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The luminosity functions and redshift evolution of satellites of low-mass galaxies in the COSMOS survey
Roberts, Daniella M.; Nierenberg, Anna M.; Peter, Annika H. G.
The satellite populations of the Milky Way, and Milky Way mass galaxies in the local Universe, have been extensively studied to constrain dark matter and galaxy evolution physics. Recently, there has been a shift to studying satellites of hosts with stellar masses between that of the Large Magellanic Cloud and the Milky Way, since they can provide…
Mars3DNet: CNN-Based High-Resolution 3D Reconstruction of the Martian Surface from Single Images
Liu, Wai Chung; Wu, Bo; Chen, Zeyu
Three-dimensional (3D) surface models, e.g., digital elevation models (DEMs), are important for planetary exploration missions and scientific research. Current DEMs of the Martian surface are mainly generated by laser altimetry or photogrammetry, which have respective limitations. Laser altimetry cannot produce high-resolution DEMs; photogrammetry…
[C II] 158 µm line emission from Orion A I. A template for extragalactic studies?
Wolfire, M. G.; Teyssier, D.; Goicoechea, J. R. +10 more
Context. The [C II] 158 µm fine-structure line is one of the dominant coolants of the neutral interstellar medium. It is hence one of the brightest far-infrared (FIR) emission lines and can be observed not only in star-forming regions throughout the Galaxy, but also in the diffuse interstellar medium and in distant galaxies. [C II] line emis…
Spectro-imagery of an active tornado-like prominence: Formation and evolution
Barczynski, Krzysztof; Schmieder, Brigitte; Labrosse, Nicolas +3 more
Context. The dynamical nature of fine structures in prominences remains an open issue, including rotating flows in tornado prominences. While the Atmospheric Imaging Assembly imager aboard the Solar Dynamics Observatory allowed us to follow the global structure of a tornado-like prominence for five hours, the Interface Region Imaging Spectrograph,…
Giant Outer Transiting Exoplanet Mass (GOT 'EM) Survey. I. Confirmation of an Eccentric, Cool Jupiter with an Interior Earth-sized Planet Orbiting Kepler-1514
Vanderburg, Andrew; Kane, Stephen R.; Howard, Andrew W. +9 more
Despite the severe bias of the transit method of exoplanet discovery toward short orbital periods, a modest sample of transiting exoplanets with orbital periods greater than 100 days is known. Long-term radial velocity (RV) surveys are pivotal to confirming these signals and generating a set of planetary masses and densities for planets receiving …
Cluster After 20 Years of Operations: Science Highlights and Technical Challenges
Escoubet, C. P.; Bogdanova, Y. V.; Goldstein, M. L. +7 more
The Cluster mission was the first constellation using four identical spacecraft to study Sun-Earth connection plasma processes. Using four spacecraft in a tetrahedron shape, it could measure, for the first time, 3D quantities such as electrical currents, plasma gradients or divergence of the electron pressure tensor and 3D structures such as bound…
Constraining the cosmic UV background at z > 3 with MUSE Lyman-α emission observations
Richard, Johan; Marino, Raffaella Anna; Wisotzki, Lutz +10 more
The intensity of the Cosmic UV background (UVB), coming from all sources of ionizing photons such as star-forming galaxies and quasars, determines the thermal evolution and ionization state of the intergalactic medium (IGM) and is, therefore, a critical ingredient for models of cosmic structure formation. Most of the previous estimates are based o…
TOI 122b and TOI 237b: Two Small Warm Planets Orbiting Inactive M Dwarfs Found by TESS
Latham, David W.; Ziegler, Carl; Collins, Karen A. +39 more
We report the discovery and validation of TOI 122b and TOI 237b, two warm planets transiting inactive M dwarfs observed by the Transiting Exoplanet Survey Satellite (TESS). Our analysis shows that TOI 122b has a radius of 2.72 ± 0.18 R⊕ and receives 8.8 ± 1.0 times Earth's bolometric insolation, and TOI 237b has a radius of 1.44±0.12 R<…
A possible bright ultraviolet flash from a galaxy at redshift z ≈ 11
Ho, Luis C.; Jiang, Linhua; Cai, Zheng +8 more
In the optical sky, minutes-duration transients from cosmological distances are rare. Known objects that give rise to such transients include gamma-ray bursts (GRBs), the most luminous explosions in the Universe1 that have been detected at redshifts as high as z ≈ 9.4 (refs. 2-4). These high-redshift GRBs and their associated…
Modelling rebrightenings, reflares, and echoes in dwarf nova outbursts
Hameury, J. -M.; Lasota, J. -P.
Context. The disc instability model (DIM) accounts well for most of the observed properties of dwarf novae and soft X-ray transients, but the rebrightenings, reflares, and echoes occurring at the end of outbursts or shortly after in WZ Sge stars or soft X-ray transients have not yet been convincingly explained by any model.
Aims: We determine…