Surface Brightness of Starbursts at Low and High Redshifts | Zendy

D. W. Weedman | Zendy; Jeffrey B. Wolovitz | Zendy; Matthew A. Bershady | Zendy; Donald P. Schneider | Zendy

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Surface Brightness of Starbursts at Low and High Redshifts

Author(s) -

D. W. Weedman,

Jeffrey B. Wolovitz,

Matthew A. Bershady,

Donald P. Schneider

Publication year - 1998

Publication title -

the astronomical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.61

H-Index - 271

eISSN - 1538-3881

pISSN - 0004-6256

DOI - 10.1086/300553

Subject(s) - redshift , physics , surface brightness , astrophysics , hubble deep field , brightness , galaxy , rest frame , luminosity , star formation , ultraviolet , hubble ultra deep field , astronomy , optics

Observations in the rest frame ultraviolet from various space missions areused to define the nearby starburst regions having the highest surfacebrightness on scales of several hundred pc. The bright limit is found to be6x10^-16 ergs/cm^2-s-A-arcsec^2 for rest frame wavelength of 1830 A. Surfacebrightness in the brightest pixel is measured for 18 galaxies in the HubbleDeep Field having z > 2.2. After correcting for cosmological dimming, we findthat the high redshift starbursts have intrinsic ultraviolet surface brightnessthat is typically four times brighter than low redshift starbursts. It is notpossible to conclude whether this difference is caused by decreased dustobscuration in the high redshift starburst regions or by intrinsically moreintense star formation. Surface brightness enhancement of starburst regions maybe the primary factor for explaining the observed increase with redshift of theultraviolet luminosity arising from star formation.Comment: accepted for publication in AJ; 11 pages text, 3 tables, 3 figures (embedded

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