2022A&A...657L..15H


Query : 2022A&A...657L..15H

2022A&A...657L..15H - Astronomy and Astrophysics, volume 657, L15-15 (2022/1-1)

Molecular gas properties of Q1700-MD94: A massive main-sequence galaxy at z ≃ 2.

HENRIQUEZ-BROCAL K., HERRERA-CAMUS R., TACCONI L., GENZEL R., BOLATTO A., BOVINO S., DEMARCO R., FORSTER SCHREIBER N., LEE M., LUTZ D. and RUBIO M.

Abstract (from CDS):

We use a combination of new NOrthern Extended Millimeter Array (NOEMA) observations of the pair of [CI] transitions, the CO(7-6) line, and the dust continuum, in addition to ancillary CO(1-0) and CO(3-2) data, to study the molecular gas properties of Q1700-MD94. This is a massive, main-sequence galaxy at z ≃ 2. We find that for a reasonable set of assumptions for a typical massive star-forming galaxy, the CO(1-0), the [CI](1-0) and the dust continuum yield molecular gas masses that are consistent within a factor of ∼2. The global excitation properties of the molecular gas as traced by the [CI] and CO transitions are similar to those observed in other massive star-forming galaxies at z ∼ 2. Our large velocity gradient modeling using RADEX of the CO and [CI] spectral line energy distributions suggests the presence of relatively warm (Tkin = 41 K), dense (nH2 = 8 x 103 cm–3) molecular gas, comparable to the high-excitation molecular gas component observed in main-sequence star-forming galaxies at z ∼ 1. The galaxy size in the CO(1-0) and CO(7-6) line emission is comparable, which suggests that the highly excited molecular gas is distributed throughout the disk, powered by intense star formation activity. A confirmation of this scenario will require spatially resolved observations of the CO and [CI] lines, which can now be obtained with NOEMA upgraded capabilities.

Abstract Copyright: © ESO 2022

Journal keyword(s): galaxies: high-redshift - galaxies: ISM - galaxies: evolution

VizieR on-line data: <Available at CDS (J/A+A/657/L15): list.dat fits/*>

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3193 2
2 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6555 1
3 ACS-GC 90045460 AGN 03 32 31.462 -27 46 23.07 25.05 23.96 23.64 23.28 23.001 ~ 103 0
4 M 42 OpC 05 35 17 -05 23.4           ~ 3970 0
5 LBN 180.05-01.66 HII 05 41.1 +28 05           ~ 10 0
6 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5677 6
7 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1930 3
8 QSO J1415+1129 QSO 14 15 46.25 +11 29 43.4   17.63 17.23     ~ 627 0
9 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3446 1
10 [ESS2003] Q1700-MD94 G 17 00 42.020 +64 11 24.22           ~ 13 0
11 [ESS2003] Q2343-BX610 G 23 46 09.43 +12 49 19.2           ~ 45 0

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2023.01.31-02:17:21

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