| Name | EGALPAH |
| Title | THE ORIGIN OF DUST AND PAHS IN ELLIPTICAL GALAXIES |
| URL | |
| DOI | https://doi.org/10.5270/esa-tsij0a5 |
| Author | BREGMAN, JOEL N |
| Description | elliptical galaxies have hot x-ray emitting atmospheres but practically no cold gas, so it came as a surprise that they are often iras sources. there are two likely explanations for the origin and heating of the dust that emits this infrared radiation. the dust may be in a low-mass disk of neutral gas near the center of the galaxy and is heated by starlight. alternatively, the dust is shed by stars during stellar evolution and heated by collisions with the ambient hot x-ray emitting gas or by starlight. these different possibilities have distinctive signatures in the extent and shape of infrared emission as well as the presence or absence of the pah bands. we propose to determine the origin and heating of the dust by obtaining cam images of 11 x-ray emitting elliptical galaxies. by using multiple narrow filters in the 5-17 micron range we will be able to separate the pah component as well as establish the shape and extent of the emission. |
| Instrument | CAM01 |
| Temporal Coverage | 1997-05-06T04:29:53Z/1998-03-12T14:28:56Z |
| Version | 1.0 |
| Mission Description | The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths. |
| Creator Contact | https://support.cosmos.esa.int/iso/ |
| Date Published | 1999-04-30T00:00:00Z |
| Last Update | 2026-03-02 |
| Keywords | Infrared Space Observatory data, ESA ISO mission dataset, ISO infrared observations, mid-infrared astronomy data, far-infrared spectroscopy dataset, ISOCAM imaging data, ISOPHOT photometry data, SWS short wavelength spectrometer data, LWS long wavelength spectrometer data, infrared spectral line observations, infrared imaging survey data, dust emission infrared observations, star formation infrared dataset, interstellar medium spectroscopy data, polycyclic aromatic hydrocarbons PAH features data, active galactic nuclei infrared observations, circumstellar envelope infrared data, planetary nebula infrared spectroscopy, extragalactic infrared survey data, calibrated ISO data products, FITS files infrared astronomy, spectral energy distribution infrared data, continuum photometry dataset, infrared spectral cubes, flux-calibrated infrared maps, ESA ISO Data Archive, legacy infrared space mission dataset |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, BREGMAN et al., 1999, 'THE ORIGIN OF DUST AND PAHS IN ELLIPTICAL GALAXIES', 1.0, European Space Agency, https://doi.org/10.5270/esa-tsij0a5 |