2011MNRAS.417.2601W

Query : 2011MNRAS.417.2601W

2011MNRAS.417.2601W - Mon. Not. R. Astron. Soc., 417, 2601-2623 (2011/November-2)

The WiggleZ dark energy survey: high-resolution kinematics of luminous star-forming galaxies.

WISNIOSKI E., GLAZEBROOK K., BLAKE C., WYDER T., MARTIN C., POOLE G.B., SHARP R., COUCH W., KACPRZAK G.G., BROUGH S., COLLESS M., CONTRERAS C., CROOM S., CROTON D., DAVIS T., DRINKWATER M.J., FORSTER K., GILBANK D.G., GLADDERS M., JELLIFFE B., JUREK R.J., LI I.-H., MADORE B., PIMBBLET K., PRACY M., WOODS D. and YEE H.K.C.

Abstract (from CDS):

We report evidence of ordered orbital motion in luminous star-forming galaxies at z ∼ 1.3. We present integral field spectroscopy (IFS) observations, performed with the OH Suppressing InfraRed Imaging Spectrograph (OSIRIS) system, assisted by laser guide star adaptive optics on the Keck telescope, of 13 star-forming galaxies selected from the WiggleZ Dark Energy Survey. Selected via ultraviolet and [O II] emission, the large volume of the WiggleZ survey allows the selection of sources which have comparable intrinsic luminosity and stellar mass to IFS samples at z > 2. Multiple 1–2 kpc size subcomponents of emission, or `clumps', are detected within the Hα spatial emission which extends over 6–10 kpc in four galaxies, resolved compact emission (r < 3 kpc) is detected in five galaxies and extended regions of Hα emission are observed in the remaining four galaxies. We discuss these data in the context of different snapshots in a merger sequence and/or the evolutionary stages of coalescence of star-forming regions in an unstable disc. We find evidence of ordered orbital motion in galaxies as expected from disc models and the highest values of velocity dispersion (σ > 100 km/s) in the most compact sources. This unique data set reveals that the most luminous star-forming galaxies at z > 1 are gaseous unstable discs indicating that a different mode of star formation could be feeding gas to galaxies at z > 1, and lending support to theories of cold dense gas flows from the intergalactic medium.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: high-redshift - galaxies: kinematics and dynamics

Nomenclature: Table 1: [WGB2011] WKNNNN NNA N=17.

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WiggleZ R01J005822757-03034040 G 00 58 22.757 -03 03 40.40           ~ 3 0
2 [WGB2011] WK0909 06R G 03 22 06.214 -15 44 34.71           ~ 3 0
3 WiggleZ R03J032450240-13550943 G 03 24 50.240 -13 55 09.43           ~ 4 0
4 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
5 WiggleZ S09J090312056-00273273 G 09 03 12.056 -00 27 32.73           ~ 3 0
6 WiggleZ S09J090933680+01074587 G 09 09 33.680 +01 07 45.87           ~ 3 0
7 WiggleZ S09J091517481+00033557 G 09 15 17.481 +00 03 35.57           ~ 3 0
8 SDSS J101757.45-002440.0 G 10 17 57.450 -00 24 40.00           ~ 5 0
9 SDSS J110405.49+011855.4 G 11 04 05.496 +01 18 55.45           ~ 4 0
10 SDSS J142538.64+004831.3 G 14 25 38.642 +00 48 31.38           ~ 4 0
11 WiggleZ S15J144102444+05480354 G 14 41 02.444 +05 48 03.54           ~ 3 0
12 SDSS J145355.24-003203.4 G 14 53 55.245 -00 32 03.47           ~ 5 0
13 [WGB2011] WK0809 01R G 21 47 00.239 +01 33 34.23           ~ 1 0
14 WiggleZ R00J232217805-05473356 G 23 22 17.805 -05 47 33.56           ~ 3 0
15 [WGB2011] WK0809 04R G 23 22 48.993 -12 15 19.43           ~ 1 0
16 SDSS J233338.38-010406.5 G 23 33 38.385 -01 04 06.54           ~ 4 0
17 [WGB2011] WK0809 05R G 23 36 18.953 -10 58 07.49           ~ 1 0
18 SDSS J234420.77-093226.2 G 23 44 20.776 -09 32 26.24           ~ 3 0

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