A dataset provided by the European Space Agency

Name R71CRYS
Title FIRST DETECTION OF CRYSTALLINE SILICATES IN THE LMC UNRAVELING THE MASS LOSS HISTORY OF R 71
URL

http://nida.esac.esa.int/nida-sl-tap/data?RETRIEVAL_TYPE=OBSERVATION&PRODUCT_LEVEL=ALL&obsno=850013010
DOI https://doi.org/10.5270/esa-0kqwrtw
Author WATERS, LAURENS B
Description we propose to study the ir spectrum of the luminous blue variable (lbv) r71 in the lmc. this object, the brightest stellar source in the lmc at 25 microns, consists of a hot b supergiant with strong mass loss, and a detached asymmetric dust shell, which was ejected during a period of very high mass loss rate in the recent past. using an sws aot01 speed 3 scan we have tentatively detected crystalline silicates in the detached dust envelope of r71. this is the first such detection in an extragalactic system, and in such a low metallicity environment; however, the s/n of the sws aot01 spectrum is not high. in addition, we have discovered 7.7 micron emission using phot-s, suggesting the presence of carbon-rich material. this may imply that the central star has already evolved to a c-rich chemistry. however, the s/n of the phot-s spectrum is insufficient to confirm the presence of other uir bands at 3.3, 6.2 and 8.6 microns. with this proposal we request follow-up observations (cam-cvf and sws-aot06), in order to (1) detect the other uir bands, thus confirming the c-rich nature of part of the environment, and (2) to validate our tentative detection of extragalactic crystalline silicates. ==================================================================== ==> this proposal .. ====================================================================
Instrument CAM01 , CAM04 , SWS06
Temporal Coverage 1998-03-14T20:15:23Z/1998-03-15T00:11:07Z
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 1999-03-24T00:00:00Z
Keywords ISO, infrared, SWS, LWS, ISOCAM, ISOPHOT
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, WATERS et al., 1999, 'FIRST DETECTION OF CRYSTALLINE SILICATES IN THE LMC UNRAVELING THE MASS LOSS HISTORY OF R 71', 1.0, European Space Agency, https://doi.org/10.5270/esa-0kqwrtw