2018A&A...615A.142A


Query : 2018A&A...615A.142A

2018A&A...615A.142A - Astronomy and Astrophysics, volume 615A, 142-142 (2018/7-1)

Extreme conditions in the molecular gas of lensed star-forming galaxies at z ∼3.

ANDREANI P., RETANA-MONTENEGRO E., ZHANG Z.-Y., PAPADOPOULOS P., YANG C. and VEGETTI S.

Abstract (from CDS):


Context. Atomic carbon can be an efficient tracer of the molecular gas mass, and when combined to the detection of high-J and low-J CO lines it yields also a sensitive probe of the power sources in the molecular gas of high-redshift galaxies.
Aims. The recently installed SEPIA 5 receiver at the focus of the APEX telescope has opened up a new window at frequencies 159-211GHz allowing the exploration of the atomic carbon in high-z galaxies, at previously inaccessible frequencies from the ground. We have targeted three gravitationally lensed galaxies at redshift of about 3 and conducted a comparative study of the observed high-J CO/CI ratios with well-studied nearby galaxies.
Methods. Atomic carbon (CI(2-1)) was detected in one of the three targets and marginally in a second, while in all three targets the J=7-6 CO line is detected.
Results. The CO(7-6)/CI(2-1), CO(7-6)/CO(1-0) line ratios and the CO(7-6)/(far-IR continuum) luminosity ratio are compared to those of nearby objects. A large excitation status in theISM of these high-z objects is seen, unless differential lensing unevenly boosts the CO line fluxes from the warm and dense gas more than the CO(1-0), CI(2-1), tracing a more widely distributed cold gas phase. We provide estimates of total molecular gas masses derived from the atomic carbon and the carbon monoxide CO(1-0), which within the uncertainties turn out to be equal.

Abstract Copyright: © ESO 2018

Journal keyword(s): galaxies: starburst - galaxies: ISM - ISM: molecules - ISM: abundances - submillimeter: galaxies - techniques: spectroscopic

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3148 2
2 NGC 891 H2G 02 22 32.907 +42 20 53.95 11.08 10.81 9.93 7.86   ~ 1595 2
3 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1259 3
4 H-ATLAS J090740.0-004200 G? 09 07 40.0 -00 42 00           ~ 28 0
5 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2246 0
6 V* RW LMi C* 10 16 02.2777043904 +30 34 19.045098516       15.27   C4,3e 386 0
7 NAME G12v2.43 G 11 35 26.3 -01 46 05           ~ 15 0
8 NAME G12.v2.30 G 11 46 37.9 -00 11 32           ~ 29 0
9 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6286 0
10 M 90 Sy2 12 36 49.8009839880 +13 09 46.523813040 10.56 10.26 9.54     ~ 850 1
11 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4262 3
12 NAME NB.v1.78 G 13 30 08.3 +24 59 00           ~ 16 0
13 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2835 4
14 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1564 2
15 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13080 0
16 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1553 0
17 NGC 4560A G ~ ~           ~ 1 0

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2022.08.08-02:34:16

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