Search Publications
Occurrence Rates of Exosatellites Orbiting 3–30 M Jup Hosts from 44 Spitzer Light Curves
Vanderburg, Andrew; Dai, Fei; Vos, Johanna M. +1 more
We conduct a comprehensive search for transiting exomoons and exosatellites within 44 archival Spitzer light curves of 32 substellar worlds with estimated masses ranging between 3 and 30 M Jup. This sample's median host mass is 16 M Jup, inclusive of 14 planetary-mass objects, among which one is a wide-orbit exoplanet. We sea…
Dynamical modeling and characteristic analysis of orbits around a comet
He, Yuchen; Wang, Yue; Tian, Lin
As a frontier field of deep-space explorations, the study of comets is of great value to planetary scientific research, resource exploration, and planetary defense. To date, only the ESA's Rosetta spacecraft successfully orbited the comet 67P. The orbital dynamical environment around comets is more complex than that of other small bodies, making t…
The ArgusSpec Prototype: Autonomous Spectroscopic Follow-up of Flares Detected by Large Array Telescopes
Law, Nicholas M.; Corbett, Hank; Carney, Jonathan +7 more
ArgusSpec is a prototype autonomous spectroscopic follow-up instrument designed to characterize flares detected by the Argus Pathfinder telescope array by taking short exposure (30 s) broadband spectra (370–750 nm) at low resolutions (R ∼ 150 at 500 nm). The instrument is built from consumer off-the-shelf astronomical equipment, assembled inside a…
Modelling the dust emission of a filament in the Taurus molecular cloud
Juvela, Mika
Context. Dust emission is an important tool in studies of star-forming clouds as a tracer of column density. This is done indirectly via the dust evolution that is connected to the history and physical conditions of the clouds.
Aims: We examine the radiative transfer (RT) modelling of dust emission over an extended cloud region, using a filam…
A Multiwavelength Approach to Constraining the Merger Properties of ACT-CL J0034.4+0225
Hilton, Matt; Sifón, Cristóbal; Hughes, John P. +10 more
ACT-CL J0034.4+0225 is a previously unrecognized merging galaxy cluster at z = 0.38588 ± 0.00068. Our primary evidence is provided by a 21 ks Chandra image that shows two surface brightness peaks separated by ∼49″ (259 kpc) surrounded by an extended cluster gas distribution. Each gas peak contains a brightest cluster galaxy, offset from the gas pe…
Quantitative modelling of type Ia supernovae spectral time series: constraining the explosion physics
Maguire, K.; Ackley, K.; Magee, M. R. +2 more
Multiple explosion mechanisms have been proposed to explain type Ia supernovae (SNe Ia). Empirical modelling tools have also been developed that allow for fast, customized modelling of individual SNe and direct comparisons between observations and explosion model predictions. Such tools have provided useful insights, but the subjective nature with…
A pilot study of Galactic radio recombination lines using FAST: Identification of diffuse ionized gas clumps and off-arm star-forming regions
Fang, Min; Li, Juan; Li, Shanghuo +6 more
Observing low-frequency decimeter hydrogen radio recombination lines (RRLs) with large single-dish telescopes, such as the Five-hundred-meter Aperture Spherical radio Telescope (FAST) in the L band, is a unique method for probing massive star formation on scales of hundreds of parsecs. This approach is particularly effective for detecting relative…
The Nature of 500 micron Risers III: a small complete sample
Pérez-Fournon, I.; Clements, D. L.; Riechers, D. +4 more
Herschel surveys have found large numbers of sources with red far-IR colours, and spectral energy distributions (SEDs) rising from 250 to 500 µm: 500 risers. The nature and role of these sources is not fully understood. We here present Submillimeter Array (SMA) interferometric imaging at 200 GHz of a complete sample of five 500 risers with F500 &g…
Exploring the case for hard-X-ray beaming in NGC 6946 X-1
Soria, Roberto; Middleton, Matthew J.; Roberts, Timothy P. +5 more
In order to understand the nature of super-Eddington accretion we must explore both the emission emerging directly from the inflow and its impact on the surroundings. In this paper, we test whether we can use the optical line emission of spatially resolved, ionized nebulae around ultraluminous X-ray sources (ULXs) as a proxy for their X-ray lumino…
The response of the cometary ionosphere to space weather forcing
Timar, Aniko; Nemeth, Zoltan; Burch, James L.
The Rosetta spacecraft observed the temporal evolution of the ion populations within the ionosphere of comet 67P/Churyumov-Gerasimenko. A striking feature of the ion spectrum is represented by the so-called medium-energy ion peaks, which recurrently emerge from the low-energy ion background with their energy levels typically reaching 50 to 1000 eV…