Paper: astro-ph/0601585
Date: Thu, 26 Jan 2006 02:33:09 GMT (803kb)
Title: Morpho-kinematic modeling of gaseous nebulae with SHAPE
Authors: Wolfgang Steffen, Jose Alberto Lopez
Comments: 7 pages, 5 figures, accepted for publication in RevMexAA, some
figures are low resolution for packing adequate for the arXive (see
http://www.astrosen.unam.mx/~wsteffen for highres version.)
\\
We present a powerful new tool to analyse and disentangle the 3-D geometry
and kinematic structure of gaseous nebulae. The method consists in combining
commercially available digital animation software to simulate the 3-D structure
and expansion pattern of the nebula with a dedicated, purpose built rendering
software that produces the final images and long slit spectra which are
compared to the real data. We show results for the complex planetary nebulae
NGC 6369 and Abell 30 based on long slit spectra obtained at the San Pedro
Martir observatory.
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http://arXiv.org/abs/astro-ph/0601585 , 803kb)
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Paper: astro-ph/0601586
Date: Thu, 26 Jan 2006 17:52:16 GMT (207kb)
Title: Far Ultraviolet Spectral Images of the Vela Supernova Remnant
Authors: K. Nishikida, J. Edelstein, E. J. Korpela, R. Sankrit, W. M.
Feuerstein, K. W. Min, J-H. Shinn, D-H. Lee, I-S. Yuk, H. Jin, K-I. Seon
Comments: Accepted by ApJL
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We present far-ultraviolet (FUV) spectral-imaging observations of the Vela
supernova remnant (SNR), obtained with the Spectroscopy of Plasma Evolution
from Astrophysical Radiation (SPEAR) instrument, also known as FIMS. The Vela
SNR extends 8 degrees in the FUV and its global spectra are dominated by
shock-induced emission lines. We find that the global FUV line luminosities can
exceed the 0.1-2.5 keV soft X-ray luminosity by an order of magnitude. The
global O VI:C III ratio shows that the Vela SNR has a relatively large fraction
of slower shocks compared with the Cygnus Loop.
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http://arXiv.org/abs/astro-ph/0601586 , 207kb)
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Paper: astro-ph/0601587
Date: Thu, 26 Jan 2006 05:12:50 GMT (417kb)
Title: The Spectroscopy of Plasma Evolution from Astrophysical Radiation
Mission
Authors: J. Edelstein, K. W. Min, W. Han, E. J. Korpela, K. Nishikida, B.Y.
Welsh, C. Heiles, J. Adolfo, M. Bowen, W.M. Feuerstein, K. McKee, J.-T. Lim,
K. Ryu, J.-H. Shinn, U.-W. Nam, J.-H. Park, I.-S. Yuk, H. Jin, K.I Seon, D.H.
Lee, E. Sim
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The Spectroscopy of Plasma Evolution from Astrophysical Radiation (or the
Far-ultraviolet Imaging Spectrograph) instruments, flown aboard the STSAT-1
satellite mission, have provided the first large-area spectral mapping of the
cosmic far ultraviolet (FUV, lambda 900-1750 Ang) background. We observe
diffuse radiation from hot (10^4 to 10^6 K) and ionized plasmas, molecular
hydrogen, and dust scattered starlight. These data provide for the
unprecedented detection and discovery of spectral emission from a variety of
interstellar environments, including the general medium, molecular clouds,
supernova remnants, and super-bubbles. We describe the mission and its data,
present an overview of the diffuse FUV sky's appearance and spectrum, and
introduce the scientific findings detailed later in this volume.
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http://arXiv.org/abs/astro-ph/0601587 , 417kb)
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Paper: astro-ph/0601588
Date: Thu, 26 Jan 2006 06:01:05 GMT (133kb)
Title: The SPEAR Instrument and On-Orbit Performance
Authors: Jerry Edelstein, Eric Korpela, Joe Adolfo, Mark Bowen, Michael
Feuerstein, Jeffrey Hull, Sharon Jelinsky, Kaori Nishikida, Ken McKee, Peter
Berg, Ray Chung, Jorg Fischer, Kyoung-Wook Min, Seung-Han Oh, Jin-Guen Rhee,
Kwangsun Ryu, Jong-Ho Shinn, Wonyong Han, Ho Jin, Dae-Hee Lee, Uk-Won Nam,
Jang-Hyun Park, Kwang-Il Seon, In-Soo Yuk
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The SPEAR (or 'FIMS') instrumentation has been used to conduct the first
large-scale spectral mapping of diffuse cosmic far ultraviolet (FUV, 900-1750
AA) emission, including important diagnostics of interstellar hot (10^4 K -
10^6 K) and photoionized plasmas, H_2, and dust scattered starlight. The
instrumentation's performance has allowed for the unprecedented detection of
astrophysical diffuse far UV emission lines. A spectral resolution of 550 and
an imaging resolution of 5' is achieved on-orbit in the Short (900 - 1175 AA)
and Long (1335 - 1750 AA) bandpass channels within their respective 7.4 deg x
4.3' and 4.0 deg x 4.6' fields of view. We describe the SPEAR imaging
spectrographs, their performance, and the nature and handling of their data.
\\ (
http://arXiv.org/abs/astro-ph/0601588 , 133kb)
Paper: astro-ph/0601590
Date: Thu, 26 Jan 2006 08:40:27 GMT (875kb)
Title: Molecular Hydrogen Fluorescence in the Eridanus Superbubble
Authors: K. Ryu, K. W. Min, J. W. Park, D. H. Lee, W. Han, U. W. Nam, J. H.
Park, J. Edelstein, E. J. Korpela, K. Nishikida, and E. F. van Dishoeck
Comments: 10 pages, 3 figures, apjl accepted
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The first FUV (lambda lambda 1350-1750 A) spectral imaging observations of
the Eridanus superbubble, obtained with the SPEAR/FIMS mission, have revealed
distinct fluorescent emission from molecular hydrogen. In this study, the
observed emission features were compared with those from a photo-dissociation
region model with assumed illuminating stellar fields. The result showed rather
high line ratios of I_{1580}/I_{1610}, which may imply the existence of
high-temperature molecular clouds in the region. The H_2 fluorescence intensity
showed a proportional correlation with H-alpha emission, indicating that the
fluorescence and the recombination emission have similar physical origins.
\\ (
http://arXiv.org/abs/astro-ph/0601590 , 875kb)