ISOPHOT far-infrared photometry of NGC 3079

Details ISOPHOT far-infrared photometry of NGC 3079 ISOPHOT far-infrared photometry of NGC 3079

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...391..911k&link_type=abstract

Astronomy and Astrophysics, v.391, p.911-915 (2002)

Astronomy and Astrophysics

Astrophysics

5

Radiation Mechanisms: Thermal, Astronomical Data Bases: Iso, Data Archive, Infrared: Galaxies, Galaxies: Individual: Ngc 3079, Galaxies: Photometry

Scientific paper

FIR photometry (from 15 mu m to 200 mu m) of NGC 3079 which is resolved by ISOPHOT at 60 mu m is presented. With the assumption of an unresolved core plus an extended disk component, good consistency with IRAS and SCUBA data is found. The SED of the total flux between 60 mu m and the submm can be modelled by the superposition of three dust components with temperatures of 32 K, 20 K and 12 K. The emission of the extended disk component is 1/3 of the unresolved core component in the 60-180 mu m range, from 200 mu m onwards its relative contribution increases. The resulting dust mass of 3.8*E7 Msun is consistent with a total gas-to-dust mass ratio of 200, close to the canonical value found for the Milky Way. These results demonstrate an appropriate way to disentangle and characterize the main dust components by combining ISOPHOT FIR data from the ISO Data Archive with submm data from SCUBA. Based on observations with the Infrared Space Observatory ISO. ISO is an ESA project with instruments funded by ESA Member States (especially the PI countries France, Germany, The Netherlands and the UK) and with the participation of ISAS and NASA.

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