Search Publications
Properties of the SCUBA-2 850 µm Sources in the Akari NEP-Deep Field
Goto, Tomotsugu; Kim, Seong Jin; Pearson, Chris +15 more
We carry out the study of SMGs in the AKARI NEP-Deep field using James Clerk Maxwell Telescope (JCMT) SCUBA-2 850 µm source catalog released as a part of SCUBA-2 Cosmology Legacy Survey (S2CLS) program. The SCUBA-2 850 µm map has a root mean square (rms) noise of 1.2 mJy beam^{-1} and covers an area of 0.60 degree^{2}. We find 4 sub-mi…
GIADA performance during Rosetta mission scientific operations at comet 67P
Fulle, M.; Rodriguez, J.; Colangeli, L. +16 more
The Grain Impact Analyser and Dust Accumulator (GIADA) instrument onboard Rosetta studied the dust environment of comet 67P/Churyumov-Gerasimenko from 3.7 au inbound, through perihelion, to 3.8 au outbound, measuring the dust flow and the dynamic properties of individual particles. GIADA is composed of three subsystems: (1) Grain Detection System …
The LABOCA/ACT Survey of Clusters at All Redshifts: Multiwavelength Analysis of Background Submillimeter Galaxies
Hilton, Matt; Bond, J. Richard; Dünner, Rolando +12 more
We present a multiwavelength analysis of 48 submillimeter galaxies (SMGs) detected in the Large APEX Bolometer Camera/Atacama Cosmology Telescope (ACT) Survey of Clusters at All Redshifts, LASCAR, which acquired new 870 µm and Australia Telescope Compact Array 2.1 GHz observations of 10 galaxy clusters detected through their Sunyaev-Zel’dovi…
Search for companions in visual binary systems using precise radial-velocity measurements
Sato, Bun'ei; Itoh, Yoichi; Katoh, Noriyuki
The frequency of triple and quadruple systems is considered to be high in the early phase of star formation. Some multiple systems decay in the pre-main-sequence phase. The multiplicity of main-sequence stars provides clues about the evolution of binary systems. This work searched for companions of five components of visual binary systems using pr…
X-ray stars observed in LAMOST spectral survey
Shi, Jianrong; Han, Xianming L.; Lu, Hong-peng +1 more
X-ray stars have been studied since the beginning of X-ray astronomy. Investigating and studying the chromospheric activity from X-ray stellar optical spectra is highly significant in providing insights into stellar magnetic activity. The big data of LAMOST survey provides an opportunity for researching stellar optical spectroscopic properties of …
Chromospheric Response during the Precursor and the Main Phase of a B6.4 Flare on 2005 August 20
Awasthi, Arun Kumar; Liu, Rui; Berlicki, Arkadiusz +2 more
Solar flare precursors depict a constrained rate of energy release, in contrast to the imminent rapid energy release, which calls for a different regime of plasma processes to be at play. Due to the subtle emission during the precursor phase, its diagnostics remain delusive, revealing either nonthermal electrons (NTEs) or thermal conduction to be …
ALMA Observation of NGC 5135: The Circumnuclear CO (6-5) and Dust Continuum Emission at 45 pc Resolution
Inami, Hanae; van der Werf, Paul; Gao, Yu +10 more
We present high-resolution (0.″17 × 0.″14) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the CO (6-5) line and 435 µm dust continuum emission within a ∼9″ × 9″ area centered on the nucleus of the galaxy NGC 5135. NGC 5135 is a well-studied luminous infrared galaxy that also harbors a Compton-thick active galactic nucleu…
Discovery of two bright DO-type white dwarfs
Geier, S.; Reindl, Nicole; Østensen, R. H.
We discovered two bright DO-type white dwarfs, GALEX J053628.3+544854 (J0536+5448) and GALEX J231128.0+292935(J2311+2929), which rank among the eight brightest DO-type white dwarfs known. Our non-LTE model atmosphere analysis reveals effective temperatures and surface gravities of {T_eff} = 80000± 4600 K and log g = 8.25± 0.15 for J0536+5448 and {…
XMM-Newton X-ray and HST weak gravitational lensing study of the extremely X-ray luminous galaxy cluster Cl J120958.9+495352 (z = 0.902)
Thölken, Sophia; Schrabback, Tim; Reiprich, Thomas H. +6 more
Context. Observations of relaxed, massive, and distant clusters can provide important tests of standard cosmological models, for example by using the gas mass fraction. To perform this test, the dynamical state of the cluster and its gas properties have to be investigated. X-ray analyses provide one of the best opportunities to access this informa…
Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring
Sfair, Rafael; Winter, Othon C.; Souza, Alexandre P. S. +3 more
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between 30% and 50% larger than previously announced. We also verified that the ring behaves like a firefly. It can only be seen from …