Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Garnett, D."'
Publikováno v:
Astrophys.J.637:741-751,2006
We present new spectroscopic observations of 13 H II regions in the Local Group spiral galaxy M33. The regions observed range from 1 to 7 kpc in distance from the nucleus. Of the 13 H II regions observed, the [O III] 4363 Angstrom line was detected i
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510295
Autor:
Garnett, D. R., Dinerstein, H. L.
We present spatially-resolved spectral of O II permitted lines and [O III] forbidden lines in the Ring Nebula NGC 6720. We find significant differences in the spatial distribution of the O II and [O III] lines. The [O III] emission follows the H-beta
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105206
Autor:
Garnett, D. R., Dinerstein, H. L.
We present new observations of O II recombination lines in ten bright planetary nebulae, along with spatially-resolved measurements of O II and [O III] in the Ring nebula NGC 6720, to study the discrepancy between abundances derived from O II recombi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0104145
Autor:
Garnett, D. R., Kobulnicky, H. A.
Publikováno v:
Astrophys.J. 532 (2000) 1192
The age-metallicity relation for F and G dwarf stars in the solar neighborhood, based on the stellar metallicity data of Edvardsson et al. (1993), shows an apparent scatter that is larger than expected considering the uncertainties in metallicities a
Externí odkaz:
http://arxiv.org/abs/astro-ph/9912031
Publikováno v:
Astron.J. 117 (1999) 1285-1291
We report the discovery of small, isolated dust clouds in the Large Magellanic Cloud, which are excellent candidates for counterparts to the Bok globules observed in the Galaxy. We detect these small clouds silhoutted against diffuse H-alpha emission
Externí odkaz:
http://arxiv.org/abs/astro-ph/9902165
Autor:
Garnett, D. R., Shields, G. A., Peimbert, M., Torres-Peimbert, S., Skillman, E. D., Dufour, R. J., Terlevich, E., Terlevich, R. J.
We present measurements of the gas-phase C/O abundance ratio in six H II regions in the spiral galaxies M101 and NGC 2403, based on ultraviolet spectroscopy using the Faint Object Spectrograph on the Hubble Space Telescope. The C/O ratios increase sy
Externí odkaz:
http://arxiv.org/abs/astro-ph/9810026
Publikováno v:
Astrophys.J. 510 (1999) 104
Medium-resolution spectra from 3650 angstroms to 10,000 angstroms are presented for 96 giant H II regions distributed in 20 spiral galaxies. We have calculated two separate grids of photoionization models, adopting single-star atmospheres (Kurucz) an
Externí odkaz:
http://arxiv.org/abs/astro-ph/9809105
Autor:
Calzetti, D., Meurer, G., Bohlin, R., Garnett, D., Kinney, A., Leitherer, C., Storchi-Bergmann, T.
(Abridged) Ultraviolet and optical narrow and broad band images of NGC5253 obtained with the HST WFPC2 are used to derive the properties of the dust distribution and the recent star formation history of this metal-poor dwarf galaxy. Corrections for t
Externí odkaz:
http://arxiv.org/abs/astro-ph/9708056
We present new measurements of the gas-phase C/O abundance ratio in both the NW and SE components of the extremely metal-poor dwarf irregular galaxy I Zw 18, based on ultraviolet spectroscopy of the two H II regions using the Faint Object Spectrograp
Externí odkaz:
http://arxiv.org/abs/astro-ph/9611026
Publikováno v:
Astrophys.J.110:2665,1995
Hubble Space Telescope ultraviolet (UV) images of nine starburst galaxies reveal them to be highly irregular, even after excluding compact sources (clusters and resolved stars). Most (7/9) are found to have a similar intrinsic effective surface brigh
Externí odkaz:
http://arxiv.org/abs/astro-ph/9509038