2016A&A...586L...7B


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.21CEST16:34:24

2016A&A...586L...7B - Astronomy and Astrophysics, volume 586, L7-7 (2016/2-1)

An ALMA view of the interstellar medium of the z = 4.77 lensed starburst SPT-S J213242-5802.9.

BETHERMIN M., DE BREUCK C., GULLBERG B., ARAVENA M., BOTHWELL M.S., CHAPMAN S.C., GONZALEZ A.H., GREVE T.R., LITKE K., MA J., MALKAN M., MARRONE D.P., MURPHY E.J., SPILKER J.S., STARK A.A., STRANDET M., VIEIRA J.D., WEISS A. and WELIKALA N.

Abstract (from CDS):

We present ALMA detections of the [NII] 205µm and CO(12-11) emission lines, and the tentative detection of [CI] 3P1-3P0 for the strongly lensed (µ=5.7±0.5) dusty, star-forming galaxy SPT-S J213242-5802.9 (hereafter SPT2132-58) at z=4.77. The [NII] and CO(12-11) lines are detected at 11.5 and 8.5σ levels, respectively, by our band 6 observations. The [CI] line is detected at 3.2σ after a reanalysis of existing band 3 data. The [CI] luminosity implies a gas mass of (3.8±1.2)x1010M, and, consequently, a very short depletion timescale of 34±13Myr and a CO luminosity to gas mass conversion factor αCO of 1.0±0.3M/(K.km/spc2). SPT2132-58 is an extreme starburst with an intrinsic star formation rate of 1100±200M/yr. We find a [CII]/[NII] ratio of 26±6, which is the highest ratio reported at z>4. This suggests that SPT2132-58 hosts an evolved interstellar medium (0.5Z<Z<1.5Z), which may be dominated by photodissociation regions. The CO(2-1) and CO(5-4) transitions have lower CO to far-infrared ratios than local and high-redshift samples, while CO(12-11) is similar to these samples, suggesting the presence of an additional very excited component or an active galactic nucleus.

Abstract Copyright:

Journal keyword(s): galaxies: starburst - galaxies: ISM - galaxies: high-redshift - galaxies: star formation - submillimeter: galaxies

Simbad objects: 6

goto Full paper

goto View the reference in ADS

Number of rows : 6

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 ALESS J033229.29-275619.7 QSO 03 32 29.2912 -27 56 19.465     26.76 25.82 25.1655 ~ 103 0
2 QSO J0831+5245 QSO 08 31 41.7095363198 +52 45 17.620340544   19.2   14.5 13.9 ~ 501 1
3 [CRR2012] HLS J091828.6+514223 G 09 18 28.60 +51 42 23.3           ~ 33 0
4 QSO B1202-074 QSO 12 05 23.12 -07 42 32.4     17.5     ~ 354 5
5 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1827 3
6 SPT-S J213242-5802.9 G 21 32 43.540 -58 02 54.00           ~ 17 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2016A&A...586L...7B and select 'bookmark this link' or equivalent in the popup menu


2021.04.21-16:34:24

© Université de Strasbourg/CNRS

    • Contact