technical Reports Server (NTRS)
Author	Dahle, H. Bayliss, M. B. Rigby, Jane Rebecca Sharon, K. Gladders, M. D. Wuyts, E.
Copyright Year	2014
Description	We examine the Mg II 2796, 2803 Angstrom, Lyman alpha, and nebular line emission in five bright star-forming galaxies at 1.66 less than z less than 1.91 that have been gravitationally lensed by foreground galaxy clusters. All five galaxies show prominent Mg II emission and absorption in a P Cygni profile. We find no correlation between the equivalent widths of Mg II and Lyman alpha emission. The Mg II emission has a broader range of velocities than do the nebular emission line profiles; the Mg II emission is redshifted with respect to systemic by 100 to 200 km s(expâ1). When present, Lyman alpha is even more redshifted. The reddest components of Mg II and Lyman alpha emission have tails to 500-600 km s(expâ1), implying a strong outflow. The lack of correlation in the Mg II and Lyman alpha equivalent widths, the differing velocity profiles, and the high ratios of Mg II to nebular line fluxes together suggest that the bulk of Mg II emission does not ultimately arise as nebular line emission, but may instead be reprocessed stellar continuum emission.
File Size	150703
Page Count	6
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140017645
Archival Resource Key	ark:/13960/t15n1700f
Language	English
Publisher Date	2014-03-03
Access Restriction	Open
Subject Keyword	Emission Correlation Lyman Red Shift Gravitational Lenses Lyman Alpha Radiation Star Formation Galaxies Stellar Mass Emission Spectra H Ii Regions Continuums Velocity Distribution Nebulae Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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