a Spectroscopic Map of the Core of Eta Carinae - CYC3MEDIUM

Details a Spectroscopic Map of the Core of Eta Carinae - CYC3MEDIUM a Spectroscopic Map of the Core of Eta Carinae - CYC3MEDIUM

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4509d&link_type=abstract

HST Proposal ID #4509

Physics

Hst Proposal Id #4509

Scientific paper

FOS/RD observations of the core of Eta Carinae at wavelengths 5000--8000 A are needed to supplement and complete the UV-visual FOS/BL spectra made in 1991. Eta Car, the very massive, most extreme LBV, has surprising sub-arcsec structure near its central star. Spectroscopy of this physically mysterious structure is needed before we can be sure of the nature of Eta Car, and only the HST/FOS can provide the necessary spatial resolution. FOS/BL data covering wavelengths 1200--5500 A were obtained in Cycle 1. Longer wavelengths are needed for many important emission lines and also to make connection with the speckle images observed around 8000 A. Moreover, the high FOS/RD count rates for this object will allow far more spatial information to be obtained than was practical with the FOS/BL detector. We propose to obtain short-exposure (but high S/N) data on a grid of positions about 1 arcsec across. For technical reasons related to the high count rates, Cycle 3 is probably the last realistic opportunity to obtain these data.

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