Search Publications
Resolving the hydrostatic mass profiles of galaxy clusters at z ∼ 1 with XMM-Newton and Chandra
Arnaud, M.; Pratt, G. W.; Bartalucci, I. +1 more
We present a detailed study of the integrated total hydrostatic mass profiles of the five most massive M500SZ < 5 × 1014 M⊙ galaxy clusters selected at z ∼ 1 via the Sunyaev-Zel'dovich effect. These objects represent an ideal laboratory to test structure formation models where the primary driver is gr…
The Number Density Evolution of Extreme Emission Line Galaxies in 3D-HST: Results from a Novel Automated Line Search Technique for Slitless Spectroscopy
Maseda, Michael V.; Franx, Marijn; van der Wel, Arjen +6 more
The multiplexing capability of slitless spectroscopy is a powerful asset in creating large spectroscopic data sets, but issues such as spectral confusion make the interpretation of the data challenging. Here we present a new method to search for emission lines in the slitless spectroscopic data from the 3D-HST survey utilizing the Wide-Field Camer…
MARSIS Observations of the Martian Nightside Ionosphere During the September 2017 Solar Event
Gurnett, D. A.; Halekas, J. S.; Kopf, A. J. +5 more
We present topside ionospheric sounding on the nightside of Mars during the September 2017 solar event by Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) on board Mars Express along with complementary dayside observations from Mars Atmosphere and Volatile EvolutioN (MAVEN). The MARSIS and MAVEN observations during the event sug…
The X-ray catalog of spectroscopically identified Galactic O stars. Investigating the dependence of X-ray luminosity on stellar and wind parameters
Oskinova, L. M.; Nebot Gómez-Morán, A.
The X-ray emission of O-type stars was first discovered in the early days of the Einstein satellite. Since then many different surveys have confirmed that the ratio of X-ray to bolometric luminosity in O-type stars is roughly constant, but there is a paucity of studies that account for detailed information on spectral and wind properties of O-star…
Milky Way metallicity gradient from Gaia DR2 F/1O double-mode Cepheids
Kovtyukh, V.; Lemasle, B.; Kniazev, A. +8 more
Context. The ratio of the first overtone (1O)/fundamental (F) periods of mixed-mode Cepheids that pulsate simultaneously in these two modes (F/1O) is metallicity-dependent. It can therefore be used to characterize the systems that host such variable stars.
Aims: We want to take advantage of the F/1O double-mode Cepheids listed in the Gaia Dat…
Probing the structure of the gas in the Milky Way through X-ray high-resolution spectroscopy
Churazov, Eugene; Gatuzz, Efraín
We have developed a new X-ray absorption model, called IONeq, which computes the optical depth τ(E) simultaneously for ions of all abundant elements, assuming ionization equilibrium and taking into account turbulent broadening. We use this model to analyse the interstellar medium (ISM) absorption features in the Milky Way for a sample of 18 Galact…
Icy Saturnian satellites: Disk-integrated UV-IR characteristics and links to exogenic processes
Hendrix, Amanda R.; Filacchione, Gianrico; Schenk, Paul +2 more
Combined Cassini observations obtained at similar observing geometries in the ultraviolet through infrared spectral range, along with additional ultraviolet (UV) data from Hubble Space Telescope where available, are used to study system-wide trends in spectral albedos of the inner icy Saturnian satellites (Mimas, Enceladus, Tethys, Dione, Rhea). W…
Cornering the P l a n c k Alens tension with future CMB data
Di Valentino, Eleonora; Melchiorri, Alessandro; Renzi, Fabrizio
The precise measurements of cosmic microwave background (CMB) anisotropy angular power spectra made by the Planck satellite show an anomalous value for the lensing amplitude, defined by the parameter Alens, at about 2 standard deviations (2.6 standard deviations when cosmic shear data are included). Moreover, considering Alens
First Data Release of the All-sky NOAO Source Catalog
Nidever, David L.; Olsen, Knut; Dey, Arjun +6 more
Most of the sky has been imaged with NOAO’s telescopes from both hemispheres. While the large majority of these data were obtained for PI-led projects and almost all of the images are publicly available, only a small fraction have been released to the community via well-calibrated and easily accessible catalogs. We are remedying this by creating a…
The Gaia-ESO Survey: Churning through the Milky Way
Gilmore, G.; Bayo, A.; Recio-Blanco, A. +29 more
Context. There have been conflicting results with respect to the extent that radial migration has played in the evolution of the Galaxy. Additionally, observations of the solar neighborhood have shown evidence of a merger in the past history of the Milky Way that drives enhanced radial migration.
Aims: We attempt to determine the relative fra…