Search Publications
Average properties of the magnetic reconnection ion diffusion region in the Earth's magnetotail: The 2001-2005 Cluster observations and comparison with simulations
Eastwood, J. P.; Phan, T. D.; Øieroset, M. +1 more
Magnetic reconnection plays a key role in the circulation of plasma through the Earth's magnetosphere. As such, the Earth's magnetotail is an excellent natural laboratory for the study of reconnection and in particular the diffusion region. To address important questions concerning observational occurrence rates and average properties, the Cluster…
The host galaxies of core-collapse supernovae and gamma-ray bursts
Fruchter, A. S.; Levan, A. J.; Tanvir, N. R. +2 more
We present a comparative study of the galactic and small-scale environments of gamma-ray bursts (GRBs) and core-collapse supernovae (CCSNe). We use a sample of 34 GRB hosts at z < 1.2, and a comparison sample of 58 supernova hosts located within the Great Observatories Origins Deep Survey footprint. We fit template spectra to the available phot…
A three-dimensional asymmetric magnetopause model
Wang, Y. L.; Zhang, X. X.; Lin, R. L. +2 more
A new three-dimensional asymmetric magnetopause model has been developed for corrected GSM coordinates and parameterized by the solar wind dynamic and magnetic pressures (Pd + Pm), the interplanetary magnetic field (IMF) Bz, and the dipole tilt angle. On the basis of the magnetopause crossings from Geotail, IMP 8, …
Ultraviolet tails and trails in cluster galaxies: a sample of candidate gaseous stripping events in Coma
Hornschemeier, Ann E.; Hudson, Michael J.; Marzke, Ronald O. +10 more
We have used new deep observations of the Coma cluster from Galaxy Evolution Explorer to visually identify 13 star-forming galaxies with asymmetric morphologies in the ultraviolet (UV). Aided by wide-field optical broad-band and Hα imaging, we interpret the asymmetric features as being due to star formation within gas stripped from the galaxies by…
The Galaxy Luminosity Function During the Reionization Epoch
Shull, J. M.; Trenti, M.; Carollo, C. M. +5 more
The new Wide Field Camera 3/IR observations on the Hubble Ultra-Deep Field (HUDF) started investigating the properties of galaxies during the reionization epoch. To interpret these observations, we present a novel approach inspired by the conditional luminosity function method. We calibrate our model to observations at z = 6 and assume a non-evolv…
Lyα-emitting Galaxies at z = 2.1 in ECDF-S: Building Blocks of Typical Present-day Galaxies?
Blanc, Guillermo A.; Gronwall, Caryl; Gawiser, Eric +8 more
We discovered a sample of 250 Lyα emitting (LAE) galaxies at z ~= 2.1 in an ultra-deep 3727 Å narrow-band MUSYC image of the Extended Chandra Deep Field-South. The LAEs were selected to have rest-frame equivalent widths (EWs) >20 Å and emission-line fluxes F Lyα>2.0 × 10-17 erg cm-2 s-1, after care…
The Herschel Multi-Tiered Extragalactic Survey: source extraction and cross-identifications in confusion-dominated SPIRE images
Altieri, B.; Aussel, H.; Elbaz, D. +83 more
We present the cross-identification and source photometry techniques used to process Herschel SPIRE imaging taken as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES). Cross-identifications are performed in map-space so as to minimize source-blending effects. We make use of a combination of linear inversion and model selection techni…
Relativistic Lines and Reflection from the Inner Accretion Disks Around Neutron Stars
Miller, Jon M.; Cackett, Edward M.; Wijnands, Rudy +6 more
A number of neutron star low-mass X-ray binaries (LMXBs) have recently been discovered to show broad, asymmetric Fe K emission lines in their X-ray spectra. These lines are generally thought to be the most prominent part of a reflection spectrum, originating in the inner part of the accretion disk where strong relativistic effects can broaden emis…
Bulges of Nearby Galaxies with Spitzer: Scaling Relations in Pseudobulges and Classical Bulges
Drory, Niv; Fisher, David B.
We investigate scaling relations of bulges using bulge-disk decompositions at 3.6 µm and present bulge classifications for 173 E-Sd galaxies within 20 Mpc. Pseudobulges and classical bulges are identified using Sérsic index, Hubble Space Telescope morphology, and star formation activity (traced by 8 µm emission). In the near-IR pseudob…
UBV(RI)C JHK observations of Hipparcos-selected nearby stars
Kilkenny, D.; Marang, F.; Koen, C. +1 more
We present homogeneous, standardized UBV(RI)C photometry for over 700 nearby stars selected on the basis of Hipparcos parallaxes. Additionally, we list JHK photometry for about half of these stars, as well as L photometry for 86 of the brightest. A number of stars with peculiar colours or anomalous locations in various colour-magnitude …