Search Publications
Missions
Journals
Publication Years
Beyond the disk: EUV coronagraphic observations of the Extreme Ultraviolet Imager on board Solar Orbiter
Zhang, X.; Schmutz, W.; Mierla, M. +38 more
Context. Most observations of the solar corona beyond 2 R⊙ consist of broadband visible light imagery carried out with coronagraphs. The associated diagnostics mainly consist of kinematics and derivations of the electron number density. While the measurement of the properties of emission lines can provide crucial additional diagnostics …
Deuterium fractionation across the infrared-dark cloud G034.77−00.55 interacting with the supernova remnant W44
Caselli, P.; Viti, S.; Jiménez-Serra, I. +10 more
Context. Supernova remnants (SNRs) may regulate star formation in galaxies. For example, SNR-driven shocks may form new molecular gas or compress pre-existing clouds and trigger the formation of new stars.
Aims: To test this scenario, we measured the deuteration of N2H+, DfracN2H+
MeV gamma-ray constraints for light dark matter from semi-annihilation
Guo, Jun; Zhu, Bin; Wu, Lei
Exploring the realm of Dark Matter research, Light DM, which has a mass in the range of 1 MeV to 1 GeV, is a fascinating topic both theoretically and experimentally. We assume that the light dark matter is composed of complex scalars and produced from semi-annihilation, which is close to the scale of the MeV Gamma-ray satellite, allowing us to exp…
Decoding the age-chemical structure of the Milky Way disc: an application of copulas and elicitable maps
Bovy, Jo; Frankel, Neige; Leung, Henry W. +2 more
In the Milky Way, the distribution of stars in the [α/Fe] versus [Fe/H] and [Fe/H] versus age planes holds essential information about the history of star formation, accretion, and dynamical evolution of the Galactic disc. We investigate these planes by applying novel statistical methods called copulas and elicitable maps to the ages and abundance…
Forecasting the transit times of earth-directed halo CMEs using artificial neural network: A case study application with GCS forward-modeling technique
Kozarev, K.; Minta, F. N.; Elsaid, A. +2 more
Mitigating the lethal threats caused by coronal mass ejections (CMEs) on human and space operations can be accomplished with a fast and accurate forecast of Earth-directed CME transit times. The current paper presents a robust Cascade Forward Neural Network (CFNN) framework to predict the transit times of Earth-directed halo CMEs using a total of …
The unusual planetary nebula nucleus in the Galactic open cluster M37 and six further hot white dwarf candidates
Rebassa-Mansergas, Alberto; Raddi, Roberto; Torres, Santiago +6 more
Planetary nebulae in Galactic open star clusters are rare objects; only three are known to date. They are of particular interest because their distance can be determined with high accuracy, allowing one to characterize the physical properties of the planetary nebula and its ionizing central star with high confidence. Here we present the first quan…
The On-orbit Performance of the Colorado Ultraviolet Transit Experiment Mission
France, Kevin; Fleming, Brian; Nell, Nicholas +5 more
We present the on-orbit performance of the Colorado Ultraviolet Transit Experiment (CUTE). CUTE is a 6U CubeSat that launched on 2021 September 27 and is obtaining near-ultraviolet (NUV; 2480 Å-3306 Å) transit spectroscopy of short-period exoplanets. The instrument comprises a 20 cm × 8 cm rectangular Cassegrain telescope, an NUV spectrograph with…
A Candidate Dual QSO at Cosmic Noon
Lacy, Mark; Comerford, Julia M.; Simmons, Brooke D. +6 more
We report the discovery of a candidate dual QSO at z = 1.889, a redshift that is in the era known as "cosmic noon" where most of the universe's black hole and stellar mass growth occurred. The source was identified in Hubble Space Telescope WFC3/IR images of a dust-reddened QSO that showed two closely separated point sources at a projected distanc…
Source positions of an interplanetary type III radio burst and anisotropic radio-wave scattering
Maksimovic, Milan; Kontar, Eduard P.; Chen, Xingyao +7 more
Interplanetary solar radio type III bursts provide the means to remotely study and track energetic electrons propagating in the interplanetary medium. Due to the lack of direct radio source imaging, several methods have been developed to determine the source positions from space-based observations. Moreover, none of the methods consider the propag…
Simulated Observations of Star Formation Regions: Infrared Evolution of Globally Collapsing Clouds
Baes, Maarten; Fritz, Jacopo; Lin, Yuxin +6 more
A direct comparison between hydrodynamical simulations and observations is needed to improve the physics included in the former and to test biases in the latter. Post-processing radiative transfer and synthetic observations are now the standard way to do this. We report on the first application of the SKIRT radiative-transfer code to simulations o…