A dataset provided by the European Space Agency

Name SWSPPN02
Title SWS SPECTROSCOPY OF OBSCURED PROTO-PLANETARY NEBULAE
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=181014050
DOI https://doi.org/10.5270/esa-fkmffhf
Author HRIVNAK, BRUCE J
Description the goal of this proposal is to determine the chemical properties of the dust shells of obscured proto-planetary nebulae (ppn) through a study of their short-wavelength infrared spectra. spectral features in the 10 to 20 micron region indicate the chemical nature (oxygen or carbon-rich), and the strengths of the features relate to the physical properties of the shells. a few carbon-rich ppn have been observed to show pah features and an unidentified 21 micron emission feature. we propose to observe a sample of iras sources which have the expected properties of ppn and which have no visible counterparts (v>20 mag). these we have located and observed from the ground, obtaining near- and mid-infrared photometry. essentially all previously studied ppn have visible counterparts. compared with these, we believe this sample of invisible ppn are obscured either because they had a higher mass-loss rate on the agb or because they are less evolved post-agb objects and their shells have not yet expanded sufficiently for visible light to escape. in either case, this study will allow us to investigate a sample of ppn at a different state of evolution from other ppn studied, which have visible counterparts of g-a spectral types. this will advance our understanding of the range and evolution of the properties of circumstellar shells in this important evolutionary stage. only iso provides the spectral range and resolution necessary to carry out these observations.
Instrument SWS01
Temporal Coverage 1996-05-16T12:08:23Z/1996-12-17T00:31:01Z
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 1999-04-08T00:00:00Z
Last Update 2026-07-09
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, HRIVNAK et al., 1999, 'SWS SPECTROSCOPY OF OBSCURED PROTO-PLANETARY NEBULAE', 1.0, European Space Agency, https://doi.org/10.5270/esa-fkmffhf
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.