Search Publications
Radio Disappearance of the Magnetar XTE J1810-197 and Continued X-ray Timing
Camilo, F.; Ransom, S. M.; Johnston, S. +6 more
We report on timing, flux density, and polarimetric observations of the transient magnetar and 5.54 s radio pulsar XTE J1810-197 using the Green Bank, Nançay, and Parkes radio telescopes beginning in early 2006, until its sudden disappearance as a radio source in late 2008. Repeated observations through 2016 have not detected radio pulsations agai…
Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function
Paolillo, M.; Middei, R.; Vagnetti, F. +2 more
Context. Most investigations of the X-ray variability of active galactic nuclei (AGN) have been concentrated on the detailed analyses of individual, nearby sources. A relatively small number of studies have treated the ensemble behaviour of the more general AGN population in wider regions of the luminosity-redshift plane.
Aims: We want to det…
Weak-lensing mass calibration of the Atacama Cosmology Telescope equatorial Sunyaev-Zeldovich cluster sample with the Canada-France-Hawaii telescope stripe 82 survey
Bond, J. R.; Calabrese, E.; Huffenberger, K. M. +39 more
Mass calibration uncertainty is the largest systematic effect for using clusters of galaxies to constrain cosmological parameters. We present weak lensing mass measurements from the Canada-France-Hawaii Telescope Stripe 82 Survey for galaxy clusters selected through their high signal-to-noise thermal Sunyaev-Zeldovich (tSZ) signal measured with th…
The inner magnetosphere ion composition and local time distribution over a solar cycle
Kistler, L. M.; Mouikis, C. G.
Using the Cluster/Composition and Distribution Function (CODIF) analyzer data set from 2001 to 2013, a full solar cycle, we determine the ion distributions for H+, He+, and O+ in the inner magnetosphere (L < 12) over the energy range 40 eV to 40 keV as a function magnetic local time, solar EUV (F10.7)…
Suzaku Observations of Moderately Obscured (Compton-thin) Active Galactic Nuclei Selected by Swift/BAT Hard X-ray Survey
Ueda, Yoshihiro; Kawamuro, Taiki; Ricci, Claudio +2 more
We report the results obtained by a systematic, broadband (0.5-150 keV) X-ray spectral analysis of moderately obscured (Compton-thin, 22≤slant {log}{N}{{H}}< 24) active galactic nuclei (AGNs) observed with Suzaku and Swift/Burst Alert Telescope (BAT). Our sample consists of 45 local AGNs at z< 0.1 with {log}{L}14-195{keV
Dust particle flux and size distribution in the coma of 67P/Churyumov-Gerasimenko measured in situ by the COSIMA instrument on board Rosetta
Altobelli, Nicolas; Langevin, Yves; Fischer, Henning +14 more
Context. The COmetary Secondary Ion Mass Analyzer (COSIMA) on board Rosetta is dedicated to the collection and compositional analysis of the dust particles in the coma of 67P/Churyumov-Gerasimenko (67P).
Aims: Investigation of the physical properties of the dust particles collected along the comet trajectory around the Sun starting at a helio…
A robust measurement of the mass outflow rate of the galactic outflow from NGC 6090
Chisholm, John; Leitherer, Claus; Tremonti Christy, A. +1 more
To evaluate the impact of stellar feedback, it is critical to estimate the mass outflow rates of galaxies. Past estimates have been plagued by uncertain assumptions about the outflow geometry, metallicity, and ionization fraction. Here we use Hubble Space Telescope ultraviolet spectroscopic observations of the nearby starburst NGC 6090 to demonstr…
Catalog of equatorial coordinates and B-magnitudes of stars of the FON project
Andruk, V. M.; Pakuliak, L. K.; Golovnia, V. V. +4 more
The catalog of equatorial coordinates α and δ and B-magnitudes of stars of the northern sky (from–4° to +90°) was created as a part of the FON project at the Main Astronomical Observatory of the National Academy of Sciences of Ukraine. The data accumulated in the Joint Digital Archive of the Ukrainian Virtual Observatory were used. The total numbe…
Determining Ages of APOGEE Giants with Known Distances
Bovy, Jo; Majewski, Steven R.; Feuillet, Diane K. +4 more
We present a sample of 705 local giant stars observed using the New Mexico State University 1 m telescope with the Sloan Digital Sky Survey-III/Apache Point Observatory Galactic Evolution Experiment (APOGEE) spectrograph, for which we estimate stellar ages and the local star formation history (SFH). The high-resolution (R ∼ 22,500), near infrared …
Tracing extended low-velocity shocks through SiO emission. Case study of the W43-MM1 ridge
Hill, T.; Schneider, N.; Maury, A. +8 more
Aims: Previous literature suggests that the densest structures in the interstellar medium form through colliding flows, but patent evidence of this process is still missing. Recent literature proposes using SiO line emission to trace low-velocity shocks associated with cloud formation through collision. In this paper we investigate the bright…