Search Publications
X-CIGALE: Fitting AGN/galaxy SEDs from X-ray to infrared
Ciesla, L.; Papovich, C.; Brandt, W. N. +6 more
Code Investigating GALaxy Emission (CIGALE) is a powerful multiwavelength spectral energy distribution (SED) fitting code for extragalactic studies. However, the current version of CIGALE is not able to fit X-ray data, which often provide unique insights into active galactic nucleus (AGN) intrinsic power. We develop a new X-ray module for CIGALE, …
Asteroid masses obtained with INPOP planetary ephemerides
Fienga, A.; Avdellidou, C.; Hanuš, J.
In this paper, we present masses of 103 asteroids deduced from their perturbations on the orbits of the inner planets, in particular Mars and the Earth. These determinations and the INPOP19a planetary ephemerides are improved by the recent Mars orbiter navigation data and the updated orbit of Jupiter based on the Juno mission data. More realistic …
Precise astrometry and diameters of asteroids from occultations - a data set of observations and their interpretation
Herald, David; Gault, David; Anderson, Robert +10 more
Occultations of stars by asteroids have been observed since 1961, increasing from a very small number to now over 500 annually. We have created and regularly maintain a growing data set of more than 5000 observed asteroidal occultations. The data set includes the raw observations, astrometry at the 1 mas level based on centre of mass or figure (no…
Discovery of a mid-infrared protostellar outburst of exceptional amplitude
Minniti, D.; Stecklum, B.; Saito, R. K. +12 more
We report the discovery of a mid-infrared outburst in a young stellar object (YSO) with an amplitude close to 8 mag at λ ≈ 4.6 µm. WISEA J142238.82-611553.7 is one of 23 highly variable Wide-field Infrared Survey Explorer (WISE) sources discovered in a search of infrared dark clouds (IRDCs). It lies within the small IRDC G313.671-0.309 (d ≈2…
NEPSC2, the North Ecliptic Pole SCUBA-2 survey: 850-µm map and catalogue of 850-µm-selected sources over 2 deg2
Hashimoto, Tetsuya; Kim, Seong Jin; Conselice, Christopher J. +27 more
We present an 850-µm mosaic map and extracted catalogue of submillimetre sources in the extended North Ecliptic Pole (NEP) region over about 2 deg2. The 850-µm map is constructed using newly obtained observations by SCUBA-2 at the East Asian Observatory's James Clerk Maxwell Telescope, carried out using the observatory's lar…
Extinction-free Census of AGNs in the AKARI/IRC North Ecliptic Pole Field from 23-band infrared photometry from Space Telescopes
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +21 more
In order to understand the interaction between the central black hole and the whole galaxy or their co-evolution history along with cosmic time, a complete census of active galactic nucleus (AGN) is crucial. However, AGNs are often missed in optical, UV, and soft X-ray observations since they could be obscured by gas and dust. A mid-infrared (MIR)…
X-ray properties of dust-obscured galaxies with broad optical/UV emission lines
Brandt, William N.; Garmire, Gordon P.; Zou, Fan +4 more
Dust-obscured galaxies (DOGs) with extreme infrared luminosities may represent a key phase in the co-evolution of galaxies and supermassive black holes. We select 12 DOGs at 0.3 ≲ z ≲ 1.0 with broad Mg II or H β emission lines and investigate their X-ray properties utilizing snapshot observations (~3 ks per source) with Chandra. By assuming that t…
The extreme colliding-wind system Apep: resolved imagery of the central binary and dust plume in the infrared
Callingham, J. R.; Crowther, P. A.; Marcote, B. +6 more
The recent discovery of a spectacular dust plume in the system 2XMM J160050.7-514245 (referred to as 'Apep') suggested a physical origin in a colliding-wind binary by way of the 'Pinwheel' mechanism. Observational data pointed to a hierarchical triple-star system, however, several extreme and unexpected physical properties seem to defy the establi…
CFHT MegaPrime/MegaCam u-band source catalogue of the AKARI North Ecliptic Pole Wide field
Hashimoto, Tetsuya; Goto, Tomotsugu; Kim, Seong Jin +10 more
The $AKARI$ infrared (IR) space telescope conducted two surveys (Deep and Wide) in the North Ecliptic Pole (NEP) field to find more than 100 000 IR sources using its infrared camera (IRC). IRC's nine filters, which cover wavebands from 2 to 24 µm continuously, make $AKARI$ unique in comparison with other IR observatories such as $Spitzer$ or…
Polarimetric and radiative transfer modelling of HD 172555
Scicluna, Peter; Bailey, Jeremy; Cotton, Daniel V. +3 more
The debris disc around HD 172555 was recently imaged in near-infrared polarized scattered light by the Very Large Telescope's Spectro-Polarimetric High-contrast Exoplanet REsearch instrument. Here we present optical aperture polarization measurements of HD 172555 by the HIgh Precision Polarimetric Instrument (HIPPI), and its successor HIPPI-2 on t…