Search Publications
Missions
Journals
Publication Years
A Study of the Merger History of the Galaxy Group HCG 62 Based on X-Ray Observations and Smoothed Particle Hydrodynamic Simulations
Hu, Dan; Xu, Haiguang; Zhu, Zhenghao +9 more
We chose the bright compact group HCG 62, which has been found to exhibit both excess X-ray emission and high Fe abundance to the southwest of its core, as an example to study the impact of mergers on chemical enrichment in the intragroup medium. We first reanalyze the high-quality Chandra and XMM-Newton archive data to search for evidence of addi…
Inertia parameter statistics of an uncertain small body shape
Bercovici, Benjamin; McMahon, Jay W.
This paper proposes an analytical formulation of the inertia parameters of Bezier shapes of arbitrary order. Bezier shapes can represent classical polyhedra as well as higher-order surface elements within the same framework. This formulation is linearized so as to yield the expressions of the first variation in the inertia properties of interest. …
Quasars Have Fewer Close Companions than Normal Galaxies
Fan, Xiaohui; McGreer, Ian D.; Huang, Yun-Hsin +2 more
We investigate the distribution of companion galaxies around quasars using Hubble Space Telescope (HST) Advanced Camera for Surveys Wide Field Camera (ACS/WFC) archival images. Our master sample contains 532 quasars that have been observed by HST ACS/WFC, spanning a wide range of luminosity (-31 < M i (z = 2) < -23) and redshift …
The influence of dark matter halo on the stellar stream asymmetry via dynamical friction
Kipper, Rain; Tenjes, Peeter; Tuvikene, Taavi +2 more
We study the effect of dynamical friction on globular clusters (GCs) and on the stars evaporated from the GCs (stellar streams) moving in the Galactic halo. Due to dynamical friction, the position of a GC as a stream progenitor starts to shift with respect to its original position in the reference frame of initial GC orbit. Therefore the stars tha…
Spectrophotometric Redshifts for z ∼ 1 Galaxies and Predictions for Number Densities with WFIRST and Euclid
Hathi, Nimish P.; Cohen, Seth; Windhorst, Rogier A. +3 more
We investigate the accuracy of 4000 Å/Balmer-break based redshifts by combining Hubble Space Telescope (HST) grism data with photometry. The grism spectra are from the Probing Evolution And Reionization Spectroscopically survey with HST using the G800L grism on the Advanced Camera for Surveys. The photometric data come from a compilation by the 3D…
Variation of mass accretion rate on to the white dwarf in the dwarf nova VW Hyi in quiescence
Ishida, Manabu; Hayashi, Takayuki; Nakaniwa, Nozomi +1 more
We have analysed a series of Suzaku data and one data set of XMM-Newton of the SU UMa type dwarf nova VW Hyi in optical quiescence. The observed spectra in the 0.2-10 keV band are moderately well represented by multitemperature thermal plasma emission models with a maximum temperature of 5-9 keV and bolometric luminosity of (2.4-5.2) × 1030
An uppermost haze layer above 100 km found over Venus by the SOIR instrument onboard Venus Express
Vandaele, Ann Carine; Robert, Séverine; Mahieux, Arnaud +3 more
The Solar Occultation in the InfraRed (SOIR) instrument onboard Venus Express was designed to measure the Venusian atmospheric transmission at high altitudes (65–220 km) in the infrared range (2.2–4.3 µm) with a high spectral resolution. In this work, we investigate the optical properties of Venus's haze layer above 90 km using SOIR solar oc…
A Persistent, Large-Scale, and Ordered Electrodynamic Connection Between Saturn and Its Main Rings
Gurnett, D. A.; Dougherty, M. K.; Hospodarsky, G. B. +8 more
Auroral hiss emissions are ubiquitous in planetary magnetospheres, particularly in regions where electric current systems are present. They are generally diagnostic of electrodynamic coupling between conductive bodies, thus making auroral and moon-connected magnetic field lines prime locations for their detection. However, the role of Saturn's rin…
A New Mass Determination of (349) Dembowska with Close Encounters
Fu, Yanning; Yuan, Ye; Li, Fan
(349) Dembowska is a big R-type main-belt asteroid. A new and more precise determination of its mass, M, is presented. The high precision is achieved, in particular, using our generally applied criterion of selecting model parameters. This criterion takes into account the sensitivity to M of the available observables, i.e., the position of another…
Infrared Galaxies in the Field of the Massive Cluster Abell S1063: Discovery of a Luminous Kiloparsec-sized H II Region in a Gravitationally Lensed Infrared-luminous Galaxy at z = 0.6
Richard, Johan; Weiner, Benjamin; Egami, Eiichi +10 more
Using the Spitzer Space Telescope and Herschel Space Observatory, we have conducted a survey of IR galaxies in the field of the galaxy cluster AS1063 at z = 0.347, which is one of the most massive clusters known and a target of the Hubble Space Telescope (HST) Cluster Lensing and Supernova Survey with Hubble and the Frontier Field surveys. The Spi…