Search Publications
An XMM-Newton Study of the Mixed-morphology Supernova Remnant W28 (G6.4-0.1)
Safi-Harb, Samar; Zhou, Ping; Chen, Yang +3 more
We have performed an XMM-Newton imaging and spectroscopic study of supernova remnant (SNR) W28, a prototype mixed-morphology or thermal composite SNR believed to be interacting with a molecular cloud. The observed hot X-ray emitting plasma is characterized by low metal abundances, showing no evidence of ejecta. The X-rays arising from the deformed…
CLASH-VLT: Constraints on the Dark Matter Equation of State from Accurate Measurements of Galaxy Cluster Mass Profiles
Donahue, Megan; Broadhurst, Tom; Kuchner, Ulrike +39 more
A pressureless scenario for the dark matter (DM) fluid is a widely adopted hypothesis, despite the absence of direct observational evidence. According to general relativity, the total mass-energy content of a system shapes the gravitational potential well, but different test particles perceive this potential in different ways depending on their pr…
Cassini multi-instrument assessment of Saturn's polar cap boundary
Gurnett, D. A.; Krupp, N.; Dougherty, M. K. +10 more
We present the first systematic investigation of the polar cap boundary in Saturn's high-latitude magnetosphere through a multi-instrument assessment of various Cassini in situ data sets gathered between 2006 and 2009. We identify 48 polar cap crossings where the polar cap boundary can be clearly observed in the step in upper cutoff of auroral his…
The ALHAMBRA survey: evolution of galaxy clustering since z ∼ 1
Cepa, J.; Infante, L.; Molino, A. +29 more
We study the clustering of galaxies as function of luminosity and redshift in the range 0.35 < z < 1.25 using data from the Advanced Large Homogeneous Area Medium-Band Redshift Astronomical (ALHAMBRA) survey. The ALHAMBRA data used in this work cover 2.38 deg2 in seven independent fields, after applying a detailed angular selectio…
On the fine structure of dipolarization fronts
Dandouras, I.; Walker, S. N.; Runov, A. +4 more
Measurements from the closely spaced Cluster spacecraft are used to study the structure of the magnetic and electric fields within the magnetic ramp of dipolarization fronts (DF) observed close to the neutral sheet and the midnight meridian (YGSM<3RE). The spacecraft separation was small enough (<300 km) to treat the ma…
Coronal Inflows during the Interval 1996-2014
Sheeley, N. R., Jr.; Wang, Y. -M.
We extend our previous counts of coronal inflows from the 5 yr interval 1996-2001 to the 18 yr interval 1996-2014. By comparing stackplots of these counts with similar stackplots of the source-surface magnetic field and its longitudinal gradient, we find that the inflows occur in long-lived streams with counting rates in excess of 18 inflows per d…
Constraints on a decomposed dark fluid with constant adiabatic sound speed by jointing the geometry test and growth rate after Planck data
Yang, Weiqiang; Xu, Lixin; Wang, Yuting +1 more
In this paper, a unified dark fluid with constant adiabatic sound speed is decomposed into cold dark matter interacting with vacuum energy. Based on a Markov-chain Monte Carlo method, we constrain this model by jointing the geometry and dynamical measurement. The geometry test includes cosmic microwave background radiation from Planck, baryon acou…
The UV Continuum of z > 1 Star-forming Galaxies in the Hubble Ultraviolet UltraDeep Field
Finkelstein, Steven L.; Grogin, Norman A.; Koekemoer, Anton M. +11 more
We estimate the UV continuum slope, β, for 923 galaxies in the range 1 < z < 8 in the Hubble Ultradeep Field (HUDF). These data include 460 galaxies at 1 < z < 2 down to an absolute magnitude M_UV= -14(∼ 0.006 L^*z=1; 0.02 L^*z=0), comparable to dwarf galaxies in the local universe. We combine deep HST/UVIS photom…
The structure of strongly tilted current sheets in the Earth magnetotail
Petrukovich, A. A.; Zelenyi, L. M.; Nakamura, R. +2 more
We investigate strongly tilted (in the y-z GSM plane) current sheets (CSs) in the Earth magnetotail using data from the Cluster mission. We analyze 29 CS crossings observed in 2001-2004. The characteristic current density, magnetic field at the CS boundary and the CS thickness of strongly tilted CSs are similar to those reported previously for hor…
The distant galaxy cluster XLSSJ022403.9-041328 on the LX–TX–M scaling relations using Chandra and XMM–Newton observations
Babyk, I.; Vavilova, I.
We present a very detailed analysis of Chandra and XMM–Newton observations of XLSSJ022403.9-041328 galaxy cluster of z=1, which was detected during the XMM-Newton Large Scale Structure survey. To define the "luminosity-temperature-mass", LX–TX–M, scaling relations we built temperature, surface brightness, density, and mass pr…