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Exploring the molecular chemistry and excitation in obscured LIRGs: An ALMA mm-wave spectral scan of NGC 4418

Francesco Costagliola (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik) ; K. Sakamoto ; Sebastien Muller (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium) ; S. Martín ; Susanne Aalto (Institutionen för rymd- och geovetenskap, Radioastronomi och astrofysik ; Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium)
EAS Publications Series: 6th Zermatt Symposium on Conditions and Impact of Star Formation: From Lab to Space 2015; 3m-KOSMA Telescope on GornergratZermatt; Switzerland; 7 September 2015 through 11 September 2015 (1633-4760). Vol. 75-76 (2016), p. 67-68.
[Konferensbidrag, refereegranskat]

The compact, obscured nuclei (CON) of luminous infrared galaxies (LIRG) combine large molecular columns with intense infrared (IR), ultra-violet (UV), and X-radiation and represent ideal laboratories for the study of the chemistry of the interstellar medium (ISM) under extreme conditions. Here we present the first ALMA wide-band spectral scan of a dusty LIRG, the CON NGC 4418. We derive molecular abundances and compare them with other Galactic and extragalactic sources. Our spectral scan confirms that the chemical complexity in the nucleus of NGC 4418 is one of the highest ever observed outside our Galaxy. We suggest that the galaxy may be a template for a new kind of chemistry and excitation, typical of CON.



Denna post skapades 2016-07-11. Senast ändrad 2016-08-12.
CPL Pubid: 239233

 

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