Search Publications

Study of Early-Type Stars Populations and of Their Origin

Royer, F.

Properties of Emission Line Galaxies at z ≈ 1 to 2

Freudling, Wolfram

A sample of Hα line emitting galaxies at redshifts between 0.7and 1.9 selected from the HST/NICMOS G141 grism parallel survey was recently presented by McCarthy et al. (1999). The galaxies in that sample were identified from quasi-random pointings and therefore should present an unbiased sample of emission line galaxies at that redshift. Spectral …

Gravitational Lens Candidates in the HST Survey of BL Lac Objects

Falomo, R.; Treves, A.; Urry, C. M. +5 more

Eight Gyr Minimum Disk Age from Hipparcos

Jimenez, Raul; Flynn, Chris; Kotoneva, Eira

Active galaxies in the mid-infrared

Lutz, D.; Genzel, R.; Sturm, E. +4 more

Field Stars and Star Clusters in M31

Jablonka, P.

This review reports on recent results obtained from HST/WFPC2 high resolution observations of field stars and star clusters in the bulge and the halo of the nearby galaxy M31.

Circumstellar Silicate Mineralogy

Waters, L. B. F. M.; Justtanont, K.; Tielens, A. G. G. M. +1 more

This paper reviews spectra obtained with the SWS on board of ISO of dust shells around O-rich objects. These spectra reveal the presence of many new emission features between 10 and 45 µm. These bands are generally much narrower than the well-known 10 and 20 µm silicates features. The strength of these features relative to the underlying broad con…

ISO LWS Observations of Cool Evolved Stars and Post-AGB Objects

Barlow, M. J.

ISO-SWS Spectra of OH/IR Stars

Waters, L. B. F. M.; Yamamura, I.; de Jong, T. +2 more

We present the spectra of 5 OH/IR stars observed with the Short Wavelength Spectrometer (SWS) on board the Infrared Space Observatory (ISO). The spectra are dominated by dust features, both in the amorphous and crystalline state and illustrate the influence of the mass loss rate on the observed spectral features.

Molecules of Non-Photospheric Origin in Red Giants and Supergiants Revealed by the ISO SWS

Ohnaka, K.; Yamamura, I.; Tsuji, T. +1 more

Overall SEDs based on ISO SWS observations show fair agreement with photospheric model predictions for red (super)giant stars. However, some details of molecular spectra cannot be explained by a photospheric origin. In particular, fine structure in the H2O 2.7 µm band can be clearly resolved by the SWS and is identified in an early M giant, whose …