Search Publications
Correlations between IR Luminosity, Star Formation Rate, and CO Luminosity in the Local Universe
De Zotti, Gianfranco; Bianchi, Simone; Casasola, Viviana +5 more
We exploit the DustPedia sample of galaxies within approximately 40 Mpc, selecting 388 sources, to investigate the correlations between IR luminosity (LIR), the star formation rate (SFR), and the CO(1-0) luminosity (LCO) down to much lower luminosities than reached by previous analyses. We find a sub-linear dependence of the …
The Polar Stratosphere of Jupiter
Zhang, X.; Johnson, R. E.; Hueso, R. +13 more
Observations of the Jovian upper atmosphere at high latitudes in the UV, IR and mm/sub-mm all indicate that the chemical distributions and thermal structure are broadly influenced by auroral particle precipitations. Mid-IR and UV observations have shown that several light hydrocarbons (up to 6 carbon atoms) have altered abundances near Jupiter's m…
First photometric study of W UMa-type binary systems: BK Vul and V699 Cep
Soydugan, E.; Adalalı, S.
In this study, new CCD photometric observations and photometric analysis of BK Vul and V699 Cep systems, which are classified as contact binaries in the literature, are presented. For the V699 Cep, the TESS light curve was also used in the photometric analysis. We determined the basic astrophysical parameters of the BK Vul and V699 Cep systems fro…
The hydrology of the Jezero crater paleolake: Implications for the climate and limnology of the lake system from hydrological modeling
Horvath, David G.; Andrews-Hanna, Jeffrey C.
The lake stages in Jezero are consistent with semiarid climates The Jezero lake was a throughflow lake driven by significant surface runoff Hydrological conditions do not favor large-scale evaporite deposition Similar climates at Jezero and Gale produce contrasting lacustrine environments
Gaia (DR3)-based astronomical analysis of the seven unstudied open star clusters
Tadross, A. L.; Badawy, W. A.; Hendy, Y. H. M. +2 more
The seven open star clusters FSR 0717, FSR 1698, Loden 2313, Ruprecht 49, Majaess 61, Mayer 2, and Teutsch 48, which are located near the Milky Way's Galactic plane are studied in this article using the Gaia DR3 dataset. The estimated numbers of potential cluster members are 102, 362, 285, 197, 95, 116, 160, and 397, correspondingly. The calculate…
Subaru/CHARIS High-resolution Mode Spectroscopy of the Brown Dwarf Companion HD 33632 Ab
Jensen-Clem, Rebecca; Lewis, Briley L.; Fitzgerald, Michael P. +6 more
Brown dwarfs (BDs) are model degenerate in age and mass. High-contrast imaging and spectroscopy of BD companions to host stars where the mass and age can be independently constrained by dynamics and stellar age indicators, respectively, provide valuable tests of BD evolution models. In this paper, we present a new epoch of Subaru/CHARIS H- and K-b…
Secular aberration drift in stellar proper motions. An additional term due to the change in line-of-sight direction
Liu, N.; Zhu, Z.; Liu, J. -C.
Context. The motion of the Solar System barycenter (SSB), the spatial origin of the International Celestial Reference System, causes a directional displacement known as secular aberration. The secular aberration drift caused by the galactocentric acceleration of the SSB has been modeled in the third generation of the International Celestial Refere…
Revisiting the accretion disc spectra of dwarf novae and nova-like variables: implications for the standard disc model
Pringle, J. E.; Naylor, T.; Zsidi, Gabriella +1 more
Accretion discs are fundamental to much of astronomy. They can occur around stars, both young and old, around compact objects they provide a window into the extremes of physics, and around supermassive black holes in galaxy centres, they generate spectacular luminosities that can outshine the entire galaxy. However, our understanding of the inner …
Cassini UVIS Observations of the Enceladus Auroral Footprint on Saturn in 2017
Pryor, Wayne R.; Magalhães, Fabiola P.; Lamy, Laurent +5 more
Ultraviolet Imaging Spectrograph (UVIS) observations show the Enceladus auroral footprint on Saturn on 2017 September 14, near the end of the Cassini mission. A series of Saturn north polar auroral images were obtained by slowly slewing the Cassini spacecraft at right angles to the UVIS long slit. The images were limb-fit to improve the spacecraft…
High-precision spectral inversions: Determining what is important for the accurate definition of incident radiation boundary conditions
Heinzel, P.; Gunár, S.
Context. Spectral inversions are used to analyse spectroscopic observations with the aim of deriving the physical properties of the observed plasma, such as the kinetic temperature, density, pressure, degree of ionisation, or macroscopic velocities. One of the key factors ensuring the high precision of the derived plasma properties is having accur…