Search Publications
Relation of Jupiter's Dawnside Main Emission Intensity to Magnetospheric Currents During the Juno Mission
Nichols, J. D.; Cowley, S. W. H.
We compare Jupiter's dawn-side main auroral emission intensity observed by the Hubble Space Telescope with the simultaneous magnitude of the dawn-side magnetospheric equatorial radial current as observed by Juno during Orbits 3-7. We show that the peak auroral intensity and the square of the radial current per radian of azimuth are strongly correl…
Sensitive Multibeam Targeted SETI Observations toward 33 Exoplanet Systems with FAST
Zhu, Yan; Li, Di; Qian, Lei +19 more
As a major approach to looking for life beyond the Earth, the search for extraterrestrial intelligence (SETI) is committed to searching for technosignatures such as engineered radio signals that are indicative of technologically capable life. In this paper, we report a targeted SETI campaign employing an observation strategy named multibeam coinci…
The intracluster light on Frontier Fields clusters Abell 370 and Abell S1063
Jiménez-Teja, Yolanda; Dupke, Renato; de Oliveira, Nícolas O. L.
We analysed the contribution of the intracluster light (ICL) to the total luminosity of two massive galaxy clusters observed by the Hubble Space Telescope within the Frontier Fields program, Abell 370 (z ~ 0.375) and Abell S1063 (z ~ 0.348), in order to correlate it with the dynamical stage of these systems. We applied an algorithm based on the Ch…
A Population of Luminous Globular Clusters and Stripped Nuclei with Elevated Mass to Light Ratios around NGC 5128
Forbes, Duncan A.; Caldwell, Nelson; Strader, Jay +8 more
The dense central regions of tidally disrupted galaxies can survive as ultracompact dwarfs (UCDs) that hide among the luminous globular clusters (GCs) in the halo of massive galaxies. An exciting confirmation of this model is the detection of overmassive black holes in the centers of some UCDs, which also lead to elevated dynamical mass-to-light r…
Troposphere-to-mesosphere microphysics of carbon dioxide ice clouds in a Mars Global Climate Model
Forget, F.; Montmessin, F.; González-Galindo, F. +10 more
We have implemented full CO2 ice cloud microphysics into the LMD Mars Global Climate Model (MGCM) and we have conducted the first global simulations. The microphysical model implementation follows the modal scheme used for water ice cloud microphysics in the MGCM, but includes specific aspects that need to be accounted for when dealing …
A quantitative assessment of completeness correction methods and public release of a versatile simulation code
Treu, Tommaso; Trenti, Michele; Morishita, Takahiro +2 more
Having accurate completeness functions is crucial to the determination of the rest-frame ultraviolet luminosity functions (UVLFs) all the way back to the epoch of reionization. Most studies use injection-recovery simulations to determine completeness functions. Although conceptually similar, published approaches have subtle but important differenc…
And then they were two: Detection of non-thermal radio emission from the bow shocks of two runaway stars
Menten, K. M.; Brose, R.; Gvaramadze, V. V. +7 more
Context. In recent years, winds from massive stars have been considered promising sites for investigating relativistic particle acceleration. In particular, the resulting bow-shaped shocks from the interaction of the supersonic winds of runaway stars with interstellar matter have been intensively observed at many different wavelengths, from radio …
A Pilot Radio Search for Magnetic Activity in Directly Imaged Exoplanets
Berger, E.; Cendes, Y.; Williams, P. K. G.
We present the first systematic search for GHz frequency radio emission from directly imaged exoplanets using Very Large Array observations of sufficient angular resolution to separate the planets from their host stars. We obtained results for five systems and eight exoplanets located at ≲50 pc through new observations (Ross 458, GU Psc, and 51 Er…
The disk of FU Orionis viewed with MATISSE/VLTI. First interferometric observations in L and M bands
Waters, L. B. F. M.; Zhu, Z.; Liu, H. B. +30 more
Aims: We studied the accretion disk of the archetypal eruptive young star FU Orionis with the use of mid-infrared interferometry, which enabled us to resolve the innermost regions of the disk down to a spatial resolution of 3 milliarcseconds (mas) in the L band, that is, within 1 au of the protostar.
Methods: We used the interferometric …
Stellar dating using chemical clocks and Bayesian inference
Chaplin, W. J.; Moya, A.; Sarro, L. M. +3 more
Context. Dating stars is a major challenge with a deep impact on many astrophysical fields. One of the most promising techniques for this is using chemical abundances. Recent space- and ground-based facilities have improved the quantity of stars with accurate observations. This has opened the door for using Bayesian inference tools to maximise the…