Search Publications
An In-depth Analysis of Quiet-Sun IRIS Brightenings
Morgan, Huw; Humphries, Llŷr Dafydd; Kuridze, David
Small-scale brightenings are ubiquitous, dynamic, and energetic phenomena found in the chromosphere. An advanced filter-detection algorithm applied to high-resolution observations from the Interface Region Imaging Spectrograph enables the detection of these brightenings close to the noise level. This algorithm also tracks the movement of these bri…
z-GAL: A NOEMA spectroscopic redshift survey of bright Herschel galaxies. I. Overview (Corrigendum)
Berta, S.; Omont, A.; Buat, V. +35 more
Zone of Preferential Heating for Minor Ions in the Solar Wind
Klein, Kristopher G.; Kasper, Justin; Lepri, Susan T. +2 more
The properties of minor ions in the solar wind are important indicators of the state of the solar corona and the heating processes it undergoes as it expands. Evidence of preferential heating of minor ions has been observed in the solar wind, and is believed to be active up to a certain radial boundary, beyond which thermalization due to Coulomb c…
Spectroscopic and Photometric Confirmation of 3 Globular and 14 Intermediate-age Clusters in the Irr II Galaxy NGC 3077
Mayya, Y. D.; Rosa-González, D.; Rodríguez-Merino, L. H. +4 more
We present the results from spectroscopic and photometric analysis of 17 globular cluster (GC) candidates in the Irr II galaxy NGC 3077. The GC candidates were selected on the Hubble Space Telescope images and were cleaned of foreground Galatic stars using the GAIA parameters. We carried out aperture photometry using the multiband archival images …
Further lunar occultations results from the Trebur Observatory, 2021–24
Ohlert, J. M.; Richichi, A.
Following up on our initial paper (Richichi and Ohlert, 2021), we report here on 60 lunar occultation events recorded between February 2021 and March 2024 at the Michael Adrian Observatorium. An improved version of the detector was employed for the present work. The program aims mainly at the direct measurement of the angular diameter of late-type…
Reevaluating the Origin of Detectable Cataclysmic Variables in Globular Clusters: Testing the Importance of Dynamics
Belloni, Diogo; Rivera Sandoval, Liliana; Ramos Arevalo, Miriam
Based on the current detectable cataclysmic variable (CV) population in Galactic globular clusters (GCs), we show that there is not a clear relation between the number of sources per unit of mass and the stellar encounter rate, the cluster mass, or the cluster central density. If any, only in the case of core-collapsed GCs could there be an antico…
Addendum to "Description, accessibility and usage of SOIR/Venus Express atmospheric profiles of Venus distributed in VESPA (Virtual European Solar and Planetary Access)"
Vandaele, A. C.; Thomas, I. R.; Trompet, L. +9 more
The reference paper describing the SOIR data service available through the VESPA portal is Trompet et al. (2018). This data service contains an updated version of the profiles already available previously for AERO (aerosols), CO2, CO, H35Cl, H37Cl, HF, SO2, H2O, and HDO following Mahieux et al…
The evolution of coronal shock wave properties and their relation with solar energetic particles
Kouloumvakos, Athanasios; Rouillard, Alexis P.; Dresing, Nina +5 more
Context. Shock waves driven by fast and wide coronal mass ejections (CMEs) are considered to be very efficient particle accelerators and are involved in the production of solar energetic particle (SEP) events. These events cause space weather phenomena by disturbing the near-Earth radiation environment. In past studies, we analysed statistically t…
Two Long-period Giant Planets around Two Giant Stars: HD 112570 and HD 154391
Zhao, Gang; Wang, Wei; Song, Nan +24 more
We present the discoveries of two giant plants orbiting the red-giant-branch star HD 112570 and the red-clump star HD 154391, based on the radial-velocity (RV) measurements from the Xinglong station and Okayama Astrophysical Observatory. Spectroscopic and asteroseismic analyses suggest that HD 112570 has a mass of 1.15 ± 0.12 M ☉, a rad…
Multiwavelength radiation from the interaction between magnetar bursts and a companion star in a binary system
Wei, Da-Ming; Wei, Yu-Jia; Yang, Yuan-Pei +1 more
Magnetars are young, highly magnetized neutron stars that are associated with magnetar short bursts (MSBs), magnetar giant flares (MGFs), and at least some fast radio bursts (FRBs). In this work, we consider a magnetar and a main sequence star in a binary system and analyze the properties of the electromagnetic signals generated by the interaction…