Search Publications
Radio–FIR correlation: A probe into cosmic ray propagation in the nearby galaxy IC 342
Dettmar, R. -J.; Beck, R.; Tabatabaei, F. S. +6 more
Resolved studies of the correlation between the radio and far-infrared (FIR) emission from galaxies at different frequencies can unveil the interplay between star formation and the relativistic interstellar medium (ISM). Thanks to the LOFAR LoTSS observations combined with VLA, Herschel, and WISE data, we study the role of cosmic rays and magnetic…
Mars' Water Cycle and Escape: A View from Mars Express and Beyond
Aoki, S.; Villanueva, G. L.; Liuzzi, G. +12 more
The search for water on Mars has long been a theme of intense exploration, as it represents a means of addressing Mars' current climate as well as its evolution in the recent and more distant past. Since the 1970s, several missions have carried instruments to track water in the atmosphere, leading to the conceptualization of a water cycle on Mars …
Comparative study of the W UMa type binaries S Ant and ε CrA
Erdem, Ahmet; Bakış, Volkan; Blackford, Mark G. +6 more
Contact binaries challenge contemporary stellar astrophysics with respect to their incidence, structure, and evolution. We explore these issues through a detailed study of two bright examples: S Ant and $\varepsilon$ CrA, that permit high-resolution spectroscopy at a relatively good S/N ratio. The availability of high-quality photometry, including…
Establishing Baselines for Six Short-period δ Scuti Variables
Stephens, Denise C.; Hintz, Eric G.; Suggs, Christiana Z.
As part of our variable star follow-up program, we have examined a number of stars from the Asteroid Terrestrial-impact Last Alert System (ATLAS) survey. Using a combination of our own data, ATLAS data, and other archival data, we confirmed the published periods and established a baseline ephemeris for each star. This initial sample of six stars a…
CO2 in the atmosphere of Mars depleted in 13C
Vandaele, Ann Carine; Aoki, Shohei; Liuzzi, Giuliano +14 more
We present here vertically resolved measurements of the carbon isotopic composition of CO2 in the Martian atmosphere between the surface and 50 km of altitude. The results are based on data taken by the ExoMars Trace Gas Orbiter with the NOMAD instrument and have been aggregated to derive an average vertical profile of 13C/
Quasars with flare/eclipse-like variability identified in ZTF
Dannerbauer, H.; Jin, Shuowen; Shi, Yong +4 more
Active galactic nuclei (AGNs) are known to exhibit optical/ultraviolet variability and most of them can be well modelled by the damped random walks. Physical processes that are not related to the accretion disc, such as tidal disruption events (TDEs) or moving foreground dusty clouds, can cause flare-like and eclipse-like features in the optical l…
K2-399 b is not a planet: The Saturn that wandered through the Neptune desert is actually a hierarchical eclipsing binary
Kuzuhara, M.; Fridlund, M.; Montesinos, B. +19 more
Context. The transit technique has been very efficient over the past decades in detecting planet-candidate signals. The so-called statistical validation approach has become a popular way of verifying a candidate's planetary nature. However, the incomplete consideration of false-positive scenarios and data quality can lead to misinterpretation of t…
Quantitative spectroscopy of multiple OB stars: I. The quadruple system HD 37061 at the centre of Messier 43
Przybilla, N.; Aschenbrenner, P.
Context. The majority of massive stars are located in binary or multiple star systems. Compared to single stars, these objects pose additional challenges to quantitative analyses based on model atmospheres. In particular, little information is currently available on the chemical composition of such systems. Aims. The members of the quadruple star …
ALMA reveals a dust-obscured galaxy merger at cosmic noon
Ginolfi, M.; Valentino, F.; Popping, G. +3 more
Context. Galaxy mergers play a critical role in galaxy evolution. They alter the size, morphology, dynamics, and composition of galaxies. Galaxy mergers have so far mostly been identified through visual inspection of their rest-frame optical and near-IR (NIR) emission. Dust can obscure this emission, however, resulting in the misclassification of …
Numerical study on modeling the soil footpad interaction of lunar soft landers at touchdown
Pucker, T.
Soft landers are a common systems for planetary exploration and have been successfully landed on Moon, Mars and the comet Churyumov–Gerasimenko. In this study numerical simulations of the touchdown process of soft landers on the moon surface are presented. The focus is on the soil footpad interaction and the resulting loading on the primary strut …