EVIDENCE FOR UBIQUITOUS COLLIMATED GALACTIC-SCALE OUTFLOWS ALONG THE STAR-FORMING SEQUENCE AT z ∼ 0.5

We analyze Mg II [lambda][lambda]2796, 2803 and Fe II [lambda][lambda]2586, 2600 absorption profiles in individual spectra of 105 galaxies at 0.3 < z < 1.4. Hubble Space Telescope Advanced Camera for Surveys imaging and our spectral analysis indicate that the outflow detection rate depends pri...

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Bibliographic Details
Published in:The Astrophysical journal 2014-10, Vol.794 (2), p.1-49
Main Authors: Rubin, Kate H R, Prochaska, J Xavier, Koo, David C, Phillips, Andrew C, Martin, Crystal L, Winstrom, Lucas O
Format: Article
Language:English
Subjects:
ABSORPTION SPECTRA
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Correlation
DENSITY
DETECTION
DISTANCE
DOPPLER EFFECT
Equivalence
EVOLUTION
GALAXIES
INCLINATION
IRON
MAGNESIUM
MASS
Outflow
RED SHIFT
SPACE
SPECTRA
Spreads
STARS
STELLAR WINDS
TELESCOPES
ULTRAVIOLET RADIATION
VELOCITY
Wind velocity
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Summary:We analyze Mg II [lambda][lambda]2796, 2803 and Fe II [lambda][lambda]2586, 2600 absorption profiles in individual spectra of 105 galaxies at 0.3 < z < 1.4. Hubble Space Telescope Advanced Camera for Surveys imaging and our spectral analysis indicate that the outflow detection rate depends primarily on galaxy orientation: winds are detected in ~89% of galaxies having inclinations (i) < 30[degrees] (face-on), while the wind detection rate is ~45% in objects having i > 50 gamma (edge-on). We find that wind velocity is correlated with galaxy M sub(*) at 3.4[sigma] significance, while outflow equivalent width is correlated with SFR at 3.5[sigma] significance, suggesting hosts with higher SFR launch more material and/or generate a larger velocity spread for the absorbing clouds. However, the gas carries sufficient energy to reach distances [gap]50 kpc, and may therefore be a viable source of material for the massive, cool circumgalactic medium around bright galaxies at z ~ 0.
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1088/0004-637X/794/2/156