2024-03-29T12:30:27Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02002688
2023-01-16T05:08:09Z
336:695:696
Three-dimensional dust geometry of the LMC H i ridge region as revealed by the IRSF/SIRIUS survey
Furuta, Takuya
Kaneda, Hidehiro
Kokusho, Takuma
Nakajima, Yasushi
Fukui, Yasuo
Tsuge, Kisetsu
(galaxies:) Magellanic Clouds
infrared: ISM
(ISM:) dust
extinction
ISM: structure
We present a new method to evaluate the dust extinction (AV) along the line of sight using the InfraRed Survey Facility (IRSF) near-infrared (NIR) data of the Large Magellanic Cloud (LMC) H i ridge region. In our method, we estimate an AV value for each star from the NIR color excess and sort them from bluer to redder in each line of sight. Using the percentile values of the sorted AV, we construct a new three-dimensional AV map. We compare the resultant AV map with the total hydrogen column density N(H) traced by velocity-resolved H i and CO observations. In the LMC H i ridge region, Fukui et al. (2017, PASJ, 69, L5) found two velocity components and an intermediate velocity one bridging them. Comparing our three-dimensional AV maps with N(H) maps at the different velocities, we find that the dust geometry is consistent with the scenario of ongoing gas collision between the two velocities as suggested in the previous study. In addition, we find a difference by a factor of 2 in AV/N(H) between the two velocity components, which suggests that inflow gas from the Small Magellanic Clouds (SMC) is mixed in this region. Overall, our results support triggered star formation in 30 Doradus due to the large-scale gas collision caused by tidal interaction between the LMC and the SMC.
journal article
Oxford University Press
2021-08
application/pdf
Publications of the Astronomical Society of Japan
4
73
864
879
0004-6264
https://nagoya.repo.nii.ac.jp/record/2002688/files/2105_05421.pdf
eng
https://doi.org/10.1093/pasj/psab052
This is a pre-copyedited, author-produced version of an article accepted for publication in [Publications of the Astronomical Society of Japan] following peer review. The version of record [Takuya Furuta, Hidehiro Kaneda, Takuma Kokusho, Yasushi Nakajima, Yasuo Fukui, Kisetsu Tsuge, Three-dimensional dust geometry of the LMC H i ridge region as revealed by the IRSF/SIRIUS survey, Publications of the Astronomical Society of Japan, Volume 73, Issue 4, August 2021, Pages 864–879, https://doi.org/10.1093/pasj/psab052] is available online at: https://doi.org/10.1093/pasj/psab052.