Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Dinerstein, H. L."'
Autor:
Mashburn, A. L., Sterling, N. C., Madonna, S., Dinerstein, H. L., Roederer, I. U., Geballe, T.
We present near-infrared spectra of ten planetary nebulae (PNe) in the Large and Small Magellanic Clouds (LMC and SMC), acquired with the FIRE and GNIRS spectrometers on the 6.5-m Baade and 8.1-m Gemini South Telescopes, respectively. We detect Se an
Externí odkaz:
http://arxiv.org/abs/1610.03072
The detection of neutron(n)-capture elements in several planetary nebulae (PNe) has provided a new means of investigating s-process nucleosynthesis in low-mass stars. However, a lack of atomic data has inhibited accurate trans-iron element abundance
Externí odkaz:
http://arxiv.org/abs/1505.01162
Autor:
Sterling, N. C., Dinerstein, H. L., Hwang, S., Redfield, S., Aguilar, A., Witthoeft, M. C., Esteves, D., Kilcoyne, A. L. D., Bautista, M., Phaneuf, R., Bilodeau, R. C., Ballance, C. P., McLaughlin, B., Norrington, P. H.
Publikováno v:
Publ.Astron.Soc.Austral.26:339-344,2009
Spectroscopy of planetary nebulae (PNe) provides the means to investigate s-process enrichments of neutron(n)-capture elements that cannot be detected in asymptotic giant branch (AGB) stars. However, accurate abundance determinations of these element
Externí odkaz:
http://arxiv.org/abs/0812.2221
Autor:
Sterling, N. C., Dinerstein, H. L.
We present results from an ongoing survey of the infrared emission lines [Kr III] 2.199 and [Se IV] 2.287 micron in Galactic planetary nebulae (PNe). Krypton and selenium may be produced by slow neutron-capture nucleosynthesis (the ``s-process'') dur
Externí odkaz:
http://arxiv.org/abs/astro-ph/0506250
Publikováno v:
Astrophys.J. 625 (2005) 368-384
[Abridged] We present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the young, compact planetary nebula (PN) SwSt 1 along the line of sight to its central star HD 167362. We detect circumstellar absorption lines from several species a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502321
Autor:
Sterling, N. C., Dinerstein, H. L.
We present results from an ongoing survey of infrared emission lines from the neutron-capture elements Se and Kr in Galactic planetary nebulae (PNe). Se and Kr may be produced in the initial steps of the s-process during the asymptotic giant branch (
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408481
Publikováno v:
Astrophys.J.578:L55-L58,2002
We report the discovery of Ge III $\lambda$1088.46 in the planetary nebulae (PNe) SwSt 1, BD+30$^{\rm o}$3639, NGC 3132, and IC 4593, observed with the Far Ultraviolet Spectroscopic Explorer. This is the first astronomical detection of this line and
Externí odkaz:
http://arxiv.org/abs/astro-ph/0208516
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
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