Search Publications
Depth of the dynamo region and zonal circulation of the molecular layer in Saturn inferred from its equatorially symmetric gravitational field
Schubert, Gerald; Kong, Dali; Zhang, Keke
The high-precision equatorially symmetric gravitational field of Saturn (the even gravitational coefficients J2, J4, …, J12) measured by the Cassini Grand Finale reflects its internal structure, its non-spherical shape caused by rotation and its strong zonal circulation whose location is controlled by the depth of …
Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications
Sills, Alison; Hong, Jongsuk; Deng, Licai +3 more
Blue straggler stars (BSSs) have been proposed as powerful indicators to measure the dynamical state of Galactic globular clusters (GCs). Here we examine for the first time whether this framework of BSSs as dynamical clocks, which was specifically developed for Galactic GCs, may also hold for younger GCs in the Large Magellanic Cloud (LMC). Using …
VALES V: a kinematic analysis of the molecular gas content in H-ATLAS galaxies at z ∼ 0.03-0.35 using ALMA
Leiton, R.; Bauer, F. E.; Farrah, D. +19 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) resolved observations of molecular gas in galaxies up to z = 0.35 to characterize the role of global galactic dynamics on the global interstellar medium properties. These observations consist of a sub-sample of 39 galaxies taken from the Valparaíso ALMA Line Emission Survey (VALES). Fr…
Hα emission-line stars in molecular clouds. III. Canis Major
Reipurth, Bo; Pettersson, Bertil
A deep objective-prism survey for Hα emission stars towards the Canis Major star-forming clouds was performed. A total of 398 Hα emitters were detected, 353 of which are new detections. There is a strong concentration of these Hα emitters towards the molecular clouds surrounding the CMa OB1 association, and it is likely that these stars are young …
Analysis of Quiescent Corona X-ray Spectra from SphinX During the 2009 Solar Minimum
Phillips, K. J. H.; Sylwester, B.; Sylwester, J. +3 more
The SphinX X-ray spectrophotometer on the CORONAS-PHOTON mission observed the 1 - 15 keV X-ray spectrum of the spatially integrated solar corona during the deep minimum of 2009, when solar activity was exceptionally low. Its sensitivity for energies >1.2 keV was higher than that of any other solar X-ray spectrometer in orbit at the time, includ…
Long X-ray flares from the central source in RCW 103. XMM-Newton and VLT observations in the aftermath of the 2016 outburst
Tiengo, A.; Rea, N.; Esposito, P. +7 more
We observed the slowly revolving pulsar 1E 161348-5055 (1E 1613, spin period of 6.67 h) in the supernova remnant RCW 103 twice with XMM-Newton and once with the Very Large Telescope (VLT). The VLT observation was performed on 2016 June 30, about a week after the detection of a large outburst from 1E 1613. At the position of 1E 1613, we found a nea…
Quantifying the AGN-driven outflows in ULIRGs (QUADROS) IV: HST/STIS spectroscopy of the sub-kpc warm outflow in F14394+5332
Batcheldor, D.; Ramos Almeida, C.; Tadhunter, C. +1 more
Considerable uncertainties remain about the nature of warm, AGN-driven outflows and their impact on the evolution of galaxies. This is because the outflows are often unresolved in ground-based observations. As part of a project to study the AGN outflows in some of the most rapidly evolving galaxies in the local Universe, here we present Hubble Spa…
The high-energy radiation environment of the habitable-zone super-Earth LHS 1140b
Campana, S.; Ghirlanda, G.; Ghisellini, G. +4 more
Context. In the last few years many exoplanets in the habitable zone (HZ) of M-dwarfs have been discovered, but the X-ray/UV activity of cool stars is very different from that of our Sun. The high-energy radiation environment influences the habitability, plays a crucial role for abiogenesis, and impacts the chemistry and evolution of planetary atm…
A transiting super-Earth close to the inner edge of the habitable zone of an M0 dwarf star
Bonavera, L.; Rebolo, R.; González Hernández, J. I. +9 more
We present a super-Earth orbiting close to the inner edge of the habitable zone of the cool dwarf star K2-286 (EPIC 249889081), detected with data from the K2 mission in its 15th campaign. The planet has radius of 2.1 ± 0.2 R⊕, near the 1.5-2.0 R⊕ gap in the radii distribution. The equilibrium temperature is 347^{+21}_{-11} K…
A fractal analysis application of the pre-whitening technique to δ Scuti stars time series
Garrido, R.; Suárez, J. C.; de Franciscis, S. +4 more
Fractal fingerprints have been found recently in the light curves of several δ Scuti stars observed by Convection Rotation and planetary Transits(CoRoT) satellite. This sole fact might pose a problem for the detection of pulsation frequencies using classical pre-whitening techniques, but it is also a potentially rich source for information about p…