Search Publications
The Dust Content and Opacity of Actively Star-forming Galaxies
Calzetti, Daniela; Storchi-Bergmann, Thaisa; Bohlin, Ralph C. +3 more
We present far-infrared (FIR) photometry at 150 and 205 µm of eight low-redshift starburst galaxies obtained with the Infrared Space Observatory (ISO) ISOPHOT. Five of the eight galaxies are detected in both wave bands, and these data are used, in conjunction with IRAS archival photometry, to model the dust emission at λ>~40 µm. The…
Multiwavelength Observations of Dusty Star Formation at Low and High Redshift
Steidel, Charles C.; Adelberger, Kurt L.
If high-redshift galaxies resemble rapidly star-forming galaxies in the local universe, most of the luminosity produced by their massive stars will have been absorbed by dust and reradiated as far-infrared photons that cannot be detected with existing facilities. This paper examines what can be learned about high-redshift star formation from the s…
An Inventory of Interstellar Ices toward the Embedded Protostar W33A
van Dishoeck, E. F.; Whittet, D. C. B.; Schutte, W. A. +8 more
This paper presents, for the first time, a complete 2.4-25 µm spectrum of the dust-embedded young stellar object W33A. The spectrum was obtained with the Short Wavelength Spectrometer of the Infrared Space Observatory at a mean resolving power of ~750. The spectrum displays deep H2O ice and silicate absorptions centered at 3.0 and…
The Composition and Distribution of Dust along the Line of Sight toward the Galactic Center
Lutz, D.; van Dishoeck, E. F.; Whittet, D. C. B. +5 more
We discuss the composition of dust and ice along the line of sight to the Galactic center (GC) based on analysis of mid-infrared spectra (2.4-13 µm) from the Short Wavelength Spectrometer on the Infrared Space Observatory (ISO). We have analyzed dust absorption features arising in the molecular cloud material and the diffuse interstellar med…
Massive Star Formation and Evolution in Starburst Galaxies: Mid-infrared Spectroscopy with the ISO Short Wavelength Spectrometer
Förster Schreiber, Natascha M.; Lutz, Dieter; Spoon, Henrik W. W. +4 more
We present new Infrared Space Observatory Short Wavelength Spectrometer data for a sample of 27 starburst galaxies, and with these data we examine the issues of formation and evolution of the most massive stars in starburst galaxies. Using starburst models which incorporate time evolution, new stellar atmosphere models for massive stars, and a sta…
High-Resolution Imaging of Molecular Gas and Dust in the Antennae (NGC 4038/39): Super Giant Molecular Complexes
Wilson, Christine D.; Madden, Suzanne C.; Charmandaris, Vassilis +1 more
We present new aperture synthesis CO maps of the Antennae (NGC 4038/39) obtained with the Caltech Millimeter Array. These sensitive images show molecular emission associated with the two nuclei and a partial ring of star formation to the west of NGC 4038, as well as revealing the large extent of the extranuclear region of star formation (the ``ove…
The Mid-Infrared Spectra of Normal Galaxies
Helou, G.; Malhotra, S.; Werner, M. W. +2 more
The mid-infrared spectra (2.5-5 and 5.7-11.6 µm) obtained by ISOPHOT reveal the interstellar medium emission from galaxies powered by star formation to be strongly dominated by the aromatic features at 6.2, 7.7, 8.6, and 11.3 µm. Additional emission appears in between the features, and an underlying continuum is clearly evident at 3-5 …
2-45 Micron Infrared Spectroscopy of Carbon-rich Proto-Planetary Nebulae
Volk, Kevin; Kwok, Sun; Hrivnak, Bruce J.
Infrared Space Observatory (ISO) 2-45 µm observations of seven proto-planetary nebulae (PPNs) and two other carbon-rich objects are presented. The unidentified emission features at 21 and 30 µm are detected in six sources, including four new detections of the 30 µm feature. This previously unresolved 30 µm feature is now re…
Far-infrared Detection of C3 in Sagittarius B2 and IRC +10216
Cernicharo, José; Goicoechea, Javier R.; Caux, Emmanuel
We report on the detection of nine lines of the ν2 bending mode of triatomic carbon, C3, in the direction of Sagittarius B2. The R(4) and R(2) lines of C3 have been also detected in the carbon-rich star IRC +10216. The abundances of C3 in the direction of Sgr B2 and IRC +10216 are ~=3×10-8 and…
Infrared Space Observatory Mid-Infrared Spectra of Reflection Nebulae
Werner, M. W.; Sellgren, K.; Uchida, K. I. +1 more
We present 5-15 µm imaging spectroscopy of the reflection nebulae vdB 17 (NGC 1333), vdB 59 (NGC 2068), vdB 101, vdB 111, vdB 133, and vdB 135, obtained with the infrared camera and circular variable filter wheel on the Infrared Space Observatory (ISO). These nebulae are illuminated by stars with Teff=3,600-19,000 K, implying UV (…