Science Archives Publication System

The Fundamental Plane of Cluster Elliptical Galaxies at z=1.25

DOI: 10.1086/428663 Bibcode: 2005ApJ...620L..83H

Rosati, P.; Rix, H. -W.; van der Wel, A. +8 more

Using deep Hubble Space Telescope Advanced Camera for Surveys imaging and Very Large Telescope FOcal Reducer/low dispersion Spectrograph 2 spectra, we determined the velocity dispersions, effective radii, and surface brightnesses for four early-type galaxies in the z=1.237 cluster RDCS 1252.9-2927. All four galaxies are massive, greater than 10

2005 • The Astrophysical Journal

eHST 83

The evolution of planetary nebulae. III. Internal kinematics and expansion parallaxes

DOI: 10.1051/0004-6361:20053108 Bibcode: 2005A&A...441..573S

Steffen, M.; Schönberner, D.; Jacob, R.

A detailed theoretical study of the basic internal kinematics of planetary nebulae is presented, based on 1D radiation-hydrodynamics simulations of circumstellar envelopes around central stars of 0.595 and 0.696 M_⊙. By means of observable quantities like radial surface-brightness distributions and emission-line profiles computed from th…

2005 • Astronomy and Astrophysics

eHST 83

Optical novae: the major class of supersoft X-ray sources in M 31

DOI: 10.1051/0004-6361:20053127 Bibcode: 2005A&A...442..879P

Pietsch, W.; Haberl, F.; Greiner, J. +4 more

We searched for X-ray counterparts of optical novae detected in M 31 and M 33. We combined an optical nova catalogue from the WeCAPP survey with optical novae reported in the literature and correlated them with the most recent X-ray catalogues from ROSAT, XMM-Newton, and Chandra, and in addition searched for n…

2005 • Astronomy and Astrophysics

XMM-Newton 83

Magnetohydrodynamic Simulations of the Solar Corona and Solar Wind Using a Boundary Treatment to Limit Solar Wind Mass Flux

DOI: 10.1086/491791 Bibcode: 2005ApJS..161..480H

Hayashi, Keiji

Magnetohydrodynamic simulations of the solar corona and solar wind are sensitive to conditions in the sub-Alfvénic plasma at the base of the solar corona because the structure of the simulated solar corona is determined by the pressure balance of the plasma and the magnetic field. Therefore, it is important to construct an adequate boundary treatm…

2005 • The Astrophysical Journal Supplement Series

Ulysses 83

Hubble Space Telescope WFPC2 Color-Magnitude Diagrams for Globular Clusters in M31

DOI: 10.1086/429567 Bibcode: 2005AJ....129.2670R

Djorgovski, S. G.; Cacciari, C.; Rich, R. M. +4 more

We report new photometry for 10 globular clusters in M31, observed to a uniform depth of four orbits in F555W (V) and F814W (I) using WFPC2 on board the Hubble Space Telescope (HST). In addition, we have reanalyzed HST archival data of comparable quality for two more clusters. A special feature of our analysis is the extraordinary care taken to ac…

2005 • The Astronomical Journal

eHST 82

A 3-5 µm VLT spectroscopic survey of embedded young low mass stars II. Solid OCN^-

DOI: 10.1051/0004-6361:20041711 Bibcode: 2005A&A...441..249V

van Dishoeck, E. F.; Pontoppidan, K. M.; Fraser, H. J. +1 more

The 4.62 µm (2164.5 cm^-1) “XCN” band has been detected in the M-band spectra of 34 deeply embedded young stellar objects (YSO's), observed with high signal-to-noise and high spectral resolution with the VLT-ISAAC spectrometer, providing the first opportunity to study the solid OCN^- abundance toward a large number of low…

2005 • Astronomy and Astrophysics

ISO 82

Solar Type II Radio Bursts and IP Type II Events

DOI: 10.1086/428820 Bibcode: 2005ApJ...623.1180C

Cane, H. V.; Erickson, W. C.

We have examined radio data from the WAVES experiment on the Wind spacecraft in conjunction with ground-based data in order to investigate the relationship between the shocks responsible for metric type II radio bursts and the shocks in front of coronal mass ejections (CMEs). The bow shocks of fast, large CMEs are strong interplanetary (IP) shocks…

2005 • The Astrophysical Journal

SOHO 82

Proper Motions of Dwarf Spheroidal Galaxies from Hubble Space Telescope Imaging. III. Measurement for Ursa Minor

DOI: 10.1086/430532 Bibcode: 2005AJ....130...95P

Minniti, Dante; Mateo, Mario; Piatek, Slawomir +5 more

This article presents a measurement of the proper motion of the Ursa Minor dwarf spheroidal galaxy determined from images taken with the Hubble Space Telescope in two distinct fields. Each field contains a quasi-stellar object that serves as the ``reference point.'' The measured proper motion for Ursa Minor, expressed in the equatorial coordinate …

2005 • The Astronomical Journal

eHST 82

A jet-induced outflow of warm gas in 3C293

DOI: 10.1111/j.1365-2966.2005.09354.x Bibcode: 2005MNRAS.362..931E

Morganti, R.; Tadhunter, C. N.; Holt, J. +3 more

Using long-slit emission-line spectra we detect a fast outflow of ionized gas, with velocities up to 1000 km s^-1, in the nearby powerful radio galaxy 3C293 (z= 0.045). The fast outflow is located about 1 kpc east of the nucleus, in a region of enhanced radio emission due to the presence of a distorted radio jet. We present results that …

2005 • Monthly Notices of the Royal Astronomical Society

eHST 81

Radial variations in the Io plasma torus during the Cassini era

DOI: 10.1029/2005JA011251 Bibcode: 2005JGRA..11012223D

Delamere, P. A.; Bagenal, F.; Steffl, A.

A radial scan through the midnight sector of the Io plasma torus was made by the Cassini Ultraviolet Imaging Spectrograph on 14 January 2001, shortly after closest approach to Jupiter. From these data, Steffl et al. (2004a) derived electron temperature, plasma composition (ion mixing ratios), and electron column density as a function of radius fro…

2005 • Journal of Geophysical Research (Space Physics)

Huygens 80