To better understand the environment surrounding CO emission clumps in the Keyhole Nebula, we have made images of the region in H2 1-0 S(1) (2.122 um) emission and polycyclic aromatic hydrocarbon (PAH) emission at 3.29 um. Our results show that the H2 and PAH emission regions are morphologically similar, existing as several clumps, all of which correspond to CO emission clumps and dark optical features. The emission confirms the existence of photodissociation regions (PDRs) on the surface of the clumps. By comparing the velocity range of the CO emission with the optical appearance of the H2 and PAH emission, we present a model of the Keyhole Nebula in which the most negative velocity clumps are in front of the ionization region, the clumps ...
Context. We have modelled the abundance distribution and IR emission of the first 3 members of the c...
Herschel PACS and SPIRE images have been obtained of NGC 6720 (the Ring nebula). This is an evolved ...
We derive the molecular properties for a sample of 301 Galactic H II regions including 123 ultra com...
To better understand the environment surrounding CO emission clumps in the Keyhole Nebula, we have m...
Article DOI: 10.1086/345911 Article Stable URL: http://www.jstor.org/stable/10.1086/345911We presen...
We present wide-field, deep narrowband H2, Brγ, Hα, [S ii], [O iii], and broadband I- and K-band ima...
doi: 10.1086/444539We present Hubble Space Telescope NICMOS imaging of the H2 2.12 μm emission in fi...
doi:10.1063/1.2146252Planetary Nebulae (PNe) are major contributors to the enrichment of the interst...
16 pages, 10 PostScript figures. In press in Astronomy & Astrophysics. Uses aa LaTeX macrosWe presen...
The distributions of H_2 1-0 S(l) emission in the young planetary nebulae BD +30°3639 and NGC 7027 s...
We model the molecular emission from cometary knots in planetary nebulae (PNe) using a combination o...
We report the detection, for the first time, of HCO+ (J=1-0) emission as well as marginal CO (J=1-0)...
Aim: We investigate the large-scale structure of the interstellar medium (ISM) around the massive st...
We present maps at high spatial and spectral resolution in emission lines of CCH, c-C3H2, C4H, 12CO...
The mid-infrared (IR) spectrum of almost all objects in the Universe is dominated by a set of strong...
Context. We have modelled the abundance distribution and IR emission of the first 3 members of the c...
Herschel PACS and SPIRE images have been obtained of NGC 6720 (the Ring nebula). This is an evolved ...
We derive the molecular properties for a sample of 301 Galactic H II regions including 123 ultra com...
To better understand the environment surrounding CO emission clumps in the Keyhole Nebula, we have m...
Article DOI: 10.1086/345911 Article Stable URL: http://www.jstor.org/stable/10.1086/345911We presen...
We present wide-field, deep narrowband H2, Brγ, Hα, [S ii], [O iii], and broadband I- and K-band ima...
doi: 10.1086/444539We present Hubble Space Telescope NICMOS imaging of the H2 2.12 μm emission in fi...
doi:10.1063/1.2146252Planetary Nebulae (PNe) are major contributors to the enrichment of the interst...
16 pages, 10 PostScript figures. In press in Astronomy & Astrophysics. Uses aa LaTeX macrosWe presen...
The distributions of H_2 1-0 S(l) emission in the young planetary nebulae BD +30°3639 and NGC 7027 s...
We model the molecular emission from cometary knots in planetary nebulae (PNe) using a combination o...
We report the detection, for the first time, of HCO+ (J=1-0) emission as well as marginal CO (J=1-0)...
Aim: We investigate the large-scale structure of the interstellar medium (ISM) around the massive st...
We present maps at high spatial and spectral resolution in emission lines of CCH, c-C3H2, C4H, 12CO...
The mid-infrared (IR) spectrum of almost all objects in the Universe is dominated by a set of strong...
Context. We have modelled the abundance distribution and IR emission of the first 3 members of the c...
Herschel PACS and SPIRE images have been obtained of NGC 6720 (the Ring nebula). This is an evolved ...
We derive the molecular properties for a sample of 301 Galactic H II regions including 123 ultra com...