Hiroyuki Hirashita 1999 ApJ 522 220 doi:10.1086/307621
Hiroyuki Hirashita1
Show affiliationsWe examine dust-to-gas ratio as a function of metallicity for dwarf galaxies (dwarf irregular galaxies [dIrrs] and blue compact dwarf galaxies [BCDGs]). Using a one-zone model and adopting the instantaneous recycling approximation, we prepare a set of basic equations that describes processes of dust formation and destruction in a galaxy. Four terms are included for the processes: dust formation from heavy elements ejected by stellar mass loss, dust destruction in supernova remnants, dust destruction in star-forming regions, and accretion of heavy elements onto preexisting dust grains. Solving the equations, we compare the result with observational data of nearby dIrrs and BCDGs. The solution is consistent with the data within the reasonable ranges of model parameters constrained by previous examinations. This means that the model is successful in understanding the dust amount of nearby galaxies. We also show that the accretion rate of heavy element onto preexisting dust grains is less effective than the condensation of heavy elements.
dust, extinction; galaxies: abundances; galaxies: dwarf; galaxies: evolution; galaxies: ISM; galaxies: spiral
Issue 1 (1999 September 1)
Received 1998 October 19, accepted for publication 1999 April 10
Hiroyuki Hirashita 1999 ApJ 522 220
Kazuya Tada and Mitsuyoshi Onoda 2009 J. Phys. D: Appl. Phys. 42 132001
Z Cao et al 2009 J. Phys. D: Appl. Phys. 42 222003
X. Calmet and H. Fritzsch 2006 Europhys. Lett. 76 1064
Eric Bergshoeff and Antoine Van Proeyen 2001 Class. Quantum Grav. 18 3083
Y. Okazaki et al. 2008 ApJ 681 693
D Vogt and P S Letelier 2004 Class. Quantum Grav. 21 3369
C G Torre 2004 Class. Quantum Grav. 21 L73
Juan Crisóstomo et al 2004 Class. Quantum Grav. 21 2801
Christopher W. Churchill et al. 2003 ApJ 593 203