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XMM-Newton observations of the dwarf nova YZ Cnc in quiescence
Ramsay, G.; Hakala, P.; Wheatley, P. +2 more
We present results from the XMM-Newton observations of the dwarf nova YZ Cnc in a quiescent state. We have performed a detailed time series analysis of the resulting light curves. Unusually, we do not detect any orbital modulation in the UV, with only marginal evidence for X-ray modulation on this period. Although there are peaks in the X-ray peri…
Ionospheric plasma density structures associated with magnetopause motion: a case study using the Cluster spacecraft and the EISCAT Svalbard Radar
Pitout, F.; Lucek, E.; Escoubet, C.
Available from http://www.copernicus.org/site/EGU/annales/22/7/2369.htm?FrameEngine=false;
The nuclear radio-optical properties of intermediate-redshift FR II radio galaxies and quasars
Macchetto, F. D.; Capetti, A.; Chiaberge, M. +1 more
We extend the study of the nuclei of 3CR objects as seen with the HST to higher-redshift FR II radio sources (0.4<z<0.6). Our results reflect what has been found for FR II of lower redshift. The position of the nuclei in the plane formed by optical and radio luminosities is related to their optical spectral classification: the nuclei of both…
Mid- and Far-Infrared Infrared Space Observatory Limits on Dust Disks around Millisecond Pulsars
Lazio, T. Joseph W.; Fischer, J.
We report 60 and 90 µm observations of seven millisecond pulsars with the Infrared Space Observatory. The pulsar PSR B1257+12 is orbited by three planets, and other millisecond pulsars may be orbited by dust disks that represent planets that failed to form or their residue. We do not detect any infrared emission from the seven pulsars in our…
A spectral analysis of the periodicity hypothesis in cratering records
Yabushita, Shin
Analysis is made of cratering records, whereby not only the crater ages, but also the sizes can be naturally taken into account. The method adopted is the periodogram analysis first discussed by Lomb. From the crater data based on Grieve's compilation, a period can be derived when a statistical weight of a crater is taken proportional to the size …
Unveiling SU Aurigae in the Near-Infrared: New High Spatial Resolution Results Using Adaptive Optics
Ge, Jian; Chakraborty, Abhijit
We present new results on the circumstellar nebulosity around SU Aurigae, a T Tauri star of about 2 Msolar and 5 Myr old at 152 pc in the J, H, and K bands using high-resolution adaptive optics imaging (0.30") with the Penn State Near-IR Imager and Spectrograph at the 100 inch (2.5 m) Mount Wilson telescope. A comparison with Hubble Spa…
ISOPHOT 95 µm observations in the Lockman Hole. The catalogue and an assessment of the source counts
Rodighiero, G.; Franceschini, A.
We report results from a new analysis of a deep 95 µm imaging survey with ISOPHOT on board the Infrared Space Observatory, over a ∼1 deg2 area within the Lockman Hole, which extends the statistics of our previous study (Rodighiero et al. \cite{Rodighiero03}). Within the survey area we detect sixty-four sources with S/N>3 (rough…
Far Ultraviolet Spectroscopic Explorer Spectroscopy of Absorption and Emission Lines from the Narrow-Line Seyfert 1 Galaxy NGC 4051
Brandt, W. N.; Kaspi, Shai; Elvis, Martin +2 more
We present three Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the narrow-line Seyfert 1 galaxy NGC 4051. The most prominent features in the far-ultraviolet (FUV) spectrum are the O VI emission and absorption lines and the H I Lyman series absorption lines, which are detected up to the Lyman edge. We also identify weak emission fro…
Two New X-Ray/Optical/Radio Supernova Remnants in M31
Gelfand, Joseph D.; Williams, Benjamin F.; Kong, Albert K. H. +3 more
We compare a deep (37 ks) Chandra ACIS-S image of the M31 bulge to Local Group Survey narrowband optical data and Very Large Array (VLA) radio data of the same region. Our precisely registered images reveal two new optical shells with X-ray counterparts. These shells have sizes, [SII]/Hα flux ratios, and X-ray spectral properties typical of supern…
Warm-hot Intergalactic Medium Emission and the Cluster Soft Excess: A Model Comparison
Bonamente, M.; Mittaz, J.; Lieu, R. +1 more
The confirmation of the cluster soft excess (CSE) by XMM-Newton has rekindled interest as to its origin. The recent detections of CSE emission at large cluster radii together with reports of O VII line emission associated with the CSE has led many authors to conjecture that the CSE is, in fact, a signature of the warm-hot intergalactic medium (WHI…