74 citations · 650 across the 27 of their papers we have counts for
28 papers
Sub-kpc scale gas density histograms of the nearby barred spiral galaxy M83: Multi-component molecular gas structure reflecting the galactic environment
Ren Matsusaka, Toshihiro Handa, Fumi Egusa +8
We investigate the sub-kiloparsec (sub-kpc) molecular ISM structure and its relation to the galactic environment and star formation in the barred spiral galaxy M83 (NGC 5236). We e…
Galactic structure dependence of cloud-cloud collisions driven star formation in the barred galaxy NGC 3627
Fumiya Maeda, Kouji Ohta, Fumi Egusa +4
While cloud-cloud collisions (CCCs) have been proposed as a mechanism for triggering massive star formation, it is suggested that higher collision velocities () and lo…
Sub-kpc scale gas density histogram of the Galactic molecular gas: a new statistical method to characterise galactic-scale gas structures
Ren Matsusaka, Toshihiro Handa, Yusuke Fujimoto +6
To understand physical properties of the interstellar medium (ISM) on various scales, we investigate it at parsec resolution on the kiloparsec scale. Here, we report on the sub-kpc…
Efficient radial migration by giant molecular clouds in the first several hundred Myr after the stellar birth
Yusuke Fujimoto, Shu-ichiro Inutsuka, Junichi Baba
Stars in the Galactic disc, including the Solar system, have deviated from their birth orbits and have experienced radial mixing and vertical heating. By performing hydrodynamical…
Statistical Study of the Star Formation Efficiency in Bars: Is Star Formation Suppressed in Gas-Rich Bars?
Fumiya Maeda, Fumi Egusa, Kouji Ohta +2
The dependence of star formation efficiency (SFE) on galactic structures, especially whether the SFE in the bar region is lower than those in the other regions, has recently been d…
Short-Lived Radionuclides in Meteorites and the Sun's Birth Environment
Steven J. Desch, Edward D. Young, Emilie T. Dunham +2
The solar nebula contained a number of short-lived radionuclides (SLRs) with half-lives of tens of Myr or less, comparable to the timescales for formation of protostars and protopl…
CO(2-1)/CO(1-0) line ratio on 100 parsec scale in the nearby barred galaxy NGC1300
Fumiya Maeda, Fumi Egusa, Kouji Ohta +3
CO(2-1) emission is often used as a tracer of the giant molecular clouds (GMCs) as an alternative to CO(1-0) emission in recent years. Therefore, understanding the environmental de…
Momentum feedback from marginally-resolved HII regions in isolated disc galaxies
Sarah M. R. Jeffreson, Mark R. Krumholz, Yusuke Fujimoto +4
We present a novel, physically-motivated sub-grid model for HII region feedback within the moving mesh code Arepo, accounting for both the radiation pressure-driven and thermal exp…
A scaling relation for the molecular cloud lifetime in Milky Way-like galaxies
Sarah M. R. Jeffreson, Benjamin W. Keller, Andrew J. Winter +4
We study the time evolution of molecular clouds across three Milky Way-like isolated disc galaxy simulations at a temporal resolution of 1 Myr, and at a range of spatial resolution…
Connection among environment, cloud-cloud collision speed, and star formation activity in the strongly barred galaxy NGC1300
Fumiya Maeda, Kouji Ohta, Yusuke Fujimoto +1
Cloud-cloud collision (CCC) has been suggested as a mechanism to induce massive star formation. Recent simulations suggest that a CCC speed is different among galactic-scale enviro…
An uncertainty principle for star formation -- V. The influence of dust extinction on star formation rate tracer lifetimes and the inferred molecular cloud lifecycle
Daniel T. Haydon, Yusuke Fujimoto, Mélanie Chevance +3
Recent observational studies aiming to quantify the molecular cloud lifecycle require the use of known 'reference time-scales' to turn the relative durations of different phases of…
Distribution and kinematics of 26Al in the Galactic disc
Yusuke Fujimoto, Mark R. Krumholz, Shu-ichiro Inutsuka
26Al is a short-lived radioactive isotope thought to be injected into the interstellar medium (ISM) by massive stellar winds and supernovae. However, all-sky maps of 26Al emission…
Formation and evolution of the local interstellar environment: combined constraints from nucleosynthetic and X-ray data
Yusuke Fujimoto, Mark R. Krumholz, Shu-ichiro Inutsuka +2
Several observations suggest that the Solar system has been located in a region affected by massive stellar feedback for at least a few Myr; these include detection of live $^{60}\…
A large amount of diffuse molecular gases in the bar of the strongly barred galaxy NGC1300: Cause of the low star formation efficiency
Fumiya Maeda, Kouji Ohta, Yusuke Fujimoto +2
In many barred galaxies, star formation efficiency (SFE) in the bar is lower than those in the arm and bar-end, and its cause has still not been clear. Focusing on the strongly bar…
Fast cloud-cloud collisions in a strongly barred galaxy: Suppression of massive star formation
Yusuke Fujimoto, Fumiya Maeda, Asao Habe +1
Recent galaxy observations show that star formation activity changes depending on galactic environments. In order to understand the diversity of galactic-scale star formation, it i…
Properties of giant molecular clouds in the strongly barred galaxy NGC1300
Fumiya Maeda, Kouji Ohta, Yusuke Fujimoto +1
Star formation activity depends on galactic-scale environments. To understand the variations in star formation activity, comparing the properties of giant molecular clouds (GMCs) a…
Comparing simulated Al maps to gamma-ray measurements
Moritz M. M. Pleintinger, Thomas Siegert, Roland Diehl +4
Context. The diffuse gamma-ray emission of at 1.8 MeV reflects ongoing nucleosynthesis in the Milky Way, and traces massive-star feedback in the interstellar medium…
A fundamental test for stellar feedback recipes in galaxy simulations
Yusuke Fujimoto, Mélanie Chevance, Daniel T. Haydon +2
Direct comparisons between galaxy simulations and observations that both reach scales < 100 pc are strong tools to investigate the cloud-scale physics of star formation and feedbac…
The changing GMC population in galaxy interactions
Alex R. Pettitt, Fumi Egusa, Clare L. Dobbs +3
With the advent of modern observational efforts providing extensive giant molecular cloud catalogues, understanding the evolution of such clouds in a galactic context is of prime i…
Mixing of metals during star cluster formation: statistics and implications for chemical tagging
Lucia Armillotta, Mark R. Krumholz, Yusuke Fujimoto
Ongoing surveys are in the process of measuring the chemical abundances in large numbers of stars, with the ultimate goal of reconstructing the formation history of the Milky Way u…
Large velocity dispersion of molecular gas in bars of strongly barred galaxies, NGC 1300 and NGC 5383
Fumiya Maeda, Kouji Ohta, Yusuke Fujimoto +2
We carried out CO(J = 1 -0) observations toward bar and arm regions of strongly barred galaxies, NGC 1300 and NGC 5383, with the Nobeyama 45-m radio telescope (beamsize of 1…
Short-lived radioisotopes in meteorites from Galactic-scale correlated star formation
Yusuke Fujimoto, Mark R. Krumholz, Shogo Tachibana
Meteoritic evidence shows that the Solar system at birth contained significant quantities of short-lived radioisotopes (SLRs) such as 60Fe and 26Al (with half-lives of 2.6 and 0.7…
GMC Evolution in a Barred Spiral Galaxy with Star Formation and Thermal Feedback
Yusuke Fujimoto, Greg L. Bryan, Elizabeth J. Tasker +2
We explore the impact of star formation and thermal stellar feedback on the giant molecular cloud (GMC) population forming in a M83-type barred spiral galaxy. We compare three high…
Effects of Galactic Disc Inclination and Resolution on Observed GMC Properties and Larson's Scaling Relations
Hsi-An Pan, Yusuke Fujimoto, Elizabeth J. Tasker +4
With ALMA making it possible to resolve giant molecular clouds (GMCs) in other galaxies, it is becoming necessary to quantify the observational bias on measured GMC properties. Usi…