Search Publications
The Nature of Hard X-Ray (3-24 keV) Detected Luminous Infrared Galaxies in the COSMOS Field
Ueda, Yoshihiro; Matsuoka, Kenta
We investigate the nature of far-infrared (70 µm) and hard X-ray (3-24 keV) selected galaxies in the COSMOS field detected with both Spitzer and the Nuclear Spectroscopic Telescope Array (NuSTAR). By matching the Spitzer-COSMOS catalog with the NuSTAR-COSMOS catalog, we obtain a sample consisting of a hyperluminous infrared galaxy with {log}…
ALMA Maps of Dust and Warm Dense Gas Emission in the Starburst Galaxy IC 5179
van der Werf, Paul; Gao, Yu; Zhang, Zhi-Yu +6 more
We present our high-resolution (0.″15 × 0.″13, ∼34 pc) observations of the CO (6-5) line emission, which probes the warm and dense molecular gas, and the 434 µm dust continuum emission in the nuclear region of the starburst galaxy IC 5179, conducted with the Atacama Large Millimeter Array (ALMA). The CO (6-5) emission is spatially distribute…
Spectral and photometric behavior of SU UMa during quiescence and outburst states
Sanad, M. R.; Saad, S. M.; Zead, I. +2 more
We report the results of spectral and photometric observations of SU UMa. Available spectra from International Ultraviolet Explorer (IUE) and CCD photometry of five nights were used. Some profiles revealing the variations of some spectral lines at different times are presented. There is variation with time for photometric observations and the brig…
Sizes of the stellar subsystems of galaxies and intracluster stars in the Virgo cluster.
Tikhonov, N. A.
Stellar photometry for three fields in the Virgo cluster of galaxies has been performed on the basis of archival Hubble Space Telescope ACS/WFC images. The densely populated red giant branches belonging to cluster galaxies are seen on the constructed Hertzsprung-Russell diagrams. The distances to eight galaxies in the Virgo cluster have been deter…
A preliminary comparison of photometric (MWSC) and trigonometric (TGAS) distances of open cluster stars
Scholz, Ralf-Dieter; Kovaleva, Dana; Piskunov, Anatoly +1 more
The goal of this researchwas to compare the open cluster photometric distance scale of the global survey of star clusters in the MilkyWay (MWSC) with the distances derived fromtrigonometric parallaxes fromthe Gaia DR1/TGAS catalogue and to investigate towhich degree and extent both scales agree.We compared the parallax-based and photometrybased di…
The AGN Population in the Akari NEP Deep Field
Pearson, Chris; Serjeant, Stephen; Matsuhara, Hideo +6 more
The AKARI North Ecliptic Pole Deep Field is a natural location to accomplish deep extragalactic surveys. It is supported by comprehensive ancillary data extending from radio to X-ray wavelengths, which have been used to classify radio sources as radio-loud and radio-quiet objects and to create a catalogue of Active Galactic Nuclei (AGN). This has …
Potential infrared relaxation channels calculated for CO2 clathrate hydrates
Lakhlifi, Azzedine; Dahoo, Pierre Richard; Chassefière, Eric
The infrared bar-spectrum of a single carbon dioxide molecule encapsulated in nano-cage clathrate hydrate is determined using the LD (Lakhlifi-Dahoo) extended site inclusion model successfully applied to analyze the spectra of CO2 isotopologues isolated in rare gas matrices. Trapping is energetically more favorable in clathrate structur…
Formation of multiple energy dispersion of H+, He+, and O+ ions in the inner magnetosphere in response to interplanetary shock
Tanaka, T.; Ebihara, Y.; Tsuji, H.
An interplanetary (IP) shock has a large impact on magnetospheric ions. Satellite observations have shown that soon after arrival of the IP shock, overall intensity of the ions rapidly increases and multiple energy dispersion appears in an energy-time spectrogram of the ions. In order to understand the response of the magnetospheric ions to IP sho…
The Hawaii SCUBA-2 Lensing Cluster Survey: Radio-detected Submillimeter Galaxies in the HST Frontier Fields
Smail, Ian; Heywood, Ian; Desai, Vandana +5 more
In this second paper of the Hawaii SCUBA-2 Lensing Cluster Survey series, we cross-match SCUBA-2 maps with 3 and 6 GHz images from the Janksy-VLA Frontier Fields Legacy Survey for three cluster fields, MACS J0416.1-2403, MACS J0717.5+3745, and MACS J1149.5+2223. Within the HST coverage, 14 out of 44 850 µm sources have 3 GHz counterparts, fi…
Solar-insolation-induced changes in the coma morphology of comet 67P/Churyumov-Gerasimenko. Optical monitoring with the Nordic Optical Telescope
Snodgrass, C.; Schulz, R.; Nilsson, K. +4 more
Context. 67P/Churyumov-Gerasimenko (67P/C-G) is a short-period Jupiter family comet with an orbital period of 6.55 yr. Being the target comet of ESA's Rosetta mission, 67P/C-G has become one of the most intensively studied minor bodies of the solar system. The Rosetta Orbiter and the Philae Lander have brought us unique information about the struc…