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Galaxy And Mass Assembly (GAMA): Panchromatic Data Release (far-UV --- far-IR) and the low-z energy budget

Driver, SP and Wright, AH and Andrews, SK and Davies, LJ and Kafle, PR and Lange, R and Moffett, AJ and Mannering, E and Robotham, ASG and Vinsen, K and Alpaslan, M and Andrae, E and Baldry, IK and Bauer, AE and Bamford, SP and Bland-Hawthorn, J and Bourne, N and Brough, S and Brown, MJI and Cluver, ME and Croom, S and Colless, M and Conselice, CJ and Cunha, ED and Propris, RD and Drinkwater, M and Dunne, L and Eales, S and Edge, A and Frenk, C and Graham, AW and Grootes, M and Holwerda, BW and Hopkins, AM and Ibar, E and Kampen, EV and Kelvin, LS and Jarrett, T and Jones, DH and Lara-Lopez, MA and Lopez-Sanchez, AR and Liske, J and Loveday, J and Maddox, SJ and Madore, B and Meyer, M and Norberg, P and Penny, SJ and Phillipps, S and Popescu, C and Tuffs, RJ and Peacock, JA and Pimbblet, KA and Rowlands, K and Sansom, AE and Seibert, M and Smith, MWL and Sutherland, WJ and Taylor, EN and Valiante, E and Wang, L and Wilkins, SM and Williams, R (2016) Galaxy And Mass Assembly (GAMA): Panchromatic Data Release (far-UV --- far-IR) and the low-z energy budget. Monthly Notices of the Royal Astronomical Society, 455 (4). pp. 3911-3942. ISSN 0035-8711

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Abstract

We present the GAMA Panchromatic Data Release (PDR) constituting over 230deg$^2$ of imaging with photometry in 21 bands extending from the far-UV to the far-IR. These data complement our spectroscopic campaign of over 300k galaxies, and are compiled from observations with a variety of facilities including: GALEX, SDSS, VISTA, WISE, and Herschel, with the GAMA regions currently being surveyed by VST and scheduled for observations by ASKAP. These data are processed to a common astrometric solution, from which photometry is derived for 221,373 galaxies with r<19.8 mag. Online tools are provided to access and download data cutouts, or the full mosaics of the GAMA regions in each band. We focus, in particular, on the reduction and analysis of the VISTA VIKING data, and compare to earlier datasets (i.e., 2MASS and UKIDSS) before combining the data and examining its integrity. Having derived the 21-band photometric catalogue we proceed to fit the data using the energy balance code MAGPHYS. These measurements are then used to obtain the first fully empirical measurement of the 0.1-500$\mu$m energy output of the Universe. Exploring the Cosmic Spectral Energy Distribution (CSED) across three time-intervals (0.3-1.1Gyr, 1.1-1.8~Gyr and 1.8---2.4~Gyr), we find that the Universe is currently generating $(1.5 \pm 0.3) \times 10^{35}$ h$_{70}$ W Mpc$^{-3}$, down from $(2.5 \pm 0.2) \times 10^{35}$ h$_{70}$ W Mpc$^{-3}$ 2.3~Gyr ago. More importantly, we identify significant and smooth evolution in the integrated photon escape fraction at all wavelengths, with the UV escape fraction increasing from 27(18)% at z=0.18 in NUV(FUV) to 34(23)% at z=0.06. The GAMA PDR will allow for detailed studies of the energy production and outputs of individual systems, sub-populations, and representative galaxy samples at $z<0.5$. The GAMA PDR can be found at: http://gama-psi.icrar.org/

Item Type: Article
Additional Information: This is a pre-copyedited, author-produced PDF of an article accepted for publication in Mothly Notices of the Royal Astronomical Society following peer review. The version of record "Galaxy And Mass Assembly (GAMA): Panchromatic Data Release (far-UV --- far-IR) and the low-z energy budget" is available online at: http://dx.doi.org/10.1093/mnras/stv2505
Uncontrolled Keywords: astro-ph.GA; astro-ph.GA; astro-ph.CO
Subjects: Q Science > QB Astronomy
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press
Related URLs:
Date Deposited: 09 Dec 2015 11:40
Last Modified: 23 Mar 2016 11:28
URI: http://researchonline.ljmu.ac.uk/id/eprint/2446

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