Search Publications
Asteroid spin and shape properties from Gaia DR3 photometry
Mignard, F.; Tanga, P.; Cellino, A. +1 more
Context. The third data release of Gaia, in June 2022, included the first large sample of sparse photometric data for more than 150 000 Solar System objects (SSOs), mainly asteroids.
Aims: The SSO photometric data can be processed to derive information on the physical properties for a large number of objects, including spin properties, surfac…
Modelling JWST mid-infrared counts: excellent consistency with models derived for IRAS, ISO, and Spitzer
Rowan-Robinson, Michael
Models derived in 2009 to fit mid-infrared (8-24 micron) source counts from the IRAS, ISO, and Spitzer missions, provide an excellent fit to deep counts with JWST, demonstrating that the evolution of dusty star-forming galaxies is well understood. The evolution of dust in galaxies at high redshifts is discussed and a simple prescription is propose…
Yellow hypergiant V509 Cas: Stable in the `yellow void'
Kolka, I.; Kasikov, A.; Aret, A. +2 more
Context. The yellow hypergiant star
Likelihood-based Jump Detection and Cosmic Ray Rejection for Detectors Read Out Up-the-ramp
Brandt, Timothy D.
This paper implements likelihood-based jump detection for detectors read out up-the-ramp, using the entire set of reads to compute likelihoods. The approach compares the χ 2 value of a fit with and without a jump for every possible jump location. I show that this approach can be substantially more sensitive than one that only uses the d…
Infrared Properties of Carbon Stars in Our Galaxy
Suh, Kyung-Won
We explore the characteristics of carbon stars within our Galaxy through a comprehensive analysis of observational data spanning visual and infrared (IR) bands. Leveraging data sets from IRAS, the Infrared Space Observatory, Akari, the Midcourse Space Experiment, the Two Micron All Sky Survey, the Wide-field Infrared Survey Explorer (WISE), Gaia D…
Sublimation of volatiles from H2O:CO2 bulk ices in the context of comet 67P/Churyumov-Gerasimenko. II. Noble gases
Wurz, P.; Altwegg, K.; Rubin, M. +6 more
Context. The ROSINA instrument on board the Rosetta spacecraft measured, among others, the outgassing of noble gases from comet 67P/Churyumov-Gerasimenko. The interpretation of this dataset and unravelling underlying desorption mechanisms requires detailed laboratory studies.
Aims: We aim to improve our understanding of the desorption pattern…
Correlating Intrinsic Stellar Parameters with Mg II Self-reversal Depths
Peacock, Sarah; Redfield, Seth; Youngblood, Allison +2 more
The Mg II h&k emission lines (2803, 2796 Å) are a useful tool for understanding stellar chromospheres and transition regions due to their intrinsic brightness, relatively low interstellar medium (ISM) absorption interference, and abundance of archival spectra available. Similar to other optically thick chromospheric emission lines such as H I Lyα,…
A star under multiple influences. Magnetic activity in V815 Her, a compact 2+2 hierarchical system
Strassmeier, K. G.; Weber, M.; Granzer, T. +7 more
Context. Close binaries with magnetically active components are astrophysical laboratories for studying the effects of binarity on activity. Of particular interest are binary and multiple star systems that contain a solar-type active component with an internal structure similar to the Sun, allowing us to study how the dynamo of a solar-type star w…
Gone with the Molecular Wind: Photoevaporation in the Compact Dust Disk around CX Tau
Cleeves, L. Ilsedore; Williams, Jonathan P.; Pontoppidan, Klaus M. +5 more
We present Keck NIRSPEC+AO high-resolution (R ∼ 25,000), mid-infrared (M-band: 4.6–5.2 µm) spectra of the protoplanetary disk CX Tau. CX Tau provides an ideal laboratory to study inner disk chemistry in a disk where the signs of radial drift of pebbles are present in the form of a compact mm dust disk and extended gas disk. Our data covers m…
A study of two young multipolar planetary nebulae: Hen 2-73 and Hen 2-96
Wen, Shibo; Wang, Yong-Zhi; Hsia, Chih-Hao +4 more
We perform an infrared (IR) spectral and visible morphological study of two young planetary nebulae (YPNe) Hen 2-73 and Hen 2-96 using archival Spitzer Space Telescope and Hubble Space Telescope (HST) observations to understand their dust properties and nebular structures. High-resolution HST images of these nebulae show several bipolar lobes and …