Search Publications
Revised upper limits for abundances of NH3, HCN and HC3N in the Martian atmosphere
Montmessin, F.; Korablev, O.; Fedorova, A. A. +7 more
The Atmospheric Chemistry Suite (ACS) onboard the ExoMars Trace Gas Orbiter (TGO) spacecraft has been studying Mars' atmosphere since 2018. The sensitivity of the middle infrared channel (MIR) allows it to address many ardent topics and it is capable of improving and establishing upper limits for many trace species. In this work we present analysi…
Euclid preparation: XLVI. The near-infrared background dipole experiment with Euclid
Altieri, B.; Cimatti, A.; Baccigalupi, C. +217 more
Verifying the fully kinematic nature of the long-known cosmic microwave background (CMB) dipole is of fundamental importance in cosmology. In the standard cosmological model with the Friedman–Lemaitre–Robertson–Walker (FLRW) metric from the inflationary expansion, the CMB dipole should be entirely kinematic. Any non-kinematic CMB dipole component …
Novel quantitative methods to enable multispectral identification of high-purity water ice exposures on Mars using High Resolution Imaging Science Experiment (HiRISE) images
Munaretto, G.; Dundas, C. M.; Seelos, F. P. +8 more
Reliable detection and characterization of water ice on the Martian surface is pivotal to not only understand its present and past climate, but to also provide valuable information on in-situ resource availability and distribution for future human exploration missions. Ice-rich features are currently identified with visible/near-IR (VNIR), thermal…
Exploring the dynamical evolution of Cepheid multiplicity in star clusters and its implications for B-star multiplicity at birth
Anderson, Richard I.; Kroupa, Pavel; Dinnbier, František
Context. Classical Cepheid variable stars provide a unique probe of binary evolution in intermediate-mass stars over the course of several tens to hundreds of Myr. In addition, understanding binary evolution with the inclusion of cluster dynamics is desirable for obtaining a more complete picture of these stars, especially as they play a vital rol…
The Densities in Diffuse and Translucent Molecular Clouds: Estimates from Observations of C2 and from Three-dimensional Extinction Maps
Caselli, Paola; Welty, Daniel E.; Edenhofer, Gordian +7 more
Newly computed collisional rate coefficients for the excitation of C2 in collisions with H2, presented recently by Najar & Kalugina, are significantly larger than the values adopted previously in models for the excitation of the C2 molecule, a widely used probe of the interstellar gas density. With these new ra…
Dynamics in Star-forming Cores (DiSCo): project overview and the first look towards the B1 and NGC 1333 regions in Perseus
Friesen, Rachel; Li, Zhi-Yun; Pineda, Jaime E. +13 more
The internal velocity structure within dense gaseous cores plays a crucial role in providing the initial conditions for star formation in molecular clouds. However, the kinematic properties of dense gas at core scales (~0.01-0.1 pc) has not been extensively characterized because of instrument limitations until the unique capabilities of GBT-Argus …
Studying binary systems in Omega Centauri with MUSE - I. Detection of spectroscopic binaries
Dreizler, S.; Saracino, S.; Latour, M. +6 more
NGC 5139 (
First determination of the angular dependence of rise and decay times of solar radio bursts using multi-spacecraft observations
Maksimovic, Milan; Kontar, Eduard P.; Chen, Xingyao +3 more
A large arsenal of space-based and ground-based instruments is dedicated to the observation of radio emissions, whether they originate within our solar system or not. Radio photons interact with anisotropic density fluctuations in the heliosphere which can alter their trajectory and influence the properties that are deduced from observations. This…
The X-ray enhancements of radio-loud quasars at high redshift: new results at z = 4-7
Brandt, W. N.; Garmire, Gordon P.; Xue, Yongquan +4 more
Highly radio-loud quasars (HRLQs; log R > 2.5) at z ≳ 4 show apparent enhanced X-ray emission compared to matched HRLQs at lower redshifts, perhaps due to a redshift-dependent fractional contribution to the X-ray luminosity from inverse-Compton scattering of cosmic microwave background photons (IC/CMB). Using new Chandra observations and archiv…
Vortex Fiber Nulling for Exoplanet Observations: First Direct Detection of M Dwarf Companions around HIP 21543, HIP 94666, and HIP 50319
Monnier, John D.; Schaefer, Gail H.; Lanthermann, Cyprien +35 more
Vortex fiber nulling (VFN) is a technique for detecting and characterizing faint companions at small separations from their host star. A near-infrared (∼2.3 µm) VFN demonstrator mode was deployed on the Keck Planet Imager and Characterizer (KPIC) instrument at the Keck Observatory and presented earlier. In this Letter, we present the first V…