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Heliocentric distance dependence of zodiacal light observed by Hayabusa2#
Tatsumi, Eri; Sugita, Seiji; Matsuura, Shuji +21 more
Zodiacal light (ZL) is sunlight scattered by interplanetary dust particles (IDPs) at optical wavelengths. The spatial distribution of IDPs in the Solar System may hold an important key to understanding the evolution of the Solar System and material transportation within it. The number density of IDPs can be expressed as
Far-ultraviolet and far-infrared bivariate luminosity function of galaxies: Complex relation between stellar and dust emission
Buat, Véronique; Burgarella, Denis; Takeuchi, Tsutomu T. +2 more
Far-ultraviolet (FUV) and far-infrared (FIR) luminosity functions (LFs) of galaxies show a strong evolution from z = 0 to z = 1, but the FIR LF evolves much stronger than the FUV one. The FUV is dominantly radiated from newly-formed short-lived OB stars, while the FIR is emitted by dust grains heated by the FUV radiation field. It is known that du…
Dusty Universe viewed by AKARI far infrared detector
Buat, V.; Małek, K.; Burgarella, D. +5 more
We present the results of the analysis of multiwavelength Spectral Energy Distributions (SEDs) of far-infrared galaxies detected in the AKARI Deep Field-South (ADF-S) Survey. The analysis uses a carefully selected sample of 186 sources detected at the 90 µm AKARI band, identified as galaxies with cross-identification in public catalogues. Fo…
Clustering of far-infrared galaxies in the AKARI All-Sky Survey North
Oyabu, S.; Takeuchi, T. T.; Pollo, A. +4 more
We present the measurements of the angular two-point correlation function for AKARI 90-µm point sources, detected outside the Milky Way plane and other regions characterized by high Galactic extinction in the northern Galactic hemisphere, and categorized as extragalactic sources according to our far-infrared-color based criterion. Together w…
Clustering of far-infrared galaxies in the AKARI All-Sky Survey
Oyabu, S.; Takeuchi, T. T.; Pollo, A. +1 more
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 (Pollo et al., 2010). This is the first…
Star formation and dust extinction properties of local galaxies as seen from AKARI and GALEX
Buat, V.; Burgarella, D.; Takeuchi, T. T. +2 more
An accurate estimation of the star formation-related properties of galaxies is crucial for understanding the evolution of galaxies. In galaxies, ultraviolet (UV) light emitted by recently formed massive stars is attenuated by dust, which is also produced by star formation (SF) activity, and is re-emitted at mid- and far- infrared (IR) wavelengths.…
Infrared composition of the Large Magellanic Cloud
Takeuchi, T. T.; Onaka, T.; Ita, Y. +3 more
The evolution of galaxies and the history of star formation in the Universe are among the most important topics in today's astrophysics. Especially, the role of small, irregular galaxies in the star-formation history of the Universe is not yet clear. Using the data from the AKARI IRC survey of the Large Magellanic Cloud at 3.2, 7, 11, 15, and 24 &…
AKARI All Sky Survey: contribution from AGB stars to the far infrared flux from the Milky Way related to point sources outside the Galactic plane
Pollo, Agnieszka; Takeuchi, Tsutomu Tsutomu; Rybka, Piotr
Using data from the FIS AKARI All-Sky Survey, we make a first step towards the estimation of the contribution from Asymptotic Giant Branch (AGB) stars to the far-infrared (FIR) flux from the Milky Way. We estimate the contribution from the AGB, and post-AGB, stars to the total flux generated by point sources outside the Galactic plane. Additionall…