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The Spitzer-Cosmic Assembly Deep Near-Infrared Extragalactic Legacy Survey (S-CANDELS; PI G. Fazio) is a Cycle 8 Exploration Program designed to detect galaxies at very high redshifts (z > 5). To mitigate the effects of cosmic variance and…

The Extragalactic Background Light (EBL) as an integrated light from outside of our Galaxy includes information of the early universe and the Dark Ages. We analyzed the spectral data of the astrophysical diffuse emission obtained with the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Kohji Tsumura , Toshio Matsumoto , Shuji Matsuura , Itsuki Sakon , Takehiko Wada

We present the image maps, data reduction, analysis and the first source counts from the Herschel SPIRE Dark Field. The SPIRE Dark Field is an area of sky near the North Ecliptic Pole observed many times during the calibration phase of the…

Cosmology and Nongalactic Astrophysics · Physics 2025-05-26 Chris Pearson , Thomas W. O. Varnish , Xinni Wu , David L. Clements , Ayushi Parmar , Helen Davidge , Matthew Pearson

The e$^+$ e$^-$ annihilation line at 511 keV provides a unique probe for studying the distribution and origin of positrons in our Galaxy. The SPI spectrometer on INTEGRAL has observed this gamma-ray line for two decades. We analyze 20 years…

High Energy Astrophysical Phenomena · Physics 2025-10-29 Hiroki Yoneda , Thomas Siegert , Saurabh Mittal

To separate stars and galaxies in the far infrared AKARI All-Sky Survey data, we have selected a sample with the complete color information available in the low extinction regions of the sky and constructed color-color plots for these data.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Agnieszka Pollo , Piotr Rybka , Tsutomu T. Takeuchi

We demonstrate the use of the AKARI survey photometric data in the study of galactic star formation. Our aim was to select young stellar objects (YSOs) in the AKARI FIS catalogue. We used AKARI Far-Infrared Surveyor and Wide-field Infrared…

Revealing what fraction of galaxies harbor AGN is central in understanding black hole accretion history of the Universe. However, optical and soft X-ray surveys miss the most highly obscured AGNs. Infrared (IR), instead, is more robust…

Astrophysics of Galaxies · Physics 2019-03-20 Chia-Ying Chiang , Tomotsugu Goto , Tetsuya Hashimoto , Seong-Jin Kim , Hideo Matsuhara , Nagisa Oi

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…

Astrophysics of Galaxies · Physics 2013-11-01 K. Malek , A. Pollo , T. T. Takeuchi , E. Giovannoli , V. Buat , D. Burgarella , M. Malkan , A. Kurek

Accompanying Part I, this sequel delineates a validation of the recently proposed AI for Regularisation in radio-interferometric Imaging (AIRI) algorithm on observations from the Australian Square Kilometre Array Pathfinder (ASKAP). The…

Instrumentation and Methods for Astrophysics · Physics 2023-09-11 Amanda G. Wilber , Arwa Dabbech , Matthieu Terris , Adrian Jackson , Yves Wiaux

We demonstrate the capability of AKARI for mapping diffuse far-infrared emission and achieved reliability of all-sky diffuse map. We have conducted an all-sky survey for more than 94 % of the whole sky during cold phase of AKARI observation…

The infrared deep sample (IDS), in the north ecliptical polar region (NEPR), is the first complete, far--IR selected sample, on which numerous studies of galaxy evolution are based. Here we present and analyze the spectral classification of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 D. Bettoni , P. Mazzei , A. della Valle

By tracing the distribution of cool dust in the extended envelopes of post-AGB stars and (proto)-planetary nebulae ((P)PNe) we aim to recover, or constrain, the mass loss history experienced by these stars in their recent past. The…

Solar and Stellar Astrophysics · Physics 2015-05-27 N. L. J. Cox , D. A. Garcia-Hernandez , P. Garcia-Lario , A. Manchado

The presence of Galactic cirri in deep optical observations is one of the most challenging problems that the extragalactic community is already facing, and it is expected to be even tougher in the near future with the increasing depth of…

Astrophysics of Galaxies · Physics 2020-12-04 Javier Román , Ignacio Trujillo , Mireia Montes

The Herschel-SPIRE Dark Field is the deepest field produced by the SPIRE instrument pushing down below the galaxy confusion limit in each of the 250, 350, 500 $\mu$m bands. Standard source extraction techniques inevitably fail because of…

Cosmology and Nongalactic Astrophysics · Physics 2025-04-14 Thomas W O Varnish , Xinni Wu , Chris Pearson , David L Clements , Ayushi Parmar

We present the 15 micron extragalactic source counts from the Final Analysis Catalogue of the European Large Area ISO Survey southern hemisphere field S1, extracted using the Lari method. The large number of extragalactic sources (about…

We reanalyze data of near-infrared background taken by Infrared Telescope in Space (IRTS) based on up-to-date observational results of zodiacal light, integrated star light and diffuse Galactic light. We confirm the existence of residual…

Astrophysics of Galaxies · Physics 2015-05-21 T. Matsumoto , M. G. Kim , J. Pyo , K. Tsumura

We present the Spitzer Data Fusion, a database incorporating far-ultraviolet to far-infrared flux measurements as well as photometric and spectroscopic redshifts for 4.4 million IRAC-selected sources detected over 8 extragalactic fields…

Astrophysics of Galaxies · Physics 2016-06-22 Mattia Vaccari

We have developed and characterized an imaging instrument to measure the spatial properties of the diffuse near-infrared extragalactic background light in a search for fluctuations from z > 6 galaxies during the epoch of reionization. The…

One way to constrain the evolutionary histories of galaxies is to analyse their stellar populations. In the local Universe, our understanding of the stellar population properties of galaxies has traditionally relied on the study of optical…

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