Search Publications
The Environment of M85 Optical Transient 2006-1: Constraints on the Progenitor Age and Mass
Cenko, S. B.; Kulkarni, S. R.; Ferrarese, L. +11 more
M85 Optical Transient 2006-1 (M85 OT 2006-1) is the most luminous member of the small family of V838 Mon-like objects, whose nature is still a mystery. This event took place in the Virgo Cluster of galaxies and peaked at an absolute magnitude of MI ≈ - 13. Here we present Hubble Space Telescope images of M85 OT 2006-1 and its environmen…
Absorption Phenomena and a Probable Blast Wave in the 13 July 2004 Eruptive Event
Shibasaki, K.; Grechnev, V. V.; Chertok, I. M. +3 more
We present a case study of the 13 July 2004 solar event, in which disturbances caused by eruption of a filament from an active region embraced a quarter of the visible solar surface. Remarkable are the absorption phenomena observed in the SOHO/EIT 304 Å channel, which were also visible in the EIT 195 Å channel, in the Hα line, and even in total ra…
The XMM-Newton bright serendipitous survey. Identification and optical spectral properties
Sbarufatti, B.; Pietsch, W.; Page, M. J. +12 more
Aims:We present the optical classification and redshift of 348 X-ray selected sources from the XMM-Newton Bright Serendipitous Survey (XBS), which contains a total of 400 objects (identification level = 87%). About 240 are new identifications. In particular, we discuss in detail the classification criteria adopted for the active galactic nuclei (A…
Plasmoids in reconnecting current sheets: Solar and terrestrial contexts compared
Farrugia, C. J.; Cranmer, S. R.; Lin, J.
Magnetic reconnection plays a crucial role in violent energy conversion occurring in the environments of high electrical conductivity, such as the solar atmosphere, magnetosphere, and fusion devices. We focus on the morphological features of the process in two different environments, the solar atmosphere and the geomagnetic tail. In addition to in…
CAWSES November 7-8, 2004, superstorm: Complex solar and interplanetary features in the post-solar maximum phase
Tsurutani, Bruce T.; Echer, Ezequiel; Guarnieri, Fernando L. +1 more
The complex interplanetary structures during 7 to 8 Nov 2004 are analyzed to identify their properties as well as resultant geomagnetic effects and the solar origins. Three fast forward shocks, three directional discontinuities and two reverse waves were detected and analyzed in detail. The three fast forward shocks ``pump'' up the interplanetary …
Characterization of mesoscale gravity waves in the upper and lower clouds of Venus from VEX-VIRTIS images
Hueso, R.; Sánchez-Lavega, A.; Drossart, P. +3 more
Images obtained from the Visible and InfraRed Thermal Imaging Spectrometer (VIRTIS)-M instrument onboard Venus Express present visible trains of alternating bands of cloud brightness in two different layers: at the upper cloud tops (~66 km altitude) observed in the dayside hemisphere using reflected ultraviolet light (380 nm) and in the lower clou…
On the evidence for narrow, relativistically shifted X-ray lines
Vaughan, S.; Uttley, P.
In recent years, there have been many reported detections of highly redshifted or blueshifted narrow spectral lines (both emission or absorption) in the X-ray spectra of active galaxies, but these are all modest detections in terms of their statistical significance. The aim of this paper is to review the issue of the significance of these detectio…
The (Re-)Discovery of G350.1-0.3: A Young, Luminous Supernova Remnant and Its Neutron Star
Camilo, F.; Miller, J. M.; Gaensler, B. M. +6 more
We present an XMM-Newton observation of the long-overlooked radio source G350.1-0.3. The X-ray spectrum of G350.1-0.3 can be fit by a shocked plasma with two components: a high-temperature (1.5 keV) region with a low ionization timescale and enhanced abundances, plus a cooler (0.36 keV) component in ionization equilibrium and with solar abundances…
Integral field near-infrared spectroscopy of II Zw 40
Cresci, G.; Vanzi, L.; Melnick, J. +1 more
We present integral field spectroscopy in the near-infrared of the nearby starburst galaxy II Zw 40. Our new observations provide an unprecedented detailed view of the interstellar medium and star formation of this galaxy. The radiation emitted by the galaxy is dominated by a giant HII region, which extends over an area of more than 400 pc in size…
Color Profiles of Disk Galaxies since z ~ 1: Probing Outer Disk Formation Scenarios
Beckman, J. E.; Trujillo, I.; Azzollini, R.
We present deep color profiles for a sample of 415 disk galaxies within the redshift range 0.1 < z <= 1.1, and contained in HST ACS imaging of the GOODS-South field. For each galaxy, passband combinations are chosen to obtain, at each redshift, the best possible approximation to the rest-frame u - g color. We find that objects which show a t…