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Observations of Water Frost on Mars With THEMIS: Application to the Presence of Brines and the Stability of (Sub)Surface Water Ice
Forget, F.; Piqueux, S.; Szantai, A. +4 more
Characterizing the exchange of water between the Martian atmosphere and the (sub)surface is a major challenge for understanding the mechanisms that regulate the water cycle. Here we present a new data set of water ice detected on the Martian surface with the Thermal Emission Imaging System (THEMIS). The detection is based on the correlation betwee…
Faint mm NIKA2 dusty star-forming galaxies: Finding the high-redshift population
Berta, S.; Aussel, H.; Adam, R. +46 more
Aims: High-redshift dusty star-forming galaxies (DSFGs) are proposed to be the progenitors of massive quiescent galaxies arising at cosmic noon, providing a crucial insight into the formation, assembly, and early quenching of massive galaxies in the early Universe. However, their high redshift combined with high dust obscuration adds signific…
Comprehensive Characterization of the Dynamics of Two Coronal Mass Ejections in the Outer Corona
Nieves-Chinchilla, Teresa; Cremades, Hebe; Balmaceda, Laura +1 more
Coronal mass ejections (CMEs) play a key role in determining space-weather conditions. Therefore, it is important to understand their evolution throughout the heliosphere. In this work, we carefully analyze the evolution of two kinematically different CMEs that erupted on 16 June 2010 and 14 June 2011, in a range of heliospheric distances of appro…
Stellar chromospheric activity database of solar-like stars based on the LAMOST Low-Resolution Spectroscopic Survey. II. The bolometric and photospheric calibration
Zhang, Jun; Zhang, Haotong; Luo, Ali +2 more
Context. The dependence of stellar magnetic activity on stellar parameters is inspired by the chromospheric activity studies based on the large-scale spectroscopic surveys.
Aims: The main objective of this project is to provide the chromospheric activity parameter database for the LAMOST Low-Resolution Spectroscopic Survey (LRS) spectra of so…
Evolving Outer Heliosphere: Tracking Solar Wind Transients from 1 au to the VLISM with IBEX and Voyager 1
Reisenfeld, D. B.; McComas, D. J.; Rankin, J. S. +5 more
Interstellar Boundary Explorer (IBEX) observations of energetic neutral atom (ENA) fluxes from the heliosphere have greatly enriched our understanding of the interaction of the solar wind (SW) with the local interstellar medium (LISM). However, there has been recent controversy surrounding the inability of most ENA models to produce as high an int…
The Resonant Structure of xGEO and Implications for Cislunar Domain Awareness
Rawat, A.; Rosengren, A.; Ross, S. +1 more
A rigorous dynamical definition for xGEO is the critical distance at which the secular contributions from the lunisolar perturbations exceed those from Earth oblateness, known in astronomical parlance as the Laplace radius. xGEO fundamentally represents a restricted four-body problem (R4BP), which can be approached locally using the perturbed-Hami…
The overflowing atmosphere of WASP-121 b: High-resolution He I λ10833 transmission spectroscopy with VLT/CRIRES+
Czesla, S.; Nortmann, L.; Reiners, A. +14 more
Transmission spectroscopy is a prime method to study the atmospheres of extrasolar planets. We obtained a high-resolution spectral transit time series of the hot Jupiter WASP-121 b with CRIRES+ to study its atmosphere via transmission spectroscopy of the He I λ10833 triplet lines. Our analysis shows a prominent He I λ10833 absorption feature movin…
Low-redshift absorption in the Seyfert galaxy PG1211+143 - a distant inflow maintaining off-plane accretion or the gravitational redshift of matter orbiting the SMBH?
Page, Kim; Pounds, Ken
The detection of a high-velocity (~0.3c) inflow of highly ionized matter during an extended XMM-Newton observation of the luminous Seyfert galaxy PG1211+143 in 2014 provided the first direct evidence of a short-lived accretion event, and an explanation for the powerful winds (UFOs) now recognized as a common property of many luminous Seyfert galax…
White Dwarf Photospheric Abundances in Cataclysmic Variables. IV. Deriving the [N/C] Ratio
Sion, Edward M.; Godon, Patrick
We present results from our ongoing far-ultraviolet archival analysis of cataclysmic variable white dwarf (WD) abundances for six more systems: four SU UMa dwarf novae (BW Scl, SW UMa, BC UMa, and VW Hyi) together with the dwarf nova RX And, and the novalike DW UMa. To derive a reliable nitrogen abundance, for the four SU UMa systems (with a WD te…
Apparent non-variable stars from the Kepler mission
Schmidt, K.; Paunzen, E.; Maitzen, H. M. +12 more
Context. The analysis of non-variable stars is generally neglected in the literature. However, such objects are needed for many calibration processes and for testing pulsational models. The photometric time series of the Kepler satellite mission still stand as the most accurate data available today and are excellently suited to the search for non-…