Details

Autor(en) / Beteiligte

• CALAPA, MARIE D
• Calzetti, Daniela
• Draine, Bruce T
• Boquien, Mederic
• Kramer, Carsten
• XILOURIS, MANOLIS
• Verley, Simon
• Braine, Jonathan
• RELANO, MONICA
• van der Werf, Paul
• Israel, Frank
• HERMELO, ISRAEL
• Albrecht, Marcus

Titel

THE HEATING OF MID-INFRARED DUST IN THE NEARBY GALAXY M33: A TESTBED FOR TRACING GALAXY EVOLUTION

Ist Teil von

• The Astrophysical journal, 2014-04, Vol.784 (2), p.1-11

Ort / Verlag

United States: American Astronomical Society

Erscheinungsjahr

2014

Quelle

EZB Free E-Journals

Beschreibungen/Notizen

• Infrared emission is an invaluable tool for quantifying star formation in galaxies. Because the 8 [mu]m polycyclic aromatic hydrocarbon (PAH) emission has been found to correlate with other well-known star formation tracers, it has widely been used as a star formation rate (SFR) tracer. There are, however, studies that challenge the accuracy and reliability of the 8 [mu]m emission as a SFR tracer. Our study, part of the Herschel (Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA) M33 Extended Survey (HERM33ES) open time key program, aims at addressing this issue by analyzing the infrared emission from the nearby spiral galaxy M33 at die high spatial scale of ~75 pc. We find that the majority of the 8 [mu]m emission is fully consistent with heating by the diffuse interstellar medium, similar to what recently determined for the dust emission in M31 by Draine et al.