2014MNRAS.437.1070G

Query : 2014MNRAS.437.1070G

2014MNRAS.437.1070G - Mon. Not. R. Astron. Soc., 437, 1070-1095 (2014/January-2)

DYNAMO - I. A sample of Hα-luminous galaxies with resolved kinematics.

GREEN A.W., GLAZEBROOK K., McGREGOR P.J., DAMJANOV I., WISNIOSKI E., ABRAHAM R.G., COLLESS M., SHARP R.G., CRAIN R.A., POOLE G.B. and McCARTHY P.J.

Abstract (from CDS):

DYNAMO is a multiwavelength, spatially resolved survey of local (z ∼ 0.1) star-forming galaxies designed to study evolution through comparison with samples at z ≃ 2. Half of the sample has integrated Hα luminosities of >1042erg/s, the typical lower limit for resolved spectroscopy at z ≃ 2. The sample covers a range in stellar mass (109-1011M☉) and star formation rate (0.2-100M☉/yr). In this first paper of a series, we present integral-field spectroscopy of Hα emission for the sample of 67 galaxies. We infer gas fractions in our sample as high as ≃ 0.8, higher than typical for local galaxies. Gas fraction correlates with stellar mass in galaxies with star formation rates below 10M☉/yr, as found by COLDGASS, but galaxies with higher star formation rates have higher than expected gas fractions. There is only a weak correlation, if any, between gas fraction and gas velocity dispersion. Galaxies in the sample visually classified as disc-like are offset from the local stellar mass Tully-Fisher relation to higher circular velocities, but this offset vanishes when both gas and stars are included in the baryonic Tully-Fisher relation. The mean gas velocity dispersion of the sample is ≃ 50km/s, and V/σ ranges from 2 to 10 for most of the discs, similar to `turbulent' galaxies at high redshift. Half of our sample show disc-like rotation, while ∼ 20 percent show no signs of rotation. The division between rotating and non-rotating is approximately equal for the sub-samples with either star formation rates >10M☉/yr, or specific star formation rates typical of the star formation `main sequence' at z ≃ 2. Across our whole sample, we find good correlation between the dominance of `turbulence' in galaxy discs (as expressed by V/σ) and gas fraction as has been predicted for marginally stable Toomre discs. Comparing our sample with many others at low- and high-redshift reveals a correlation between gas velocity dispersion and star formation rate. These findings suggest the DYNAMO discs are excellent candidates for local galaxies similar to turbulent z ≃ 2 disc galaxies.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

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

VizieR on-line data: <Available at CDS (J/MNRAS/437/1070): table2.dat table3.dat table4.dat table5.dat>

Nomenclature: Table 3: [GGM2014] A NN-N N=67.

Simbad objects: 67

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Number of rows : 67
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 SDSS J002808.64-003910.1 EmG 00 28 08.643 -00 39 10.14           ~ 5 0
2 2MASX J00432447+0000584 EmG 00 43 24.4368240648 +00 00 59.122056744   16.65 16.30     ~ 19 0
3 LEDA 1129743 EmG 00 54 53.5627334904 -00 59 08.590622604           ~ 9 0
4 CAIRNS J005601.34+004330.0 Sy1 00 56 01.3391187840 +00 43 30.217577772     18.85     ~ 8 0
5 2MASX J03271857-0028309 Sy1 03 27 18.5776431984 -00 28 30.369065556     19.43     ~ 10 0
6 2SLAQ J034857.51-004254.2 EmG 03 48 57.4889211408 -00 42 54.063974232           ~ 8 0
7 SDSS J040203.18-051629.1 EmG 04 02 03.189 -05 16 28.89           ~ 4 0
8 LEDA 1046062 EmG 04 02 28.8843344040 -05 20 24.437390028           ~ 6 0
9 2MASX J04024247-0644478 EmG 04 02 42.5164957656 -06 44 47.746600224           ~ 10 0
10 [GGM2014] C 04-2 EmG 04 04 25.99237 -05 22 13.3283           ~ 5 0
11 SDSS J040530.53-054322.0 EmG 04 05 30.5372744784 -05 43 21.916244532           ~ 6 0
12 2MASX J04082867-0452199 EmG 04 08 28.6442114160 -04 52 19.913034864           ~ 7 0
13 LEDA 1036921 EmG 04 10 09.30054 -06 05 10.5276           ~ 5 0
14 2MASX J04121974-0554484 EmG 04 12 19.7115678288 -05 54 48.706034832           ~ 22 0
15 SDSS J080412.52+070958.5 EmG 08 04 12.5050553616 +07 09 58.974947748           ~ 5 0
16 [GGM2014] G 08-4 EmG 08 27 06.707 +04 19 23.11           ~ 5 0
17 2MASX J08310194+0403175 EmG 08 31 01.93132 +04 03 18.8910           ~ 12 0
18 SDSS J083751.79+061609.5 EmG 08 37 51.79589 +06 16 09.6019           ~ 2 0
19 SDSS J084506.47+024615.4 EmG 08 45 06.4770820632 +02 46 15.322498608           ~ 7 0
20 LEDA 1366257 EmG 08 47 35.36070 +09 31 02.5685           ~ 8 0
21 2MFGC 6907 EmG 08 48 08.1204503184 +04 15 33.603068520           ~ 11 0
22 [GGM2014] G 08-2 EmG 08 53 47.7211111320 +06 51 06.840676764           ~ 4 0
23 [GGM2014] B 08-4 EmG 08 54 03.86643 +07 34 52.2173           ~ 4 0
24 IRAS F08516+0657 EmG 08 54 18.741 +06 46 20.57           ~ 17 0
25 [GGM2014] G 09-1 EmG 09 12 10.9676930496 +10 04 12.218473128           ~ 5 0
26 NVSS J091929+061052 rG 09 19 29.430 +06 10 55.32           ~ 17 0
27 SDSS J093412.85+104035.2 EmG 09 34 12.845 +10 40 35.25           ~ 6 0
28 2MASX J10194030-0026243 Sy1 10 19 40.2915106608 -00 26 24.669770568   18.79 18.25 17.006   ~ 7 0
29 [GGM2014] G 10-1 EmG 10 21 42.4734521400 +12 45 18.734074992           ~ 9 0
30 [GGM2014] F 10-1 EmG 10 27 15.47521 +06 50 03.6442           ~ 5 0
31 SDSS J103235.52+070606.8 EmG 10 32 35.5308199176 +07 06 06.930787716           ~ 7 0
32 [GGM2014] H 10-2 EmG 10 44 31.7601531048 +12 09 25.471260432           ~ 11 0
33 2dFGRS TGN431Z100 EmG 10 46 38.355 +01 48 30.65   18.125   17.118   ~ 6 0
34 2dFGRS TGN296Z073 EmG 10 47 46.93695 -00 22 04.2364   18.399   17.272   ~ 6 0
35 LEDA 1370395 EmG 10 59 18.14127 +09 48 37.2362           ~ 5 0
36 LEDA 1230818 EmG 11 16 35.58121 +02 33 48.1643           ~ 6 0
37 2MASX J11352019+1112420 EmG 11 35 20.1567337776 +11 12 41.996752092           ~ 6 0
38 2MASX J12253421-0250290 Sy1 12 25 34.2556586928 -02 50 29.076042480   16.728   16.587   ~ 20 0
39 2MASX J13263947+0130019 EmG 13 26 39.4226371128 +01 30 01.350768744   16.918   16.032   ~ 15 0
40 Z 16-82 EmG 13 30 07.0321552320 +00 31 52.482490572   15.5   15.926   ~ 29 0
41 2dFGRS TGN401Z082 EmG 13 30 47.0969341800 +01 42 31.134265848   18   16.377   ~ 13 0
42 LEDA 3396691 EmG 13 43 00.4882367832 +03 53 19.349208420           ~ 6 0
43 SDSS J135022.74-025157.5 EmG 13 50 22.7373097704 -02 51 57.591223992           ~ 13 0
44 [GGM2014] A 13-2 EmG 13 52 32.501 +02 43 30.62           ~ 4 0
45 GAMA 48740 EmG 14 33 42.56783 -00 48 01.2468           ~ 13 0
46 2MASX J14445202+0436538 EmG 14 44 52.04301 +04 36 54.5218           ~ 6 0
47 2MASX J14460854+0051512 Sy1 14 46 08.5749031752 +00 51 51.650091576     18.67     ~ 15 0
48 SDSS J145428.32+004434.4 Sy1 14 54 28.3149364800 +00 44 34.491694272     18.52     ~ 16 0
49 SDSS J145435.35-020049.6 EmG 14 54 35.3613337104 -02 00 49.772188548           ~ 5 0
50 [GGM2014] B 15-2 EmG 15 11 29.57202 -02 05 21.1427           ~ 5 0
51 SDSS J153435.39-002844.5 EmG 15 34 35.40258 -00 28 44.5516   17.07   15.65   ~ 19 0
52 [GGM2014] D 15-2 EmG 15 43 05.2629707952 -01 46 42.464067240           ~ 5 0
53 [GGM2014] D 15-1 EmG 15 43 07.0859408760 -01 08 03.963969456           ~ 6 0
54 SDSS J154413.93+034550.7 EmG 15 44 13.91916 +03 45 50.6948           ~ 6 0
55 6dFGS gJ203724.6-062201 EmG 20 37 24.583 -06 22 00.32   18.09   17.05   ~ 9 0
56 SDSS J204402.91-064657.9 EmG 20 44 02.9077718016 -06 46 57.910361160           ~ 20 0
57 2MASS J20520909-0030393 EmG 20 52 09.0841852101 -00 30 39.320143973         16.662 ~ 8 0
58 [GGM2014] C 20-2 EmG 20 52 59.0557711560 -06 04 28.598243844           ~ 4 0
59 LEDA 1036452 EmG 20 59 12.10502 -06 07 40.6415           ~ 6 0
60 LEDA 1151093 EmG 21 17 33.4976241600 -00 08 04.988044896           ~ 26 0
61 SDSS J211911.80+010832.1 EmG 21 19 11.8119276384 +01 08 32.225532252           ~ 6 0
62 2MASX J21391977-0841430 EmG 21 39 19.7605337352 -08 41 42.619043436           ~ 6 0
63 SDSS J221614.51+122343.8 EmG 22 16 14.5159060608 +12 23 43.843994700           ~ 10 0
64 LEDA 1000877 EmG 22 37 45.26113 -08 39 22.5149           ~ 6 0
65 2MASX J22394936-0804178 EmG 22 39 49.3388472072 -08 04 18.053996268           ~ 9 0
66 2MASX J23495770+0005227 Sy1 23 49 57.739 +00 05 22.89     18.44     ~ 6 0
67 [GGM2014] E 23-1 EmG 23 58 33.9069816024 +14 54 45.361012212           ~ 6 0

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