Search Publications
Mapping the 12CO J = 1-0 and J = 2-1 emission in AGB and early post-AGB circumstellar envelopes. I. The COSAS program, first sample
Lindqvist, M.; Olofsson, H.; Grewing, M. +8 more
We present COSAS (CO Survey of late AGB Stars), a project to map and analyze the 12CO J = 1-0 and J = 2-1 line emission in a representative sample of circumstellar envelopes around AGB and post-AGB stars. The survey was undertaken with the aim of investigating small- and large-scale morphological and kinematical properties of the molecu…
A Twisted Flux Rope as the Magnetic Structure of a Filament in Active Region 10953 Observed by Hinode
Canou, A.; Amari, T.
The presence of twisted flux ropes (TFRs) in pre-eruptive/flaring magnetic configurations is of main interest for our understanding of the structure and dynamics of the solar corona. On the one hand, their presence is a key ingredient in several theoretical models for the magnetic support of material in filaments, or triggering of coronal mass eje…
The dust content of high-z submillimeter galaxies revealed by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +38 more
We use deep observations taken with the Photodetector Array Camera and Spectrometer (PACS), on board the Herschel satellite as part of the PACS evolutionary probe (PEP) guaranteed project along with submm ground-based observations to measure the dust mass of a sample of high-z submillimeter galaxies (SMGs). We investigate their dust content relati…
An Evolving View of Saturn’s Dynamic Rings
Clark, R. N.; Nicholson, P. D.; Kempf, S. +20 more
We review our understanding of Saturn’s rings after nearly 6 years of observations by the Cassini spacecraft. Saturn’s rings are composed mostly of water ice but also contain an undetermined reddish contaminant. The rings exhibit a range of structure across many spatial scales; some of this involves the interplay of the fluid nature and the self-g…
Powerful H2 Line Cooling in Stephan's Quintet. I. Mapping the Significant Cooling Pathways in Group-wide Shocks
Yun, M. S.; Boulanger, F.; Reach, W. T. +10 more
We present results from the mid-infrared spectral mapping of Stephan's Quintet using the Spitzer Space Telescope. A 1000 km s-1 collision (t col = 5 × 106 yr) has produced a group-wide shock, and for the first time the large-scale distribution of warm molecular hydrogen emission is revealed, as well as its close as…
A Displaced Supermassive Black Hole in M87
Batcheldor, D.; Axon, D. J.; Robinson, A. +2 more
Isophotal analysis of M87, using data from the Advanced Camera for Surveys, reveals a projected displacement of 6.8 ± 0.8 pc (~0farcs1) between the nuclear point source (presumed to be the location of the supermassive black hole, SMBH) and the photo-center of the galaxy. The displacement is along a position angle of 307° ± 17° and is consistent wi…
A direct limit on the turbulent velocity of the intracluster medium in the core of Abell 1835 from XMM-Newton
Fabian, A. C.; Sanders, J. S.; Smith, R. K. +1 more
We examine deep XMM-Newton Reflection Grating Spectrometer observations of the X-ray luminous galaxy cluster A1835. For the first time in a galaxy cluster, we place direct limits on turbulent broadening of the emission lines. This is possible because the coolest X-ray emitting gas in the cluster, which is responsible for the lines, occupies a smal…
Ultradeep KS Imaging in the GOODS-N
Wang, Wei-Hao; Cowie, Lennox L.; Barger, Amy J. +2 more
We present an ultradeep KS -band image that covers 0.5 × 0.5 deg2 centered on the Great Observatories Origins Deep Survey-North (GOODS-N). The image reaches a 5σ depth of K_{S,AB}=24.45 in the GOODS-N region, which is as deep as the GOODS-N Spitzer Infrared Array Camera (IRAC) 3.6 µm image. We present a new method of co…
Evolution of infrared luminosity functions of galaxies in the AKARI NEP-deep field. Revealing the cosmic star formation history hidden by dust
Le Floc'h, E.; Im, M.; Lee, H. M. +19 more
Aims: Dust-obscured star-formation increases with increasing intensity and increasing redshift. We aim to reveal the cosmic star-formation history obscured by dust using deep infrared observation with AKARI.
Methods: We constructed restframe 8 µm, 12 µm, and total infrared (TIR) luminosity functions (LFs) at 0.15 < z < …
Herschel-ATLAS: The dust energy balance in the edge-on spiral galaxy UGC 4754
Rodighiero, G.; de Zotti, G.; Herranz, D. +39 more
We use Herschel PACS and SPIRE observations of the edge-on spiral galaxy UGC 4754, taken as part of the H-ATLAS SDP observations, to investigate the dust energy balance in this galaxy. We build detailed SKIRT radiative models based on SDSS and UKIDSS maps and use these models to predict the far-infrared emission. We find that our radiative transfe…