Search Publications
A Multiwavelength Dynamical State Analysis of ACT-CL J0019.6+0336
Hilton, Matt; Moodley, Kavilan; Wollack, Edward J. +8 more
In our study, we show a multiwavelength view of ACT-CL J0019.6+0336 (which hosts a radio halo), to investigate the cluster dynamics, morphology, and ICM. We use a combination of XMM-Newton images, Dark Energy Survey (DES) imaging and photometry, SDSS spectroscopic information, and 1.16 GHz MeerKAT data to study the cluster properties. Various X-ra…
In Situ Observations of the Ion Diffusion Region in the Venusian Magnetotail
Barabash, S.; Futaana, Y.; Wei, Y. +8 more
Utilizing the in situ observations of the Analyzer of Space Plasmas and Energetic Atoms (ASPERA 4) and the magnetometer (MAG) onboard Venus Express, we report evidence of crossing the ion diffusion region of magnetic reconnection. Evidence of magnetic reconnection is based on two cases recorded by Venus Express in the Venusian magnetotail. In both…
Asteroseismology of the heartbeat star KIC 5006817
Merc, J.; Sánchez Arias, J. P.; Beck, P. G. +2 more
This paper summarizes the project work on asteroseismology at the ERASMUS+ GATE 2020 Summer school on space satellite data. The aim was to do a global asteroseismic analysis of KIC 5006817, and quantify its stellar properties using the high-quality, state of the art space missions data. We employed the aperture photometry to analyze the data from …
Ultraluminous X-ray sources in seven edge-on spiral galaxies
Kundu, Arunav; Strader, Jay; Dage, Kristen C. +8 more
We investigate a sample of seven edge-on spiral galaxies using Chandra observations. Edge-on spiral galaxies allow us to clearly separate source associated with their star-forming regions versus the outer edges of the system, offering a clear advantage over other systems. We uncover a number of X-ray point sources across these galaxies, and after …
Jupiter's X-ray aurora during UV dawn storms and injections as observed by XMM-Newton, Hubble, and Hisaki
Coates, A. J.; Branduardi-Raymont, G.; Bonfond, B. +9 more
We present results from a multiwavelength observation of Jupiter's northern aurorae, carried out simultaneously by XMM-Newton, the Hubble Space Telescope (HST), and the Hisaki satellite in 2019 September. HST images captured dawn storms and injection events in the far-ultraviolet aurora several times during the observation period. Magnetic reconne…
UVIT study of UV bright stars in the globular cluster NGC 4147
Pradhan, Ananta C.; Mohapatra, Abhisek; Kumar, Ranjan +4 more
We present far ultraviolet (FUV) observations of globular cluster NGC 4147 using three FUV filters, BaF
Characterization of dense Planck clumps observed with Herschel and SCUBA-2
Juvela, M.; Montillaud, J.; Traficante, A. +15 more
Context. Although the basic processes of star formation (SF) are known, more research is needed on SF across multiple scales and environments. The Planck all-sky survey provided a large catalog of Galactic cold clouds and clumps that have been the target of several follow-up surveys.
Aims: We aim to characterize a diverse selection of dense, …
Solar Orbiter's encounter with the tail of comet C/2019 Y4 (ATLAS): Magnetic field draping and cometary pick-up ion waves
Fedorov, A.; Livi, S.; Müller, D. +36 more
Context. Solar Orbiter is expected to have flown close to the tail of comet C/2019 Y4 (ATLAS) during the spacecraft's first perihelion in June 2020. Models predict a possible crossing of the comet tails by the spacecraft at a distance from the Sun of approximately 0.5 AU.
Aims: This study is aimed at identifying possible signatures of the int…
The Spatial and Temporal Distribution of Nighttime Ozone and Sulfur Dioxide in the Venus Mesosphere as Deduced From SPICAV UV Stellar Occultations
Montmessin, F.; Korablev, O.; Bertaux, J. -L. +5 more
The nighttime ozone and sulfur dioxide distributions were analyzed using the entire Spectroscopy for the Investigation of the Characteristics of the Atmosphere of Venus (SPICAV) UV/Venus Express stellar occultation data set. After the discovery of an ozone layer at 100 km in the mesosphere reported by Montmessin, Bertaux, et al. (2011,
Modelling X-ray RMS spectra II: the ultrafast outflow of PDS 456
Reeves, J. N.; Alston, W. N.; Matzeu, G. A. +6 more
We present an improved model for excess variance spectra describing ultrafast outflows and successfully apply it to the luminous ($L_{\rm bol}\sim 10^{47}\mathrm{erg}\, \mathrm{s}^{-1}$) low-redshift (z = 0.184) quasar Pico del Dias Survey (PDS) 456. The model is able to account well for the broadening of the spike-like features of these outflows …