Imperial College London
Alternate

Emeritus ProfessorMichaelRowan-Robinson

Faculty of Natural Sciences, Department of Physics

Distinguished Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7530m.rrobinson Website

 
 
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Location

 

1011Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Clements:2019:pasj/psy099,
author = {Clements, DL and Rowan-Robinson, M and Pearson, C and Afonso, J and Labouteiller, V and Farrah, D and Efstathiou, A and Greenslade, J and Wang, L},
doi = {pasj/psy099},
journal = {Publications of the Astronomical Society of Japan (PASJ)},
title = {AKARI and IRAS: From beam corrections to SEDs},
url = {http://dx.doi.org/10.1093/pasj/psy099},
volume = {71},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - There is significant scientific value to be gained from combining AKARI fluxes with data at other far-infrared (IR) wavelengths from the Infrared Astronomical Satellite (IRAS) and Herschel missions. To be able to do this we must ensure that there are no systematic differences between the data sets that need to be corrected before the fluxes are compatible with each other. One such systematic effect identified in the Bright Source Catalog version 1 (BSCv1) data is the issue of beam corrections. We determine these for the BSC version 2 (BSCv2) data by correlating ratios of appropriate IRAS and AKARI bands with the difference in 2 Micron All Sky Survey (2MASS) J-band extended and point source magnitudes for sources cross-matched between the IRAS Faint Source Catalog (FSC), AKARI BSCv2 and 2MASS catalogs. We find significant correlations (p  10 −13) indicating that beam corrections are necessary in the 65 and 90 μm bands. We then use these corrected fluxes to supplement existing data in spectral energy distribution (SED) fits for ultraluminous infrared galaxies (ULIRGs) in the Herschel ULIRG Survey (HERUS). The addition of AKARI fluxes makes little difference to the results of simple (T, β) fits to the SEDs of these sources, though there is a general decrease in reduced χ2 values. The utility of the extra AKARI data, however, is in allowing physically more realistic SED models with more parameters to be fitted to the data. We also extend our analysis of beam correction issues in the AKARI data by examining the Herschel Reference Sample (HRS) galaxies, which have Herschel photometry from 100 to 500 μm and which are more spatially extended than the HERUS ULIRGs. 34 of the HRS sources have good Herschel SEDs and matching data from AKARI. This investigation finds that our simple 2MASS-based beam correction scheme is inadequate for these larger and more complex sources. There are also indications that additional beam corrections at 140 and
AU  - Clements,DL
AU  - Rowan-Robinson,M
AU  - Pearson,C
AU  - Afonso,J
AU  - Labouteiller,V
AU  - Farrah,D
AU  - Efstathiou,A
AU  - Greenslade,J
AU  - Wang,L
DO  - pasj/psy099
PY  - 2019///
SN  - 2053-051X
TI  - AKARI and IRAS: From beam corrections to SEDs
T2  - Publications of the Astronomical Society of Japan (PASJ)
UR  - http://dx.doi.org/10.1093/pasj/psy099
UR  - http://arxiv.org/abs/1808.03563v1
UR  - http://hdl.handle.net/10044/1/66397
VL  - 71
ER  -
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