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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 04003naa a2200457 4500 | |
| 001 | oai:research.chalmers.se:d3eb3909-ab38-439a-a452-0d8da8b62d07 | |
| 003 | SwePub | |
| 008 | 171008s2009 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://doi.org/10.1051/0004-6361:2008103942 DOI |
| 024 | 7 | a https://research.chalmers.se/publication/895012 URI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Aalto, Susanne,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)saalto |
| 245 | 1 0 | a High-resolution HNC 3-2 SMA observations of Arp 220 |
| 264 | c 2008-11-20 | |
| 264 | 1 | b EDP Sciences,c 2009 |
| 338 | a electronic2 rdacarrier | |
| 520 | a Aims. We study the properties of the nuclear molecular gas of the ultra luminous merger Arp 220 and effects of the nuclear source on gas excitation and chemistry. Specifically, our aim is to investigate the spatial location of the luminous HNC 3-2 line emission and address the underlying cause of its unusual brightness.Methods. We present high resolution observations of HNC J=3-2 with the submillimeter array (SMA).Results. We find luminous HNC 3-2 line emission in the western part of Arp 220, centred on the western nucleus, while the eastern side of the merger shows relatively faint emission. A bright (36 K at $0\hbox{$.\!\!^{\prime\prime}$ }4$ resolution), narrow (60 ${\rm km~s}^$) emission feature emerges from the western nucleus, superposed on a broader spectral component. A possible explanation is weak maser emission through line-of-sight amplification of the background continuum source. There is also a more extended HNC 3-2 emission feature north and south of the nucleus. This feature resembles the bipolar OH maser morphology around the western nucleus. Substantial HNC abundances are required to explain the bright line emission from this warm environment - even when the high gas column density towards the western nucleus is taken into account. We discuss this briefly in the context of an X-ray affected chemistry and radiative excitation.Conclusions. The luminous and possibly amplified HNC emission of the western nucleus of the Arp 220 merger reflects the unusual, and perhaps transient environment of the starburst/AGN activity there. The faint HNC line emission towards Arp 220-east reveals a real difference in physical conditions between the two merger nuclei. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a radio lines: ISM | |
| 653 | a galaxies: evolution | |
| 653 | a ISM: molecules | |
| 653 | a galaxies: active | |
| 653 | a galaxies: individual: Arp 220 | |
| 653 | a galaxies: starburst | |
| 700 | 1 | a Wilner, D.J.u Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Spaans, M.4 aut |
| 700 | 1 | a Wiedner, M.C.u Universität zu Köln,University of Cologne4 aut |
| 700 | 1 | a Sakamoto, K.u National Astronomical Observatory of Japan,Academia Sinica Taiwan,Harvard-Smithsonian Center for Astrophysics4 aut |
| 700 | 1 | a Black, John H,d 1949u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)jblack |
| 700 | 1 | a Caldas, M.u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)manuel |
| 710 | 2 | a Chalmers tekniska högskolab Harvard-Smithsonian Center for Astrophysics4 org |
| 773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 493:2, s. 481-487q 493:2<481-487x 0004-6361x 1432-0746 |
| 856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/89501/local_89501.pdfx primaryx freey FULLTEXT |
| 856 | 4 | u https://www.aanda.org/articles/aa/pdf/2009/02/aa10394-08.pdf |
| 856 | 4 8 | u https://doi.org/10.1051/0004-6361:200810394 |
| 856 | 4 8 | u https://research.chalmers.se/publication/89501 |
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