Science Archives Publication System

Distant Red Galaxies in the Hubble Ultra Deep Field

DOI: 10.1086/430346 Bibcode: 2005ApJ...624L...9T

Toft, S.; van Dokkum, P.; Bouwens, R. J. +4 more

We take advantage of the Hubble Ultra Deep Field data to study the rest-frame optical and UV morphologies of the novel population of distant red galaxies (DRGs). Six galaxies with J-K_s>2.3 are found to K_s=21.5, five of which have photometric redshifts z_phot>~2, corresponding to a surface density of 0.9 arcmin…

2005 • The Astrophysical Journal

eHST 42

A New View of the Circumstellar Environment of SN 1987A

DOI: 10.1086/430396 Bibcode: 2005ApJ...627..888S

Crotts, Arlin P. S.; Lawrence, Stephen S.; Sugerman, Ben E. K. +2 more

We summarize the analysis of a uniform set of both previously known and newly discovered scattered-light echoes, detected within 30" of SN 1987A in 10 years of optical imaging, and with which we have constructed the most complete three-dimensional model of the progenitor's circumstellar environment. Surrounding the SN is a richly structured bipola…

2005 • The Astrophysical Journal

eHST 42

First VLTI/MIDI observations of a Be star: Alpha Arae

DOI: 10.1051/0004-6361:20041954 Bibcode: 2005A&A...435..275C

Meilland, A.; Robbe-Dubois, S.; Domiciano de Souza, A. +12 more

We present the first VLTI/MIDI observations of the Be star alpha Ara (HD 158 427), showing a nearly unresolved circumstellar disk in the N band. The interferometric measurements made use of the UT1 and UT3 telescopes. The projected baselines were 102 and 74 meters with position angles of 7 ° and 55°, respectively. These measurements put an upper l…

2005 • Astronomy and Astrophysics

Hipparcos IUE 42

Methods for the analysis of data from the Planetary Fourier Spectrometer on the Mars Express Mission

DOI: 10.1016/j.pss.2005.01.006 Bibcode: 2005P&SS...53.1017G

Ignatiev, N. I.; Zasova, L. V.; Formisano, V. +4 more

This work presents an algorithm for the scientific analysis of individual calibrated measurements from the Planetary Fourier spectrometer (PFS). The instrument, included in the scientific payload of the ESA Mars Express mission to Mars, acquires spectra in the range between 250 and 8200 cm ^-1, with a sampling step of ∼1 cm ^-1…

2005 • Planetary and Space Science

MEx 42

Probing the Kinematics of the Narrow-Line Region in Seyfert Galaxies with Slitless Spectroscopy: Observational Results

DOI: 10.1086/426372 Bibcode: 2005AJ....129...73R

Gull, T. R.; Kraemer, S. B.; Crenshaw, D. M. +5 more

We present slitless spectra of 10 Seyfert galaxies observed with the Space Telescope Imaging Spectrograph on the Hubble Space Telescope (HST). The spectra cover the [O III] λλ4959, 5007 emission lines at a spectral resolving power of λ/Δλ~9000 and a spatial resolution of ~0.1". We compare the slitless spectra with previous HST narrowband images to…

2005 • The Astronomical Journal

eHST 42

Multiwavelength Observations of Radio Galaxy 3C 120 with XMM-Newton

DOI: 10.1086/425894 Bibcode: 2005ApJ...618..139O

Malkan, M. A.; Page, M. J.; Tornikoski, M. +5 more

We present XMM-Newton observations of the radio galaxy 3C 120. Contemporaneous radio, millimeter-wave, and optical data provide additional constraints on the spectral energy distribution and physical state of the active galactic nucleus. The hard X-ray spectrum contains a marginally resolved Fe I Kα emission line with FWHM=9000+/-3000 km s^-1<…

2005 • The Astrophysical Journal

XMM-Newton eHST 42

Improved Laboratory Transition Probabilities for Pt I and Application to the Platinum Abundances of BD +17°3248 and the Sun

DOI: 10.1086/426381 Bibcode: 2005ApJ...619..639D

Sneden, C.; Beers, T. C.; Lawler, J. E. +3 more

Radiative lifetimes, accurate to +/-5%, have been measured for 58 odd-parity levels of Pt I using laser-induced fluorescence. The lifetimes were combined with branching fractions measured using grating and Fourier transform spectrometry to determine transition probabilities for 127 lines of Pt I. The new Pt lifetime measurements were found to be i…

2005 • The Astrophysical Journal

eHST 42

Modelling cosmic ray intensities along the Ulysses trajectory

DOI: 10.5194/angeo-23-1061-2005 Bibcode: 2005AnGeo..23.1061N

Ferreira, S. E. S.; Potgieter, M. S.; Heber, B. +1 more

Time dependent cosmic ray modulation in the inner heliosphere is studied by comparing results from a 2-D, time-dependent cosmic ray transport model with Ulysses observations. A compound approach, which combines the effects of the global changes in the heliospheric magnetic field magnitude with drifts to establish a realistic time-dependence, in th…

2005 • Annales Geophysicae

Ulysses 42

The supermassive black hole in the Seyfert 2 galaxy NGC 5252

DOI: 10.1051/0004-6361:20041701 Bibcode: 2005A&A...431..465C

Marconi, A.; Capetti, A.; Axon, D. +1 more

We present results from HST/STIS long-slit spectroscopy of the gas motions in the nuclear region of the Seyfert 2 galaxy NGC 5252. The observed velocity field is consistent with gas in regular rotation with superposed localized patches of disturbed gas. The dynamics of the circumnuclear gas can be accurately reproduced by adding to the stellar mas…

2005 • Astronomy and Astrophysics

eHST 42

MV Lyrae in Low, Intermediate, and High States

DOI: 10.1086/429143 Bibcode: 2005ApJ...624..923L

Szkody, Paula; Sion, Edward M.; Hoard, D. W. +4 more

Archival IUE spectra of the VY Sculptoris system MV Lyrae, taken during an intermediate state, can be best fit by an isothermal accretion disk extending half-way to the tidal cutoff radius. In contrast, a recent HST spectrum, while MV Lyr was in a high state, can be best fit with a standard T(R) profile for an accretion disk extending from an inne…

2005 • The Astrophysical Journal

IUE eHST 42