J/A+A/657/L15 Q1700-MD94 CI(1-0) datacube with NOEMA (Henriquez-Brocal+, 2022)
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., Foerster Schreiber N., Lee M., Lutz D., Rubio M.
<Astron. Astrophys. 657, L15 (2022)>
=2022A&A...657L..15H 2022A&A...657L..15H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies ; Carbon monoxide
Keywords: galaxies: high-redshift - galaxies: ISM - galaxies: evolution
Abstract:
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, 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 (LVG) modeling using RADEX of the CO
and [CI] spectral line energy distributions (SLEDs) suggests the
presence of relatively warm (Tkin=41K), dense (nH2=8x103cm-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 are comparable,
which suggests that the highly-excited molecular gas is distributed
throughout the disk powered by intense star formation activity. To
confirm this scenario will require spatially resolved observations of
the CO and [CI] lines which can now be obtained with NOEMA upgraded
capabilities.
Description:
We observed MD94 with NOEMA located in the French Alps. On August 31,
2017, we used the 2 mm band for a total of 7.5 hours to target the
[CI](1-0) line located at an observed frequency of nuobs=147.8GHz.
Then, starting on September 1, 2017, we used the 1mm band for a total
of 14.3 hours to observe the [CI](2-1) and CO(7-6) lines centered at
an observed frequency of nuobs=243.0GHz. All observations were
carried out in NOEMA D array configuration, which is the most com-
pact one.
Objects:
-------------------------------------------------------------
RA (2000) DE Designation(s)
-------------------------------------------------------------
17 00 42.02 +64 11 24.2 Q1700-MD94 = [ESS2003] Q1700-MD94
-------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
list.dat 91 1 Informations of FITS datacube
fits/* . 1 FITS datacube
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 22 I3 --- Nx Number of pixels along X-axis
24- 26 I3 --- Ny Number of pixels along Y-axis
28- 29 I2 --- Nz Number of pixels along Z-axis
31- 36 I6 km/s bVRAD Lower value of VRAD interval
38- 41 I4 km/s BVRAD Upper value of VRAD interval
43- 45 I3 km/s dVRAD VRAD resolution
47- 50 I4 Kibyte size Size of FITS file
52- 63 A12 --- FileName Name of FITS file, in subdirectory fits
65- 91 A27 --- Title Title of the FITS file
--------------------------------------------------------------------------------
Acknowledgements:
Katherine Henriquez-Brocal, kathehenriquez(at)udec.cl
(End) Patricia Vannier [CDS] 29-Nov-2021