J/A+A/639/L13 4C 41.17 IRAM/NOEMA data cubes (Nesvadba+, 2020))
Gas, dust and star formation in the positive AGN feedback candidate 4C 41.17
at z=3.9.
Nesvadba N.P.H., Bicknell G.V., Mukherjee D., Wagner A.Y.
<Astron. Astrophys. 639, L13 (2020)>
=2020A&A...639L..13N 2020A&A...639L..13N (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Interferometry ; Radio lines
Keywords: galaxies: active - galaxies: high-redshift -
galaxies: individual: 4C 41.17 - galaxies: jets -
galaxies: star formation
Abstract:
We present new, spatially resolved [CI]1-0, [CI]2-1, CO(7-6),
and dust continuum observations of 4C 41.17 at z=3.8. This is one of
the best-studied radio galaxies in this epoch and is arguably the best
candidate of jet-triggered star formation at high redshift currently
known in the literature. 4C 41.17 shows a narrow ridge of dust
continuum extending over 15kpc near the radio jet axis. Line emission
is found within the galaxy in the region with signatures of positive
feedback. Using the [CI]1-0 line as a molecular gas tracer, and
multifrequency observations of the far-infrared dust heated by star
formation, we find a total gas mass of 7.6x1010M☉, which is
somewhat greater than that previously found from CO(4-3). The gas
mass surface density of 103M☉/yr/pc2 and the star formation
rate surface density of 10M☉/yr/kpc2 were derived over the 12
kpc8 kpc area, where signatures of positive feedback have previously
been found. These densities are comparable to those in other
populations of massive, dusty star-forming galaxies in this redshift
range, suggesting that the jet does not currently enhance the
efficiency with which stars form from the gas. This is consistent with
expectations from simulations, whereby radio jets may facilitate the
onset of star formation in galaxies without boosting its efficiency
over longer timescales, in particular after the jet has broken out of
the interstellar medium, as is the case in 4C 41.17.
The release includes Gaussian line fits to the [CI]1-0, [CI]2-1, and
CO(7-6) emission lines in the radio galaxy 4C 41.17 at z=3.8, as well
as the interferometric data cubes.
Description:
Interferometric data cubes obtained with IRAM/NOEMA of the radio
galaxy 4C41.17 at z=3.79 of the emission lines of [CI]1-0 and [CI]2-1
and CO(7-6).
Objects:
---------------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------------
06 50 52.10 +41 30 30.5 4C 41.17 = LEDA 2820698
---------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 42 3 Emission-line properties and giving access to
the data cubes
list.dat 161 2 *List of fits datacubes files
fits/* . 2 Individual fits datacubes
--------------------------------------------------------------------------------
Note on list.dat: Gaussian fits to emission-line properties as given in
Table 1 of the paper.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right ascension (J2000)
10- 17 F8.4 deg DEdeg Declination (J2000)
19- 21 I3 --- Nx Number of pixels along the 1st axis of the
data cube
23- 25 I3 --- Ny Number of pixels along the 2nd axis of the
data cube
27- 29 I3 --- Nz Number of pixels along the 3rd axis of the
data cube
31- 36 I6 MHz RestFreq Rest-frame frequency
(zero-point of the velocity axis)
38- 48 F11.1 m/s bVel Minimal Velocity covered by the spectrum
50- 59 F10.1 m/s BVel Maximal Velocity covered by the spectrum
61- 67 F7.1 m/s dVel Absolute value of the velocity channel width
69- 77 I9 byte Size Size of the fits file
79-116 A38 --- FileName Name of the fits file in subdirectory fits
118-161 A44 --- Title Title of the fits file
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- LineID ID of the emission line
9- 11 I3 km/s Vel Velocity of the emission line core
relative to z=3.792
13- 14 I2 km/s e_Vel Error of the Velocity of the emission line
core relative to z=3.792
16- 18 I3 km/s FWHM FWHM of the emission line
20- 21 I2 km/s e_FWHM Error on the FWHM
23- 26 F4.2 Jy.km/s Iline Line-integrated emission-line flux
28- 31 F4.2 Jy.km/s e_Iline Error on the line-integrated emission-line flux
33- 36 F4.2 mJy Scont Continuum flux
38- 42 F5.3 mJy e_Scont Error on the continuum flux
--------------------------------------------------------------------------------
Acknowledgements:
Nicole Nesvadba, nicole.nesvadba(at)oca.eu
(End) Patricia Vannier [CDS] 16-Jul-2020