Search Publications
High-energy Variability of PSR J1311-3430
An, Hongjun; Kerr, Matthew; Romani, Roger W. +2 more
We have studied the variability of the black-widow-type binary millisecond pulsar PSR J1311-3430 from optical to gamma-ray energies. We confirm evidence for orbital modulation in the weak off-pulse ≳200 MeV emission, with a peak at {φ }B≈ 0.8, following pulsar inferior conjunction. The peak has a relatively hard spectrum, extending abov…
Explosive Chromospheric Evaporation Driven by Nonthermal Electrons around One Footpoint of a Solar Flare Loop
Huang, Y.; Li, D.; Zhang, Q. M. +1 more
We explore the temporal relationship between microwave/hard X-ray (HXR) emission and Doppler velocity during the impulsive phase of a solar flare on 2014 October 27 (SOL2014-10-27) that displays a pulse on the light curves in the microwave (34 GHz) and HXR (25-50 keV) bands before the flare maximum. Imaging observation shows that this pulse mainly…
ALMA Observations of a Quiescent Molecular Cloud in the Large Magellanic Cloud
Rosolowsky, Erik; Hughes, Annie; Bernard, Jean-Philippe +19 more
We present high-resolution (subparsec) observations of a giant molecular cloud in the nearest star-forming galaxy, the Large Magellanic Cloud. ALMA Band 6 observations trace the bulk of the molecular gas in 12CO(2-1) and the high column density regions in 13CO(2-1). Our target is a quiescent cloud (PGCC G282.98-32.40, which w…
Interannual and seasonal changes in the south seasonal polar cap of Mars: Observations from MY 28-31 using MARCI
James, P. B.; Cantor, B. A.; Calvin, W. M.
The Mars Color Imager (MARCI) camera on the Mars Reconnaissance Orbiter provides daily synoptic coverage that allows monitoring of seasonal cap retreat and interannual changes that occur between Mars Years (MY) and over the southern summer. We present the first analysis of this data for the southern seasonal cap evolution observed in MY 28, 29, 30…
Quantifying the (X/peanut)-shaped structure of the Milky Way - new constraints on the bar geometry
Ciambur, Bogdan C.; Bland-Hawthorn, Joss; Graham, Alister W.
The nature, size and orientation of the Milky Way's bar and `bulge' have been the subject of conflicting interpretations in the literature. Here, we present a novel approach to inferring the properties of the long bar, which extends beyond the inner `bulge', by using information encoded in the Galaxy's X/peanut (X/P)-shaped structure. We perform a…
The β Pictoris association: Catalog of photometric rotational periods of low-mass members and candidate members
Messina, S.; Medhi, B. J.; Zhang, L. +19 more
Aims: We intended to compile the most complete catalog of bona fide members and candidate members of the β Pictoris association, and to measure their rotation periods and basic properties from our own observations, public archives, and exploring the literature.
Methods: We carried out a multi-observatories campaign to get our own photome…
Snow precipitation on Mars driven by cloud-induced night-time convection
Montmessin, Franck; Hinson, David P.; Forget, François +4 more
Although it contains less water vapour than Earth's atmosphere, the Martian atmosphere hosts clouds. These clouds, composed of water-ice particles, influence the global transport of water vapour and the seasonal variations of ice deposits. However, the influence of water-ice clouds on local weather is unclear: it is thought that Martian clouds are…
Astrophysical properties of star clusters in the Magellanic Clouds homogeneously estimated by ASteCA
Perren, G. I.; Vázquez, R. A.; Piatti, A. E.
Aims: We seek to produce a homogeneous catalog of astrophysical parameters of 239 resolved star clusters, located in the Small and Large Magellanic Clouds, observed in the Washington photometric system.
Methods: The cluster sample was processed with the recently introduced Automated Stellar Cluster Analysis (ASteCA) package, which ensure…
KIC 4150611: a rare multi-eclipsing quintuple with a hybrid pulsator
Kambe, E.; Maehara, H.; Hełminiak, K. G. +5 more
Aims: We aim to analyse KIC 4150611 (HD 181469) - an interesting, bright quintuple system that includes a hybrid δ Sct/γ Dor pulsator. Four periods of eclipses - 94.2, 8.65, 1.52 and 1.43 d - have been observed by the Kepler satellite, and three point sources (A, B, and C) are seen in high angular resolution images.
Methods: From spectro…
The 999th Swift gamma-ray burst: Some like it thermal. A multiwavelength study of GRB 151027A
Prandoni, I.; Covino, S.; D'Avanzo, P. +23 more
We present a multiwavelength study of GRB 151027A. This is the 999th gamma-ray burst detected by the Swift satellite and it has a densely sampled emission in the X-ray and optical band and has been observed and detected in the radio up to 140 days after the prompt. The multiwavelength light curve from 500 s to 140 days can be modelled through a st…