Nuclear Formaldehyde Absorption in NGC 253

Details Nuclear Formaldehyde Absorption in NGC 253 Nuclear Formaldehyde Absorption in NGC 253

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...491..134b&link_type=abstract

Astrophysical Journal v.491, p.134

Astronomy and Astrophysics

Astronomy

5

Galaxies: Ism, Galaxies: Nuclei, Galaxies: Individual Ngc Number: Ngc 253, Ism: Molecules

Scientific paper

The molecular structure observed in the lambda = 6 cm K-doublet H2CO (formaldehyde) transition against the nucleus of NGC 253 forms an integral part of a hierarchy of structures of its nuclear region. Two distinct nuclear disk components are seen in the formaldehyde absorption data: an outer disk, also seen in other molecular tracers, and a rapidly rotating compact inner disk. Available data for the nuclear region indicates a warped edge-on inner disk structure containing prominent supernova remnants and a collimated outflow oriented roughly perpendicular to the plane of the disk. No 6 cm formaldehyde emission is found in the nucleus of NGC 253.

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