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The high energy emission line spectrum of NGC 1068
Bianchi, S.; Guainazzi, M.; Molendi, S. +1 more
We present and discuss the high energy (E>4 keV) XMM-Newton spectrum of the Seyfert 2 galaxy, NGC 1068. Possible evidence for flux variability in both the neutral and ionized reflectors with respect to a BeppoSAX observation taken 3.5 years before is found. Several Fe and Ni emission lines, from both neutral and highly ionized material, are det…
Deep Luminosity Functions of Old and Intermediate-Age Globular Clusters in NGC 1316: Evidence for Dynamical Evolution of Second-Generation Globular Clusters
Gilmore, Diane; Whitmore, Bradley C.; Schweizer, François +1 more
The Advanced Camera for Surveys on board the Hubble Space Telescope has been used to obtain deep high-resolution images of the giant early-type galaxy NGC 1316, an obvious merger remnant. These observations supersede previous shallower imagery that revealed the presence of a population of metal-rich globular clusters of intermediate age (~3 Gyr). …
The Luminosity-Metallicity relation of distant luminous infrared galaxies
Elbaz, D.; Flores, H.; Cesarsky, C. J. +3 more
One hundred and five 15 \mum-selected objects in three ISO (Infrared Space Observatory) deep survey fields (CFRS 3h, UDSR and UDSF) are studied on the basis of their high-quality optical spectra with resolution R>1000 from VLT/FORS2. ∼92 objects (88%) have secure redshifts, ranging from 0 to 1.16 with a median value of z_med=0.587. <…
The Deuterium-to-Hydrogen Ratio in a Low-Metallicity Cloud Falling onto the Milky Way
Kruk, J. W.; Savage, B. D.; Wakker, B. P. +13 more
Using Far Ultraviolet Spectroscopic Explorer (FUSE) and Hubble Space Telescope observations of the QSO PG 1259+593, we detect D I Lyman series absorption in high-velocity cloud Complex C, a low-metallicity gas cloud falling onto the Milky Way. This is the first detection of atomic deuterium in the local universe in a location other than the nearby…
The Kinematics of Morphologically Selected z~2 Galaxies in the GOODS-North Field
Pettini, Max; Erb, Dawn K.; Shapley, Alice E. +2 more
We present near-IR spectra of Hα emission from 13 galaxies at z~2 in the Great Observatories Origins Deep Survey-North (GOODS-N) field. The galaxies were selected primarily because they appear to have elongated morphologies, and slits were aligned with the major axes (as determined from the rest-frame UV emission) of 11 of the 13. If the galaxies …
Wavelet Phase Coherence Analysis: Application to a Quiet-Sun Magnetic Element
Judge, Philip G.; Lites, Bruce W.; Mathioudakis, Mihalis +3 more
A new application of wavelet analysis is presented that utilizes the inherent phase information residing within the complex Morlet transform. The technique is applied to a weak solar magnetic network region, and the temporal variation of phase difference between TRACE 1700 Å and SOHO/SUMER C II 1037 Å intensities is shown. We present, for the firs…
Kinematics and Ultraviolet to Infrared Morphology of the Inner Homunculus of η Carinae
Corcoran, Michael F.; Walborn, Nolan R.; Hamann, Fred +12 more
We present the first ultraviolet and optical images of η Car and its circumstellar Homunculus nebula, obtained with the Advanced Camera for Surveys/High Resolution Camera (ACS/HRC) on board the Hubble Space Telescope (HST). Compared to those at visual wavelengths, UV images reveal excess emission 0.1"-0.6" from the central source along the minor a…
Formation and evolution of S0 galaxies: a SAURON case study of NGC 7332
Bacon, Roland; Emsellem, Eric; Peletier, Reynier F. +8 more
We present SAURON integral-field observations of the S0 galaxy NGC 7332. Existing broad-band ground-based and Hubble Space Telescope (HST) photometry reveals a double-disc structure and a boxy bulge interpreted as a bar viewed close to edge-on. The SAURON two-dimensional stellar kinematic maps confirm the existence of the bar and inner disc but al…
Cluster observations of hot flow anomalies
Balogh, A.; Dandouras, I.; RèMe, H. +2 more
On 2 April 2002, Cluster entered the solar wind at high northern latitudes and observed a series of disturbances upstream of the bow shock. We suggest that these were signatures of a sequence of hot flow anomalies (HFAs), observed at different stages of development. We estimate the orientation and motion of the HFAs and structures within them usin…
The ubiquitous nature of the horizontal branch second U-jump. A link with the Blue Hook scenario?
Recio-Blanco, A.; De Angeli, F.; Momany, Y. +5 more
In a previous paper we reported on a discontinuity in the extreme horizontal branch (EHB) of the Galactic globular cluster NGC 6752, which we called the second U-jump. This feature was attributed to a combination of post zero-age horizontal branch evolution and diffusion effects. In this follow-up study we analyze other EHB clusters and show that …