Search Publications
Magnetic fluctuations embedded in dipolarization inside geosynchronous orbit and their associated selective acceleration of O+ ions
Kistler, L. M.; Miyashita, Y.; Keika, K. +7 more
We study magnetic fluctuations embedded in dipolarizations in the inner magnetosphere (a geocentric distance of ≤6.6 RE) and their associated ion flux changes, using the Engineering Test Satellite VIII and Active Magnetospheric Particle Tracer Explorers/CCE satellites. We select seven events of dipolarization that occur during the main …
Firm detection of a cyclotron resonance feature with Suzaku in the X-ray spectrum of GRO J1008-57 during a giant outburst in 2012
Makishima, Kazuo; Sasano, Makoto; Mihara, Tatehiro +3 more
We report on the firm detection of a cyclotron resonance scattering feature (CRSF) in the X-ray spectrum of the Be X-ray binary pulsar, GRO J1008-57, achieved by the Suzaku Hard X-ray Detector during a giant outburst which was detected by the MAXI Gas Slit Camera in 2012 November. The Suzaku observation was carried out on 2012 November 20, outburs…
The Taurus Boundary of Stellar/Substellar (TBOSS) Survey. I. Far-IR disk emission measured with Herschel
Pinte, C.; Ménard, F.; Bouy, H. +4 more
With the PACS instrument on Herschel, 134 low mass members of the Taurus star-forming region spanning the M4-L0 spectral type range and covering the transition from low mass stars to brown dwarfs were observed. Combining the new Herschel results with other Herschel programs, a total of 150 of the 154 M4-L0 Taurus members have observations, and we …
Resolved Star Formation on Sub-galactic Scales in a Merger at z = 1.7
Rigby, Jane R.; Whitaker, Katherine E.; Brammer, Gabriel B. +4 more
We present a detailed analysis of Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) G141 grism spectroscopy for seven star-forming regions of the highly magnified lensed starburst galaxy RCSGA 032727-132609 at z = 1.704. We measure the spatial variations of the extinction in RCS0327 through the observed Hγ/Hβ emission line ratios, finding a …
The average 0.5-200 keV spectrum of local active galactic nuclei and a new determination of the 2-10 keV luminosity function at z ≈ 0
Ballantyne, D. R.
The broad-band X-ray spectra of active galactic nuclei (AGNs) contains information about the nuclear environment from Schwarzschild radii scales (where the primary power law is generated in a corona) to distances of ∼1 pc (where the distant reflector may be located). In addition, the average shape of the X-ray spectrum is an important input into X…
The Association of Solar Flares with Coronal Mass Ejections During the Extended Solar Minimum
Lemen, J. R.; Aschwanden, M. J.; Nitta, N. V. +3 more
We study the association of solar flares with coronal mass ejections (CMEs) during the deep, extended solar minimum of 2007 - 2009, using extreme-ultraviolet (EUV) and white-light (coronagraph) images from the Solar Terrestrial Relations Observatory (STEREO). Although all of the fast (v>900 km s−1), wide (θ>100∘) CMEs a…
Comparing supernova remnants around strongly magnetized and canonical pulsars
Rea, N.; Torres, D. F.; Martin, J. +1 more
The origin of the strong magnetic fields measured in magnetars is one of the main uncertainties in the neutron star field. On the other hand, the recent discovery of a large number of such strongly magnetized neutron stars is calling for more investigation on their formation. The first proposed model for the formation of such strong magnetic field…
Half-megasecond Chandra Spectral Imaging of the Hot Circumgalactic Nebula around Quasar Mrk 231
Maiolino, R.; Sturm, E.; Veilleux, S. +2 more
A deep 400 ks ACIS-S observation of the nearest quasar known, Mrk 231, is combined with archival 120 ks data to carry out the first ever spatially resolved spectral analysis of a hot X-ray-emitting circumgalactic nebula around a quasar. The 65 × 50 kpc X-ray nebula shares no resemblance with the tidal debris seen at optical wavelengths. One notabl…
Model-independent fit to Planck and BICEP2 data
Mena, Olga; Barranco, Laura; Boubekeur, Lotfi
Inflation is the leading theory to describe elegantly the initial conditions that led to structure formation in our Universe. In this paper, we present a novel phenomenological fit to the Planck, WMAP polarization (WP) and the BICEP2 data sets using an alternative parametrization. Instead of starting from inflationary potentials and computing the …
An X-ray and UV flare from the galaxy XMMSL1 J061927.1-655311
Read, A. M.; Esquej, P.; Komossa, S. +6 more
Aims: New high variability extragalactic sources may be identified by comparing the flux of sources seen in the XMM-Newton Slew Survey with detections and upper limits from the ROSAT All Sky Survey.
Methods: A detected flaring extragalactic source was monitored with Swift and XMM-Newton to track its temporal and spectral evolution. Optic…