2016A&A...587A..78H


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.05CET12:23:02

2016A&A...587A..78H - Astronomy and Astrophysics, volume 587A, 78-78 (2016/3-1)

The Lyman alpha reference sample. VII. Spatially resolved Hα kinematics.

HERENZ E.C., GRUYTERS P., ORLITOVA I., HAYES M., OESTLIN G., CANNON J.M., ROTH M.M., BIK A., PARDY S., OTI-FLORANES H., MAS-HESSE J.M., ADAMO A., ATEK H., DUVAL F., GUAITA L., KUNTH D., LAURSEN P., MELINDER J., PUSCHNIG J., RIVERA-THORSEN T.E., SCHAERER D. and VERHAMME A.

Abstract (from CDS):

We present integral field spectroscopic observations with the Potsdam Multi-Aperture Spectrophotometer of all 14 galaxies in the z∼0.1 Lyman Alpha Reference Sample (LARS). We produce 2D line-of-sight velocity maps and velocity dispersion maps from the Balmer α (Hα) emission in our data cubes. These maps trace the spectral and spatial properties of the LARS galaxies' intrinsic Lyα radiation field. We show our kinematic maps that are spatially registered onto the Hubble Space Telescope Hα and Lyman α (Lyα) images. We can conjecture a causal connection between spatially resolved Hα kinematics and Lyα photometry for individual galaxies, however, no general trend can be established for the whole sample. Furthermore, we compute the intrinsic velocity dispersion σ0, the shearing velocity vshear, and the vshear0 ratio from our kinematic maps. In general LARS galaxies are characterised by high intrinsic velocity dispersions (54km/s median) and low shearing velocities (65km/s median). The vshear0 values range from 0.5 to 3.2 with an average of 1.5. It is noteworthy that five galaxies of the sample are dispersion-dominated systems with vshear0<1, and are thus kinematically similar to turbulent star-forming galaxies seen at high redshift. When linking our kinematical statistics to the global LARS Lyα properties, we find that dispersion-dominated systems show higher Lyα equivalent widths and higher Lyα escape fractions than systems with vshear0>1. Our result indicates that turbulence in actively star-forming systems is causally connected to interstellar medium conditions that favour an escape of Lyα radiation.

Abstract Copyright:

Journal keyword(s): galaxies: ISM - galaxies: starburst - cosmology: observations - ultraviolet: galaxies - radiative transfer

VizieR on-line data: <Available at CDS (J/A+A/587/A78): list.dat fits/*>

Simbad objects: 20

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Number of rows : 20

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LEDA 2816291 Sy1 01 50 28.3910010185 +13 08 58.404065463           ~ 44 0
2 BD+75 325 HS* 08 10 49.4901623070 +74 57 57.936226530 8.002 9.23 9.50 9.698 9.884 sdO5 235 0
3 SDSS J082353.65+280622.2 G 08 23 53.659 +28 06 22.26           ~ 1 0
4 2MFGC 6625 EmG 08 23 54.9669334368 +28 06 21.605409814   15.5       ~ 57 0
5 2MASX J08382309+6507160 SBG 08 38 23.093 +65 07 16.05     14.16     ~ 118 1
6 SHOC 240 H2G 09 07 04.888 +53 26 56.60           ~ 25 0
7 LARS 14 EmG 09 26 00.4041863336 +44 27 36.112149583           ~ 59 0
8 LEDA 27453 Sy2 09 38 13.4918143967 +54 28 24.976826000   17.73 17.07     ~ 57 0
9 BD+18 2647 HS* 12 41 51.7901702595 +17 31 19.750592670 10.261 11.70 11.63 11.969 12.159 sdOpec 166 1
10 2MASX J12501385+0734443 G 12 50 13.857 +07 34 44.33           ~ 34 0
11 Mrk 61 EmG 13 01 41.527 +29 22 52.84   16.96 16.65     ~ 37 0
12 LEDA 2469933 G 13 07 28.448 +54 26 52.51           ~ 17 0
13 UGC 8335 PaG 13 15 32.5 +62 07 37           ~ 54 0
14 Ton 151 AGN 13 16 03.915 +29 22 54.05   16.71 16.35     ~ 65 0
15 Mrk 259 SBG 13 28 44.000 +43 55 50.29   16.5       ~ 46 0
16 Mrk 1486 H2G 13 59 50.9093088961 +57 26 22.936953937   17.0       ~ 51 0
17 FIRST J140347.2+062811 rG 14 03 47.224 +06 28 12.18           ~ 18 0
18 LARS 6 G 15 45 44.524 +44 15 51.85           ~ 16 0
19 UGC 10028 G 15 45 46.250 +44 14 52.89   15.7       ~ 14 0
20 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 212 1

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2021.03.05-12:23:02

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