Bibcode
Buckalew, Brent; Dufour, Reginald; Rubin, Robert; Esteban, Cesar
Referencia bibliográfica
NOAO Proposal ID #1999A-0282
Advertised on:
2
1999
Número de citas
0
Número de citas referidas
0
Descripción
We are continuing a comprehensive systematic study of the properties of
Wolf-Rayet Galaxies (WRGs) based on data from ground and space
observatories. In this proposal we request time on the KPNO 0.9m and
2.1m telescopes to undertake CCD imagery and spectroscopy of a group of
WRGs. Our basic aim is threefold: (a) identify and characterize the
properties of WRGs, (b) evaluate the effects that the enhanced
populations of Wolf-Rayet stars (WRS) have on the ISM, and (c) determine
the phase's time-scale and why these systems are seen in this current
stage. We propose to obtain CCD imagery on the 0.9m to study the
morphology and distribution of the ionized gas, and to locate the Wolf-
Rayet stellar populations (using their He II (lambda)4686 emission).
Then, we propose to follow-up with spectroscopy on the 2.1m to determine
physical conditions in the local ISM (T_e, N_e, abundances, etc.) around
the WRS, how these spectral and physical properties depend on the
presence of WRS, the numbers and influence of the WRS in the OB
associations of the galaxies, and if the winds and radiation field of
the Wolf-Rayet population affect the magnitude of temperature
fluctuations in the surrounding H II regions compared to ``normal'' OB
associations.