107 citations · 336 across the 10 of their papers we have counts for
9 papers
Ion-Neutral Drift Velocity as a Diagnostic of Dust Growth and Magnetic Field in Star-Forming Environments
Haruka Fukihara, Yusuke Tsukamoto, Hiroyuki Hirashita +2
Recent observations have revealed that the ion-neutral drift velocity in star-forming molecular clouds and dense cores is on the order of 100 m s^-1. Theoretical studies have shown…
CO-to-H conversion factor and grain size distribution through the analysis of - relation
I-Da Chiang, Hiroyuki Hirashita, Jeremy Chastenet +5
The CO-to-H conversion factor () is expected to vary with dust abundance and grain size distribution through the efficiency of shielding gas from CO-dissociation…
JWST MIRI and NIRCam observations of NGC 891 and its circumgalactic medium
Jérémy Chastenet, Ilse De Looze, Monica Relaño +37
We present new JWST observations of the nearby, prototypical edge-on, spiral galaxy NGC 891. The northern half of the disk was observed with NIRCam in its F150W and F277W filters.…
Accurate Simultaneous Constraints on the Dust Mass, Temperature and Emissivity Index of a Galaxy at Redshift 7.31
Hiddo Algera, Hanae Inami, Ilse De Looze +21
We present new multi-frequency ALMA continuum observations of the massive [], UV-luminous [] $z=7.31…
The fate of the interstellar medium in early-type galaxies. I. First direct measurement of the timescale of dust removal
Michał J. Michałowski, J. Hjorth, C. Gall +12
An important aspect of quenching star formation is the removal of the cold interstellar medium (ISM; non-ionised gas and dust) from a galaxy. In addition, dust grains can be destro…
The infrared-dark dust content of high redshift galaxies
A. Ferrara, H. Hirashita, M. Ouchi +1
We present a theoretical model aimed at explaining the IRX- relation for high redshift (z >5) galaxies. Recent observations (Capak+2015; Bouwens+2016) have shown that early Lyma…
Molecular hydrogen in damped Ly-alpha systems: clues to interstellar physics at high-redshift
H. Hirashita, A. Ferrara
In order to interpret H2 (molecular hydrogen) quasar absorption line observations of damped Ly-alpha systems (DLAs) and sub-DLAs, we model their H2 abundance as a function of dust-…
Effects of dust grains on early galaxy evolution
H. Hirashita, A. Ferrara
Stars form out of molecular gas and supply dust grains during their last evolutionary stages; in turn hydrogen molecules (H2) are produced more efficiently on dust grains. Therefor…
Dust and hydrogen molecules in the extremely metal-poor dwarf galaxy SBS 0335-052
H. Hirashita, L. K. Hunt, A. Ferrara
During the early stages of galaxy evolution, the metallicity is generally low and nearby metal-poor star-forming galaxies may provide templates for primordial star formation. In pa…