Search Publications
Searching for Evidence of Subchromospheric Magnetic Reconnection on the Sun
Long, D. M.; van Driel-Gesztelyi, L.; Démoulin, P. +13 more
Within the coronae of stars, abundances of those elements with low first ionization potential (FIP) often differ from their photospheric values. The coronae of the Sun and solar-type stars mostly show enhancements of low-FIP elements (the FIP effect) while more active stars such as M dwarfs have coronae generally characterized by the inverse-FIP (…
Ionized Carbon in Galaxies: The [C II] 158 µm Line as a Total Molecular Gas Mass Tracer Revisited
Zhang, Zhi-Yu; Zhao, Yinghe; Liu, Jiamin +1 more
In this paper, we present a statistical study of the [C II] 158 µm line and the CO(1‑0) emission for a sample of ∼200 local and high-z (32 sources with z > 1) galaxies with very different physical conditions. We explore the correlation between the luminosities of [C II] and CO(1‑0) lines and obtain a strong linear relationship, confirming…
Forecasting Constraints from Surface Brightness Fluctuations in Galaxy Clusters
Romero, Charles E.
Studies of surface brightness (SB) fluctuations in the intracluster medium present an indirect estimate of turbulent pressure support and associated Mach numbers. While high-resolution X-ray spectroscopy can directly constrain line-of-sight gas motions, including those due to turbulence, such observations are relatively expensive and will be limit…
Planetary nebulae of the Large Magellanic Cloud. I. A multiwavelength analysis
Bianchi, S.; Dell'Agli, F.; Ventura, P. +5 more
Context. Planetary nebulae (PNe) have three main components: a central star (CS), ionized gas, and dust in the nebula. Each contains critical chemical fingerprints of the PN's evolution, which serve as tracers of the evolution, nucleosynthesis, and dust production that occurred during the preceding asymptotic giant branch (AGB) phase.
Aims: W…
Formation and Eruption of a Hot Channel Magnetic Flux Rope in a Nested Double Null Magnetic System
Yao, Surui; Shen, Yuandeng; Zhou, Chengrui +2 more
The coronal magnetic topology significantly affects the outcome of magnetic flux rope (MFR) eruptions. The recently reported nested double null magnetic system remains unclear as to how it affects MFR eruptions. Using observations from the New Vacuum Solar Telescope and the Solar Dynamics Observatory, we studied the formation and successful erupti…
An extreme ultra-compact X-ray binary in a globular cluster: multiwavelength observations of RZ 2109 explored in a triple system framework
Kundu, Arunav; Dage, Kristen C.; Zepf, Stephen E. +6 more
The globular cluster ultraluminous X-ray source, RZ 2109, is a complex and unique system that has been detected at X-ray, ultraviolet, and optical wavelengths. Based on almost 20 yr of Chandra and XMM-Newton observations, the X-ray luminosity exhibits order of magnitude variability, with the peak flux lasting on the order of a few hours. We perfor…
Impact of radial interplanetary magnetic fields on the inner coma of comet 67P/Churyumov-Gerasimenko. Hybrid simulations of the plasma environment
Goetz, Charlotte; Gunell, Herbert; Fatemi, Shahab
Context. The direction of the interplanetary magnetic field determines the nature of the interaction between a Solar System object and the solar wind. For comets, it affects the formation of both a bow shock and other plasma boundaries, as well as mass-loading. Around the nucleus of a comet, there is a diamagnetic cavity, where the magnetic field …
Dust-obscured Galaxies in the XMM-SERVS Fields: Selection, Multiwavelength Characterization, and Physical Nature
Brandt, W. N.; Yu, Zhibo; Zou, Fan +7 more
Dust-obscured galaxies (DOGs) are enshrouded by dust and many are believed to host accreting supermassive black holes (SMBHs), which makes them unique objects for probing the coevolution of galaxies and SMBHs. We select and characterize DOGs in the 13 deg2 XMM-Spitzer Extragalactic Representative Volume Survey (XMM-SERVS), leveraging th…
Two shell- and wing-shaped supernova remnants. Investigating the molecular environments around VRO 42.05.01 and G 350.0-2.0
Vink, Jacco; Domček, Vladimir; Zhou, Ping +6 more
Supernova remnants (SNRs) are profoundly affected by their ambient medium. In particular, SNRs with a mixed morphology (characterised by a shell-like radio morphology and centrally filled X-ray emission) are thought to be the result of the interaction of a supernova explosion with a dense environment. In this work, we present carbon monoxide (CO) …
Solar Flare Ribbon Fronts. II. Evolution of Heating Rates in Individual Flare Footpoints
Polito, Vanessa; Xu, Yan; Kerr, Graham S. +1 more
Solar flare ribbon fronts appear ahead of the bright structures that normally characterize solar flares, and can persist for an extended period of time in spatially localized patches before transitioning to "regular" bright ribbons. They likely represent the initial onset of flare energy deposition into the chromosphere. Chromospheric spectra (e.g…