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The European Large Area ISO Survey - IV. The preliminary 90-µm luminosity function
Rigopoulou, D.; Serjeant, S.; Morel, T. +11 more
We present the luminosity function of 90-µm-selected galaxies from the European Large Area ISO Survey (ELAIS), extending to z=0.3. Their luminosities are in the range 109< h 65 -2L/Lsolar<1012, i.e. non-ultraluminous. From our sample of 37 reliably detected galaxies in the ELAIS S1 region from the Efsta…
Phase-resolved Hubble Space Telescope/STIS Spectroscopy of the Exposed White Dwarf in the High-Field Polar AR Ursae Majoris
Szkody, Paula; Gänsicke, Boris T.; Jordan, Stefan +1 more
Phase-resolved Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) ultraviolet spectroscopy of the high-field polar AR UMa confirms that the white dwarf photospheric Lyα Zeeman features are formed in a magnetic field of ~200 MG. In addition to the Lyα π and σ+ components, we detect the forbidden hydrogen 1s0
Infrared and Millimetric Study of the Young Outflow Cepheus E
Cernicharo, José; Testi, Leonardo; Molinari, Sergio +3 more
The Cepheus E outflow has been studied in the mid- and far-IR using the ISOCAM and Long Wavelength Spectrometer (LWS) instruments and at millimetric wavelengths using the Owens Valley Radio Observatory (OVRO). In the near- and mid-IR, its morphology is similar to that expected for a jet-driven outflow, where the leading bow shocks entrain and acce…
Deep Hubble Space Telescope imaging surveys and the formation of spheroidal galaxies
Franceschini, Alberto; Rodighiero, Giulia; Fasano, Giovanni
We have extended our previous analysis of morphologically selected elliptical and S0 galaxies in the Hubble Deep Field (HDF) North to include Hubble Space Telescope (HST) data in the HDF South and the HDFS-NICMOS areas. Our final sample amounts to 69 E/S0 galaxies with K<20.15 over an area of 11arcmin2. Although a moderately small nu…
Deep Hubble Space Telescope WFPC2 Photometry of M31's Thick Disk (?)
Sarajedini, Ata; Van Duyne, Jeffrey
We present deep color-magnitude diagrams (CMDs) for a field along the outer disk of M31 based on archival Hubble Space Telescope Wide Field Planetary Camera 2 observations in the F555W (~V) and F814W (~I) filters. The CMDs, which contain a total of about 50,000 stars, feature a prominent red giant branch (RGB) along with a significant population o…
2D modelling of the light distribution of early-type galaxies in a volume-limited sample - II. Results for real galaxies
D'Onofrio, M.
In this paper we analyse the results of the two-dimensional (2D) fit of the light distribution of 73 early-type galaxies belonging to the Virgo and Fornax clusters, a sample volume- and magnitude-limited down to MB=-17.3, and highly homogeneous. In our previous paper (Paper I) we have presented the adopted 2D models of the surface-brigh…
Hubble Space Telescope Spectroscopy of the Dwarf Nova RX Andromedae. I. The Underlying White Dwarf
Szkody, Paula; Sion, Edward M.; Cheng, F. H. +3 more
We obtained Hubble Space Telescope Goddard High Resolution Spectrograph phase-resolved spectroscopic observations of the dwarf nova RX Andromedae at three times in its outburst cycle: (1) near the end of an extraordinarily deep and long dwarf nova quiescence, 3 months after the last outburst; (2) during the rise to outburst; and (3) near the end o…
An active binary XY UMa revisited
Chochol, D.; Vittone, A. A.; Errico, L. +4 more
New extensive multicolour photoelectric photometry, performed since 1994, is presented. 17 more-or-less complete light curves were obtained and analyzed. The Wilson-Devinney code applied to the BVRI light curves without the maculation effect together with published spectroscopic mass ratio and semi-major axis yielded new absolute parameters of the…
Modeling Mid-Ultraviolet Spectra. I. Temperatures of Metal-poor Stars
Dorman, Ben; Rood, Robert T.; Peterson, Ruth C.
Determining the properties of remote globular clusters and elliptical galaxies using evolutionary population synthesis requires a library of reliable model stellar fluxes. Empirical libraries are limited to spectra of stars in the solar neighborhood, with nearly solar abundances and abundance ratios. We report here a first step toward providing a …
The composition of circumstellar gas and dust in 51 Oph
Waters, L. B. F. M.; van den Ancker, M. E.; Meeus, G. +2 more
We analyze ISO archive data of the nearby bright emission-line star 51 Oph, previously classified as a proto-planetary system similar to beta Pic. The infrared spectrum reveals the presence of gas-phase emission bands of hot ( ~ 850 K) CO, CO_2, H_2O and NO. In addition to this, partially crystalline silicate dust is present. The solid-state bands…