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J/A+A/608/A48       HAE229 CO (1-0) ATCA datacube           (Dannerbauer+, 2017)

The implications of the surprising existence of a large massive CO disk in a distant protocluster. Dannerbauer H., Lehnert M.D., Emonts B., Ziegler B., Altieri B., De Breuck C., Hatch N., Kodama T., Koyama Y., Kurk J.D., Matiz T., Miley G., Narayanan D., Norris R.P., Overzier R., Roettgering H.J.A., Sargent M., Seymour N., Tanaka M., Valtchanov I., Wylezalek D. <Astron. Astrophys. 608, A48 (2017)> =2017A&A...608A..48D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, radio ; Photometry, H-alpha ; Carbon monoxide Keywords: galaxies: clusters: individual: MRC1138-262 - galaxies: high-redshift - galaxies: evolution - galaxies: ISM - submillimeter: galaxies - galaxies: individual: HAE229 Abstract: It is not yet known if the properties of molecular gas in distant protocluster galaxies are significantly acted by their environment as galaxies are in local clusters. Through a deep, 64 hours of effective on-source integration with the Australian Telescope Compact Array (ATCA), we discovered a massive, Mmol=2.0±0.2x011M, extended, ∼40kpc, CO(1-0)-emitting disk in the protocluster surrounding the radio galaxy, MRC1138-262. The galaxy, at zCO=2.1478, is a clumpy, massive disk galaxy, M*∼5x1011M, which lies 250kpc in projection from MRC1138-262 and is a known Hα emitter, named HAE229. This source has a molecular gas fraction of ∼30%. The CO emission has a kinematic gradient along its major axis, centered on the highest surface brightness rest-frame optical emission, consistent with HAE229 being a rotating disk. Surprisingly, a significant fraction of the CO emission lies outside of the UV/optical emission. In spite of this, HAE229 follows the same relation between star-formation rate and molecular gas mass as normal field galaxies. HAE229 is the first CO(1-0) detection of an ordinary, star-forming galaxy in a protocluster.We compare a sample of cluster members at z>0.4 that are detected in low-order CO transitions, with a similar sample of sources drawn from the field.We confirm findings that the CO-luminosity and full-width at half maximum (FWHM) are correlated in starbursts and show that this relation is valid for normal high-z galaxies as well as for those in overdensities. We do not find a clear dichotomy in the integrated Schmidt-Kennicutt relation for protocluster and field galaxies. Our results suggest that environment does not have an impact on the "star-formation electronic efficiency" or the molecular gas content of high-redshift galaxies. Not finding any environmental dependence in these characteristics, especially for such an extended CO disk, suggests that environmentally-specific processes such as ram pressure stripping do not operate electronic efficiently in (proto)clusters. Description: Our CO(1-0) observations of HAE229 were performed with the Australia Telescope Compact Array during April 2011 - February 2015 in the H75, H168, H214, 750A, 750D, and 1.5A array configurations and only including baselines ranging from 31-800m in our reduction. We provide the reduced ATCA data cube of HAE229. The units are in Jy/beam. Objects: -------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------- 11 40 46.1 -26 29 12 HAE229 = [KPR2004] HA 229 -------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 132 1 Informations on datacube HAE229_cube.fits 2880 1173 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- 21 I2 --- Nx Number of pixels along X-axis 23- 24 I2 --- Ny Number of pixels along Y-axis 26- 28 I3 --- Nz Number of slices 30- 50 A21 --- Obs.date Observation date (YYYY-MM-DDThh:mm:ss.s) 52- 63 E12.6 m/s bHV Lower value of heliocentric velocity interval 65- 75 E11.6 m/s BHV Upper value of heliocentric velocity interval 77- 81 I5 m/s dHV Heliocentric velocity resolution 83- 86 I4 Kibyte size Size of FITS file 88-103 A16 --- FileName Name of FITS file 105-132 A28 --- Title Title of the FITS file
Acknowledgements: Helmut Dannerbauer, helmut(at)iac.es
(End) Patricia Vannier [CDS] 11-Oct-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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