TY - JOUR
T1 - Clustering of far-infrared galaxies in the AKARI all-sky survey
AU - Pollo, A.
AU - Takeuchi, T. T.
AU - Suzuki, T. L.
AU - Oyabu, S.
N1 - Funding Information:
Acknowledgments. We would like to express our deep gratitude to the referees: Prof. Hideo Matsuhara and another anonymous referee, for their thorough, constructive and helpful comments. This work is based on observations with AKARI, a JAXA project with the participation of ESA. AP has been supported by the research grant of the Polish National Science Centre N N203 51 29 38. This research was partially supported by the project POLISH-SWISS ASTRO PROJECT co-financed by a grant from Switzerland through the Swiss Contribution to the enlarged European Union. TTT has been supported by the Grant-in-Aid for the Scientific Research Fund (20740105, 23340046) commissioned by the MEXT. TTT, TLS, and SO have also been partially supported from the Grand-in-Aid for the Global COE Program “Quest for Fundamental Principles in the Universe: from Particles to the Solar System and the Cosmos” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan.
PY - 2013
Y1 - 2013
N2 - We present the first measurement of the angular two-point correlation function for AKARI 90-μm point sources, detected outside of the Milky Way plane and other regions characterized by high Galactic extinction, and categorized as extragalactic sources according to our far-infrared-color based criterion (Polio et al, 2010). This is the first measurement of the large-scale angular clustering of galaxies selected in the far-infrared after IRAS measurements. Although a full description of the clustering properties of these galaxies will be obtained by more detailed studies, using either a spatial correlation function, or better information about properties and, at least, photometric redshifts of these galaxies, the angular correlation function remains the first diagnostic tool to establish the clustering properties of the catalog and the observed galaxy population. We find a non-zero clustering signal in both hemispheres extending up to ∼40 degrees, without any significant fluctuations at larger scales. The observed correlation function is well fitted by a power-law function. The notable differences between the northern and southern hemispheres are found, which can probably be attributed to the photometry problems, and might point to the necessity of performing a better calibration in the data from the southern hemisphere.
AB - We present the first measurement of the angular two-point correlation function for AKARI 90-μm point sources, detected outside of the Milky Way plane and other regions characterized by high Galactic extinction, and categorized as extragalactic sources according to our far-infrared-color based criterion (Polio et al, 2010). This is the first measurement of the large-scale angular clustering of galaxies selected in the far-infrared after IRAS measurements. Although a full description of the clustering properties of these galaxies will be obtained by more detailed studies, using either a spatial correlation function, or better information about properties and, at least, photometric redshifts of these galaxies, the angular correlation function remains the first diagnostic tool to establish the clustering properties of the catalog and the observed galaxy population. We find a non-zero clustering signal in both hemispheres extending up to ∼40 degrees, without any significant fluctuations at larger scales. The observed correlation function is well fitted by a power-law function. The notable differences between the northern and southern hemispheres are found, which can probably be attributed to the photometry problems, and might point to the necessity of performing a better calibration in the data from the southern hemisphere.
KW - Cosmology
KW - Dust
KW - Galaxies: Clustering
KW - Infrared
KW - Large scale structure
UR - http://www.scopus.com/inward/record.url?scp=84876263439&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876263439&partnerID=8YFLogxK
U2 - 10.5047/eps.2012.08.009
DO - 10.5047/eps.2012.08.009
M3 - Article
AN - SCOPUS:84876263439
VL - 65
SP - 273
EP - 279
JO - Earth, Planets and Space
JF - Earth, Planets and Space
SN - 1343-8832
IS - 3
ER -