Search Publications
GS 121-05-037: A new Galactic chimney candidate with signs of triggered star formation
Molina Lera, J. A.; Cichowolski, S.; Suad, L. A.
Aims: The goal of this study is to analyze the H I supershell GS 121-05-037 and its role in triggering star formation.
Methods: To characterize the supershell, we analyzed the H I 21-cm line and the far-infrared emission distributions. In addition, to study the star formation processes related to GS 121-05-037, we used the Gaia survey, t…
Using Computational Models to Uncover the Parameters of Three Kepler Binaries: KIC 5957123, KIC 8314879, and KIC 10727668
Odesse, Padraic E.; Lovekin, Catherine
Theories of stellar convective core overshoot can be examined through analysis of pulsating stars. Better accuracy can be achieved by obtaining external constraints such as those provided by observing pulsating stars in eclipsing binary systems, but this requires that the binary parameters be identified so photometric variations of the pulsating c…
Convective Line Shifts in the Spectra of Solar-Type Stars
Sheminova, V. A.
The Doppler line shifts in the spectra of the Sun and stars with effective temperatures from 4800 to 6200 K were measured and the average convective (granulation) velocities were estimated. The absolute scale of the line shifts for the stars was established on the basis of the derived dependence of the shifts of solar lines on optical depth. For F…
On the Hydrosphere Stability of TESS Targets: Applications to 700 d, 256 b, and 203 b
Kennefick, Julia; Bonney, Paul
A main determinant of the habitability of exoplanets is the presence of stable liquid surface water. In an era of abundant possible targets, the potential to find a habitable world remains a driving force in prioritization. We present here a data-forward method to investigate the likelihood of a stable hydrosphere on the timescales of the formatio…
Calibration of ISA accelerometer sensing axes for the BepiColombo mission
Lucente, Marco; Lefevre, Carlo; Fiorenza, Emiliano +3 more
ISA is a three-axis accelerometer embarked on-board BepiColombo, a joint ESA/JAXA space mission launched on the 19th of October 2018 at 22.45 (local time) and devoted to put two spacecraft (MPO and MMO) around Mercury (2025), for a deeper investigation of the planet and its environment. ISA aims at measuring, directly and not by modelli…
Does the Fe L-shell blend bias abundance measurements in intermediate-temperature clusters?
Grillo, Claudio; Gastaldello, Fabio; Bartalucci, Iacopo +5 more
In intermediate-mass galaxy clusters (M = 2 − 4 × 1014 M⊙, or equivalently T = 2.5 − 4.5 keV), abundance measurements are almost equally driven by iron K and L transitions at ∼6.7 keV and 0.9 − 1.3 keV, respectively. While K-shell-derived measurements are considered reliable, the resolution of the currently available instrume…
Coaxing the Eclipsing Binary V367 Cygni out of Its Shell
Davidge, T. J.
Spectra that cover 0.63-0.69 µm with a spectral resolution ~17,000 are presented of the W Serpentis system V367 Cygni. Absorption lines of Fe II and Si II that form in a circumsystem shell are prominent features, and the depths of these are stable with time, suggesting that the shell is smoothly distributed and well mixed. Further evidence o…
The Response of Saturn's Dawn Field-Aligned Currents to Magnetospheric and Ring Current Conditions During Cassini's Proximal Orbits: Evidence for a Region 2 Response at Saturn
Dougherty, M. K.; Roussos, E.; Cowley, S. W. H. +3 more
Cassini's 2017 proximal orbits provided the opportunity to examine the auroral field-aligned currents in the northern hemisphere dawn sector in relation to wider magnetospheric conditions. We combine three recent studies to examine the response of the dawn region auroral field-aligned currents and the azimuthal ring currents to compressions and ex…
Stellar population in the vicinity of the H II region G331.03-00.15
Gamen, R.; Cichowolski, S.; Cárdenas, S. B. +1 more
We present a multi-wavelength study of the H II region G331.03-00.15, with the aim of identifying the population of massive stars associated with it. The distributions of ionised gas and heated dust both exhibit similar spherical forms, while the bordering photo-dissociating region follows a very ring-like distribution, indicating the presence of …
Plasma Oscillations and Kinetic Instabilities at Ion Scales in the Expanding Magnetosheath
Trávníček, Pavel M.; Chaston, Chris C.
We investigate a relationship between a decaying spectrum of magnetic field perturbations and kinetic instabilities in a slowly expanding magnetosheath plasma using two-dimensional hybrid expanding simulations in (X, Y) space. We impose an initial ambient magnetic field B 0/B 0 = (1, 0, 0), and superimpose a flat spectrum of …