Search Publications
Interaction of Space Weather Phenomena with Mars Plasma Environment During Solar Minimum 23/24
Fedorov, A.; Nilsson, H.; Sánchez-Cano, B. +5 more
We study the interaction of three solar wind (SW) structures, two stream interaction regions, and one interplanetary coronal mass ejection, with Mars' plasma environment during November 20-27, 2007. This period corresponds to the solar minimum between the solar cycles 23 and 24 which was characterized by very low values of the SW density and dynam…
The search for extratidal star candidates around Galactic globular clusters NGC 2808, NGC 6266, and NGC 6397 with Gaia DR2 astrometry
Piatti, Andrés E.; Minniti, Dante; Fernández-Trincado, José G. +5 more
Context. Extratidal stars are stellar bodies that end up outside the tidal radius of a cluster as a result of internal processes or external forces acting upon it. The presence and spatial distribution of these stars can give us insights into the past evolution of a cluster inside our Galaxy.
Aims: Previous works suggest that globular cluster…
A Review of Electrostatic Solitary Wave Research From the Cluster Mission
Pickett, J. S.
A review of the advancements in the knowledge of electrostatic solitary waves (ESWs) made with data obtained by the four satellite Cluster mission, after 20 years in orbit, is presented. ESWs are nonlinear solitary waves or structures observed in high time resolution waveform data. The ESW pulses are the wave data representation of electron or ion…
Asteroseismology of iota Draconis and Discovery of an Additional Long-period Companion
Chaplin, William J.; Kane, Stephen R.; Stassun, Keivan G. +25 more
Giant stars as known exoplanet hosts are relatively rare due to the potential challenges in acquiring precision radial velocities and the small predicted transit depths. However, these giant host stars are also some of the brightest in the sky and so enable high signal-to-noise ratio follow-up measurements. Here, we report on new observations of t…
SPECIES. II. Stellar parameters of the EXPRESS giant star sample
Jones, M. I.; Soto, M. G.; Jenkins, J. S.
Context. As part of the search for planets around evolved stars, we can understand planet populations around significantly higher-mass stars than the Sun on the main sequence. This population is difficult to study any other way, such as using radial-velocities to measure planet masses and orbital mechanics, since the stars are too hot and rotate t…
Spectral analysis of the low-mass X-ray pulsar 4U 1822-371: Reflection component in a high-inclination system
Sanna, A.; Di Salvo, T.; Burderi, L. +6 more
Context. The X-ray source 4U 1822-371 is an eclipsing low-mass X-ray binary and X-ray pulsar, hosting a NS that shows periodic pulsations in the X-ray band with a period of 0.59 s. The inclination angle of the system is so high (80-85°) that in principle, it should be hard to observe both the direct thermal emission of the central object and the r…
CO observations toward the isolated mid-infrared bubble S44: External triggering of O-star formation by a cloud-cloud collision
Tachihara, Kengo; Fukui, Yasuo; Sano, Hidetoshi +11 more
We have performed a multi-wavelength study of the mid-infrared bubble S44 to investigate the origin of isolated high-mass star(s) and the star-formation process around the bubble formed by the H II region. We report on the results of new CO observations (12CO, 13CO J = 1-0, and 12CO J = 3-2) toward the isolated bub…
Active gas features in three HSC-SSP CAMIRA clusters revealed by high angular resolution analysis of MUSTANG-2 SZE and XXL X-ray observations
Kohno, Kotaro; Oguri, Masamune; Mroczkowski, Tony +33 more
We present results from simultaneous modelling of high angular resolution GBT/MUSTANG-2 90 GHz Sunyaev-Zel'dovich effect (SZE) measurements and XMM-XXL X-ray images of three rich galaxy clusters selected from the HSC-SSP Survey. The combination of high angular resolution SZE and X-ray imaging enables a spatially resolved multicomponent analysis, w…
Geologic and Thermal Characterization of Oxia Planum Using Mars Odyssey THEMIS Data
Rogers, A. D.; Gary-Bicas, C. E.
Oxia Planum will be the landing site for the European Space Agency ExoMars 2022 "Rosalind Franklin" mission to conduct astrobiological and geological experiments investigating the region's past. Previous orbital short wave infrared (SWIR, 1.0-2.6 µm) spectroscopic studies reported widespread phyllosilicate detections in the region suggesting…
Chemical abundances in Seyfert galaxies - VII. Direct abundance determination of neon based on optical and infrared emission lines
Feltre, Anna; Dors, O. L.; Hägele, G. F. +6 more
For the first time, neon abundance has been derived in the narrow line region from a sample of Seyfert 2 nuclei. In view of this, we compiled from the literature fluxes of optical and infrared (IR) narrow emission lines for 35 Seyfert 2 nuclei in the local universe ($z \:\lesssim \:0.06$). The relative intensities of emission lines were used to de…