Exploring the molecular chemistry and excitation in obscured LIRGs: An ALMA mm-wave spectral scan of NGC 4418
Paper in proceeding, 2016
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.
Author
Francesco Costagliola
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
K. Sakamoto
Institute of Astrophysics and Astronomy, Academia Sinica Taiwan
Sebastien Muller
Chalmers, Earth and Space Sciences, Onsala Space Observatory
S. Martín
IRAM Institut de RadioAstronomie Millimetrique
Susanne Aalto
Chalmers, Earth and Space Sciences, Onsala Space Observatory
Chalmers, Earth and Space Sciences, Radio Astronomy and Astrophysics
EAS Publications Series
1633-4760 (ISSN) 1638-1963 (eISSN)
Vol. 75-76 67-68978-275982022-1 (ISBN)
Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
DOI
10.1051/eas/1575011
ISBN
978-275982022-1