SIMBAD references

2019ApJ...884..136X - Astrophys. J., 884, 136-136 (2019/October-3)

A new calibration of star formation rate in galaxies based on polycyclic aromatic hydrocarbon emission.

XIE Y. and HO L.C.

Abstract (from CDS):

Polycyclic aromatic hydrocarbon (PAH) emission has long been proposed to be a potential star formation rate indicator, as it arises from the photodissociation region bordering the Stromgren sphere of young, massive stars. We apply a recently developed technique of mid-infrared spectral decomposition to obtain a uniform set of PAH measurements from Spitzer low-resolution spectra of a large sample of star-forming galaxies spanning a wide range in stellar mass (M* ≃ 106-1011.4 M) and star formation rate (∼0.1-2000 M yr–1). High-resolution spectra are also analyzed to measure [Ne II] 12.8 µm and [Ne III] 15.6 µm, which effectively trace the Lyman continuum. We present a new relation between PAH luminosity and star formation rate based on the [Ne II] and [Ne III] lines. Calibrations are given for the integrated 5-15 µm PAH emission, the individual features at 6.2, 7.7, 8.6, and 11.3 µm, as well as several mid-infrared bandpasses sensitive to PAH. We confirm that PAH emission is suppressed in low-mass dwarf galaxies, and we discuss the possible physical origin of this effect.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dust, extinction - galaxies: dwarf - galaxies: formation - galaxies: starburst

VizieR on-line data: <Available at CDS (J/ApJ/884/136): table1.dat table2.dat>

Simbad objects: 229

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