Search Publications
Far-Infrared Characterization of an Ultraluminous Starburst Associated with a Massively Accreting Black Hole at z=1.15
Elbaz, D.; Le Floc'h, E.; Maiolino, R. +24 more
As part of the All-Wavelength Extended Groth Strip International Survey (AEGIS), we describe the panchromatic characterization of an X-ray-luminous active galactic nucleus (AGN) in a merging galaxy at z=1.15. This object is detected at infrared (8, 24, 70, and 160 µm), submillimeter (850 µm), and radio wavelengths, from which we derive…
Supernova Remnants in the Magellanic Clouds. IX. Multiwavelength Analysis of the Physical Structure of N49
Gruendl, R. A.; Chu, Y. -H.; Bilikova, J. +2 more
We present a multiwavelength analysis of the supernova remnant N49 in the Large Magellanic Cloud. Using high-resolution Hubble Space Telescope WFPC2 images of Hα, [S II], and [O III] emission, we study the morphology of the remnant and calculate the rms electron densities in different regions. We detect an offset of [O III] and Hα emission peaks o…
Spectral properties of X-ray bright variable sources in the Taurus molecular cloud
Audard, M.; Güdel, M.; Briggs, K. R. +7 more
Aims:We analyze 19 bright variable X-ray sources detected in the XMM-Newton Extended Survey of the Taurus Molecular Cloud (XEST), to characterize the variations with time of their coronal properties and to derive information on the X-ray emitting structures.
Methods: We performed time-resolved spectroscopy of the EPIC PN and MOS spectra of the…
XMM-Newton observations of EF Eridani: the textbook example of low-accretion rate polars
Koester, D.; Schwope, A. D.; Vogel, J. +1 more
Archival X-ray observations of EF Eridani obtained in a low state revealed distinct X-ray detections at a luminosity LX ≃ 2 × 1029 erg s-1, three orders of magnitude below its high state value. The plasma temperature was found to be as low as kT loa 2 keV, a factor 10 below the high state. The X-ray/UV/IR spectral …
X-ray broad-band study of the symbiotic X-ray binary 4U 1954+31
Cusumano, G.; Palazzi, E.; Frontera, F. +5 more
We present results of several pointed X-ray broad band observations of the “symbiotic X-ray binary” 4U 1954+31 performed with the satellites BeppoSAX, EXOSAT, ROSAT, RXTE and Swift between October 1983 and April 2006. We also studied the RXTE ASM data over a period of more than 10 years, from January 1996 to October 2006. Light curves of all point…
Sizes of Confirmed Globular Clusters in NGC 5128: A Wide-Field High-Resolution Study
Woodley, Kristin A.; Gómez, Matías
Using Magellan/IMACS images covering a 1.2 × 1.2 deg2 field of view with seeing of 0.4"-0.6", we have applied convolution techniques to analyze the light distribution of 364 confirmed globular clusters in the field of NGC 5128 and to obtain their structural parameters. Combining these parameters with existing Washington photometry from …
The exosphere of Titan and its interaction with the kronian magnetosphere: MIMI observations and modeling
Krupp, N.; Dandouras, I.; Garnier, P. +7 more
Titan's nitrogen-rich atmosphere is directly bombarded by energetic ions, due to its lack of a significant intrinsic magnetic field. Singly charged energetic ions from Saturn magnetosphere undergo charge exchange collisions with neutral atoms in Titan's exosphere, being transformed into energetic neutral atoms (ENAs). The ion and neutral camera (I…
Ion Temperatures in the Quiet Solar Corona
Landi, E.
We measure the upper and lower limits of the temperatures Ti for a number of ions observed in the quiescent solar corona from 1996 to 2000, in order to compare with the measured electron temperature Te and test the assumption Ti=Te commonly adopted to measure the plasma nonthermal velocity vnth
Spectroscopic follow-up of a cluster candidate at z = 1.45
Simpson, Chris; Rawlings, Steve; Jarvis, Matt +7 more
We have obtained deep optical spectroscopic data of the highest-redshift cluster candidate (z ~ 1.4, CVB13) selected by Van Breukelen et al. in a photometric optical/infrared catalogue of the Subaru XMM-Newton Deep Field. The data, which comprise 104 targeted galaxies, were taken with the DEep Imaging Multi-Object Spectrograph on the Keck 2 telesc…
A NICMOS search for obscured supernovae in starburst galaxies
Maiolino, R.; Della Valle, M.; Cresci, G. +1 more
The detection of obscured supernovae (SNe) in near-infrared monitoring campaigns of starburst galaxies has shown that a significant fraction of SNe is missed by optical surveys. However, the number of SNe detected in ground-based near-IR observations is still significantly lower than the number of SNe extrapolated from the FIR luminosity of the ho…