Search Publications
The Spitzer-IRAC/MIPS Extragalactic Survey (SIMES). II. Enhanced Nuclear Accretion Rate in Galaxy Groups at z ∼ 0.2
Berta, S.; Rodighiero, G.; Ciesla, L. +22 more
For a sample of star-forming galaxies in the redshift interval 0.15 < z < 0.3, we study how both the relative strength of the active galactic nucleus (AGN) infrared emission, compared to that due to the star formation (SF), and the numerical fraction of AGNs change as a function of the total stellar mass of the hosting galaxy group ({M}…
fcmaker: Automating the creation of ESO-compliant finding charts for Observing Blocks on p2
Vogt, F. P. A.
FCMAKER is a PYTHON module that creates astronomical finding charts for Observing Blocks (OBs) on the p2 web server from the European Southern Observatory (ESO). It provides users with the ability to automate the creation of ESO-compliant finding charts for Service Mode and/or Visitor Mode OBs at the Very Large Telescope (VLT). The design of the F…
Solar Cycle Observations of the Neon Abundance in the Sun-as-a-star
Warren, Harry P.; Brooks, David H.; Baker, Deborah +1 more
Properties of the Sun’s interior can be determined accurately from helioseismological measurements of solar oscillations. These measurements, however, are in conflict with photospheric elemental abundances derived using 3D hydrodynamic models of the solar atmosphere. This divergence of theory and helioseismology is known as the “solar modeling pro…
Gaia calibrated UV luminous stars in LAMOST
Bai, Yu; Wang, Song; Liu, Ji-Feng
We take advantage of Gaia Data Release 2 to present 275 and 1774 ultraviolet luminous stars in the far ultraviolet (FUV) and near ultraviolet (NUV), respectively. These stars exceed their expected values by 5σ with respect to over one million ultraviolet stars in the log g vs. T eff diagram. Galactic extinction is corrected with a 3D du…
Kinematics of Type II Cepheids of the Galactic Halo
Wallerstein, George; Farrell, Elizabeth M.
In a step toward understanding the origin of the Galactic Halo, we have reexamined Type II Cepheids (T2C) in the field with new input from the second data release (DR2) of Gaia. For 45 T2C with periods from 1 to 20 days, parallaxes, proper motions, and [Fe/H] values are available for 25 stars. Only five show [Fe/H] < -1.5, while the remaining s…
Gravitational wave effects on astrometric observables
Bini, Donato; Geralico, Andrea
Observational data from the European Space Agency astrometric mission Gaia determining the positions of celestial objects within an accuracy of a few microarcseconds will be soon fully available. Other satellite-based space missions are currently planned to significantly improve such precision in the next years. The data reduction process needs hi…
Cusp Current System: An Energy Source View
Yamauchi, M.; Slapak, R.
Widespread Shocks in the Nucleus of NGC 404 Revealed by Near-infrared Integral Field Spectroscopy
Armus, L.; Boehle, A.; Larkin, J. E. +1 more
We present high spatial resolution, integral field spectrograph (IFS) observations of the nearby low-ionization nuclear emission-line region (LINER) galaxy NGC 404 at 1.25 µm (J band) and 2.2 µm (K band) near-infrared (NIR) wavelengths. Although NGC 404 is thought to host an intermediate-mass black hole (BH) at its center, it has been …
ROSETTA: How to archive more than 10 years of mission
A'Hearn, M. F.; Besse, S.; Taylor, M. G. G. T. +10 more
The Rosetta spacecraft was launched in 2004 and, after several planetary and two asteroid fly-bys, arrived at comet 67P/Churyumov-Gerasimenko in August 2014. After escorting the comet for two years and executing its scientific observations, the mission ended on 30 September 2016 through a touch down on the comet surface. This paper describes how t…
MARSIS Observations of Field-Aligned Irregularities and Ducted Radio Propagation in the Martian Ionosphere
Gurnett, D. A.; Buchert, S.; Edberg, N. J. T. +7 more
Knowledge of Mars's ionosphere has been significantly advanced in recent years by observations from Mars Express and lately Mars Atmosphere and Volatile EvolutioN. A topic of particular interest are the interactions between the planet's ionospheric plasma and its highly structured crustal magnetic fields and how these lead to the redistribution of…