منابع مشابه
Infrared spectrophotometry of NGC 7023 with ISOCAM
We present spectrophotometric observations of the reflection nebula NGC 7023 obtained with the ISOCAM Circular Variable Filter (CVF) in the spectral range 5.15 to 16.5 m. Maps in the 16 m continuum emission and in the Unidentified Infrared Bands (UIBs) have been obtained. The continuum emission peaks at the dense interface between the surrounding molecular cloud and the inner photodissociated r...
متن کاملPhysical Conditions in the Foreground Gas of Reflection Nebulae : NGC 2023 , vdB 102 , and NGC 7023
Guest Observer, McDonald Observatory, University of Texas at Austin. Visiting Astronomer, Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy, Inc., under cooperative agreement with the National Science Foundation.
متن کاملNear - Infrared Spectroscopy of Molecular Hydrogen Emission in Four Reflection Nebulae : NGC 1333 , NGC 2023 , NGC 2068 , and NGC 7023
We present near-infrared spectroscopy of fluorescent molecular hydrogen (H2) emission from NGC 1333, NGC 2023, NGC 2068, and NGC 7023 and derive the physical properties of the molecular material in these reflection nebulae. Our observations of NGC 2023 and NGC 7023 and the physical parameters we derive for these nebulae are in good agreement with previous studies. Both NGC 1333 and NGC 2068 hav...
متن کاملCi and Co in the Spiral Galaxies Ngc 6946 and M 83
We present J=2–1, J=3–2, J=4–3 CO and 492 GHz [CI] maps as well as J=2–1 and J=3–2 CO measurements of the late type spiral galaxies NGC 6946 and M 83 (NGC 5236). Both galaxies contain a pronounced molecular gas concentration in rapid solid-body rotation within a few hundred parsec from their nucleus. NGC 6946 and M 83 have nearly identical relative intensities in the CO, CO and [CI] transitions...
متن کاملCo and [ci] in Galaxy Centers
Measurements of [CI], J=2–1 13 CO and J=4–3 12 CO emission from quiescent, starburst and active galaxy centers reveal a distinct pattern characterized by relatively strong [CI] emission. The [CI] to 13 CO emission ratio increases with central [CI] luminosity. It is lowest in quiescent and mild starburst centers and highest for strong starburst centers and active nuclei. C • abundances are close...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1998
ISSN: 0004-637X,1538-4357
DOI: 10.1086/305726