Search Publications
Detection of the ``44 MU m'' band of water ice in absorption in combined ISO SWS-LWS spectra
Heras, A. M.; Tielens, A. G. G. M.; Cox, P. +8 more
We report the detection of the transverse optical vibrational band of water ice at 44 microns in absorption towards two embedded infrared sources, IRAS 18316-0602 (RAFGL7009S) and IRAS 19110+1045. The water band extending from 30 to about 80 microns is a prominent feature in the combined ISO SWS and LWS grating spectra. Using new optical constants…
Cygnus A: stars, dust and cones
Sparks, William B.; Tadhunter, Clive; Jackson, Neal
We present new Hubble Space Telescope (HST) continuum and spectral line images of the radio galaxy Cygnus A. The images show much complex structure in the central kpc^2. Continuum images show the central dust lane in detail, allowing detailed maps of E(B-V) to be constructed; the dust appears to follow a roughly Galactic extinction law. The emissi…
CO observations and mass loss of MS- and S-stars
Groenewegen, M. A. T.; de Jong, T.
We present (12) CO J = 1-0 and 2-1 observations of 14 S-stars, and report 6 new detections. Two stars were observed in the (13) CO J = 1-0 and 2-1 lines, and one tentative 2-1 detection is reported. A compilation is presented of all CO observations of S-stars. The stars in this sample are separated into ``intrinsic'' and ``extrinsic'' S-stars, bas…
Observations of Coronal Structures Above an Active Region by EIT and Implications for Coronal Energy Deposition
Michels, D. J.; Thompson, B. J.; Gurman, J. B. +19 more
Solar EUV images recorded by the EUV Imaging Telescope (EIT) on SOHO have been used to evaluate temperature and density as a function of position in two largescale features in the corona observed in the temperature range of 1.0-2.0 MK. Such observations permit estimates of longitudinal temperature gradients (if present) in the corona and, conseque…
Cosmic-Ray 26Al and Its Decay in the Galaxy
Simpson, J. A.; Connell, J. J.
Radioactive 26Al (τ1/2=8.7×105 yr) has been resolved from stable 27Al in the cosmic radiation for the first time using the high mass resolution, charged particle telescope on the Ulysses spacecraft. The average density of the interstellar medium through which the cosmic radiation propagates was determine…
Type III radio source located by Ulysses/Wind triangulation
Kaiser, M. L.; Stone, R. G.; Fainberg, J. +1 more
Radio triangulation from the widely separated Ulysses and Wind spacecraft is used to reconstruct the trajectory of a type III radio burst in the three-dimensional heliosphere. The derived radio trajectory follows a (Parker) spiral path corresponding to a solar wind speed of ~200km/s and progresses to the south of the ecliptic plane. These remote r…
Deep ISOCAM view of the core of the lensing cluster A2390
Elbaz, D.; Pierre, M.; Vigroux, L. +4 more
We have imaged the inner square arcminute of the well known lensing and cooling flow cluster A2390 (z = 0.23) down to a sensitivity of 65 and 130 mu Jy at 6.75 and 15 mu m, respectively. We report the first evidence of an active star-forming region in a cooling flow (at those wavelengths) and strong emission in the mid-IR from lensed galaxies loca…
Integrated Ultraviolet Spectra and Line Indices of M31 Globular Clusters and the Cores of Elliptical Galaxies
Rieke, Marcia J.; Frogel, Jay A.; O'Connell, Robert W. +6 more
We present observations of the integrated light of four M31 globular clusters (MIV, MII, K280, and K58) and of the cores of six elliptical galaxies (NGC 3605, 3608, 5018, 5831, 6127, and 7619) made with the Faint Object Spectrograph on the Hubble Space Telescope. The spectra cover the range 2200-4800 Å at a resolution of 8 Å with signal-to-noise r…
Characterization and Subtraction of Well-Exposed HST/NICMOS Camera 2 Point-Spread Functions for a Survey of Very Low Mass Companions to Nearby Stars
Krist, John E.; Golimowski, David A.; Schroeder, Daniel J. +1 more
We are conducting a search for very low mass (M<0.2 M_solar) companions of stars within 10 pc of the Sun using the NICMOS infrared camera on the Hubble Space Telescope. The highly exposed images of each target star are subtracted from the NICMOS Camera 2 (NIC2) field using previously observed stars so that faint companions may be detected. We h…
Infrared Emission-Line Galaxies Associated with Dampened Ly alpha and Strong Metal Absorber Redshifts
Thompson, D.; Mannucci, F.; Williger, G. M. +1 more
Eighteen candidates for emission-line galaxies were discovered in a narrowband infrared survey that targeted the redshifts of damped Lyα or metal lines in the spectra of quasars. The presence of emission lines is inferred from the photometric magnitudes in narrowband and broadband interference filters, corresponding to Hα at redshifts of 0.89 (six…