Search Publications
RELICS: small lensed z ≥ 5.5 galaxies selected as potential Lyman continuum leakers
Treu, Tommaso; Bradač, Maruša; Strait, Victoria +8 more
We present size measurements of 78 high-redshift (z ≥ 5.5) galaxy candidates from the Reionization Lensing Cluster Survey (RELICS). These distant galaxies are well resolved due to the gravitational lensing power of foreground galaxy clusters, imaged by the Hubble Space Telescope and the Spitzer Space Telescope. We compute sizes using the forward-m…
Magnetospheric responses to solar wind Pc5 density fluctuations: Results from 2D hybrid Vlasov simulation
Alho, Markku; Johlander, Andreas; Pfau-Kempf, Yann +17 more
Ultra-low frequency (ULF) waves are routinely observed in Earth's dayside magnetosphere. Here we investigate the influence of externally-driven density variations in the near-Earth space in the ULF regime using global 2D simulations performed with the hybrid-Vlasov model Vlasiator. With the new time-varying boundary setup, we introduce a monochrom…
First eROSITA-TESS results for M dwarfs: Mass dependence of the X-ray activity rotation relation and an assessment of sensitivity limits
Stelzer, B.; Raetz, St.; Magaudda, E.
We present a study of the activity-rotation relation for M dwarf stars, using new X-ray data from the ROentgen Survey with an Imaging Telescope Array (eROSITA) on board the Russian Spektrum-Roentgen-Gamma mission (SRG), combined with photometric rotation periods from the Transiting Exoplanet Survey Satellite (TESS). The stars used in this work are…
The EXCITING Experiment Exploring the Behavior of Nitrogen and Noble Gases in Interstellar Ice Analogs
Bekaert, David V.; Broadley, Michael W.; Marty, Bernard +3 more
Comets represent some of the most pristine bodies in our solar system and can provide a unique insight into the chemical makeup of the early solar system. Due to their icy volatile-rich nature, they may have played an important role in delivering volatile elements and organic material to the early Earth. Understanding how comets form can therefore…
Revisit NGC 5466 tidal stream with Gaia, SDSS/SEGUE, and LAMOST
Zhao, Gang; Zhao, Jing-Kun; Ishigaki, Miho N. +5 more
By mining the data from Gaia Early Data Release 3, Sloan Digital Sky Survey/Sloan Extension for Galactic Understanding and Exploration Data Release 16, and Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Release 8, 11 member stars of the NGC 5466 tidal stream are detected and 7 of them are newly identified. To reject contaminators, …
High Resolution Map of Water in the Martian Regolith Observed by FREND Neutron Telescope Onboard ExoMars TGO
Mitrofanov, I. G.; Golovin, D. V.; Litvak, M. L. +4 more
Studies of water content in the Martian subsurface by means of neutron spectroscopy is a well-known technique, very sensitive to water abundance. The FREND instrument onboard the ExoMars TGO is the latest experiment of that kind. Its major characteristic and advantage compared to the predecessors is its capability of high spatial resolution measur…
The X-ray Emission of γ Cassiopeiae During the 2020-2021 Disc Eruption
Motch, C.; Smith, M. A.; Nazé, Y. +3 more
Context. γ Cas is known for its unusually hard and intense X-ray emission. This emission could trace accretion by a compact companion, wind interaction with a hot sub-dwarf companion, or magnetic interaction between the star and its Be decretion disc.
Aims: These various scenarios should lead to diverse dependences of the hard X-ray emission …
Nobeyama 45 m Local Spur CO survey. I. Giant molecular filaments and cluster formation in the Vulpecula OB association
Miyamoto, Yusuke; Tokuda, Kazuki; Tachihara, Kengo +13 more
We have performed new large-scale 12CO, 13CO, and C18O J = 1-0 observations toward the Vulpecula OB association (l ~ 60°) as part of the Nobeyama 45 m Local Spur CO survey project. Molecular clouds are distributed over ~100 pc, with local peaks at the Sh 2-86, Sh 2-87, and Sh 2-88 high-mass star-forming regions in …
Search for Stellar Flybys in the Sco-Cen OB Association with the Gaia DR2
Kalas, Paul; De Rosa, Robert J.; Ma, Yilun
High-contrast imaging studies of debris disks have revealed a significant diversity in their morphologies, including large-scale asymmetries. Theories involving stellar flybys, an external source of gravitational disturbance, have offered a plausible explanation for the origin of these morphological variations. Our study is an experiment to gain e…
On the Nature of Rotation in the Praesepe Cluster
Hao, C. J.; Xu, Y.; Hou, L. G. +4 more
Although a large number of Galactic open clusters (OCs) have been identified, the internal kinematic properties (e.g., rotation) of almost all the known OCs are still far from clear. With the high-precision astrometric data of Gaia EDR3, we have developed a methodology to unveil the rotational properties of the Praesepe cluster. Statistics of the …