Results 11 to 20 of about 7,698 (293)
Odessa Astronomical Publications, 2016 We show that, contrary to simple predictions, most AGNs show at best only a small increase of lags in the J, H, K, and L bands with increasing wavelength.
V. L. Oknyansky +2 more
doaj +3 more sources
CU Comae: a new field double-mode RR Lyrae, the most metal poor discovered to date [PDF]
, 2000 We report the discovery of a new double-mode RR Lyrae variable (RRd) in the field of our Galaxy: CU Comae. CU Comae is the sixth such RRd identified to date and is the most metal-poor RRd ever detected.
A. Bragaglia +22 more
core +3 more sources
Direct Simulation Monte Carlo Modeling of Ammonia in Comet C/2014 Q2 (Lovejoy)
The Astronomical Journal, 2023 Ammonia (NH _3 ), likely the most abundant nitrogen-bearing molecule in cometary ices followed by hydrogen cyanide, is believed to be stored in the nucleus predominantly as a parent ice.
Hideyo Kawakita +7 more
doaj +1 more source
The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 Comae [PDF]
, 2016 Context: When crossing the Hertzsprung gap, intermediate-mass stars develop a convective envelope. Fast rotators on the main sequence, or Ap star descendants, are expected to become magnetic active subgiants during this evolutionary phase.
Aurière, M. +5 more
core +2 more sources
MIR Spectra and Analysis of Jovian Trojan Asteroids
The Planetary Science Journal, 2023 Jovian Trojan asteroids make up a large group of primitive bodies that populate Jupiter's L4 and L5 Lagrange points. The Trojans’ dynamics and composition carry insight into the formation mechanisms that shaped our solar system. Mid-infrared (MIR; 5–35 μ
Audrey C. Martin, Joshua P. Emery
doaj +1 more source
Gamma-Ray Observational Properties of TeV-Detected Blazars [PDF]
, 2013 The synergy between the Fermi-LAT and ground-based Cherenkov telescope arrays gives us the opportunity for the first time to characterize the high-energy emission from blazars over 5 decades in energy, from 100 MeV to 10 TeV.
Boettcher, M. +3 more
core +3 more sources
The Astronomical Journal, 2023 We report production rates of H _2 O and nine trace molecules (C _2 H _6 , CH _4 , H _2 CO, CH _3 OH, HCN, NH _3 , C _2 H _2 , OCS, and CO) in long-period comet C/2020 S3 (Erasmus) using the high-resolution, cross-dispersed infrared spectrograph (iSHELL)
Chemeda Ejeta +11 more
doaj +1 more source
Organic synthesis applied to space sciences
EPJ Web of Conferences, 2012 About 160 molecules have been detected in the interstellar medium, the comae and the atmospheres of planets. The presence of these compounds leads to imagine a chemistry of these media to explain the formation of these species and to predict the possible
Guillemin J.-C.
doaj +1 more source
Comet P/2021 HS (PANSTARRS) and the Challenge of Detecting Low-activity Comets
The Planetary Science Journal, 2023 Jupiter-family comet (JFC) P/2021 HS (PANSTARRS) only exhibits a coma within a few weeks of its perihelion passage at 0.8 au, which is atypical for a comet.
Quanzhi Ye +10 more
doaj +1 more source
Absorption Efficiencies of Forsterite. I: DDA Explorations in Grain Shape and Size [PDF]
, 2013 We compute the absorption efficiency (Qabs) of forsterite using the discrete dipole approximation (DDA) in order to identify and describe what characteristics of crystal grain shape and size are important to the shape, peak location, and relative ...
Harker, David E. +5 more
core +3 more sources