Publications, Presentations

Publications

As the first author

1. Yajima, Y. & Sorai, K., "Key factor on molecular gas properties and star formation by decomposition of CO emission in Maffei 2", 2022, submitted to PASJ

2. Yajima, Y., Sorai, K., Miyamoto, Y., Muraoka, K., Kuno, N., Kaneko, H., Takeuchi, T. T., Yasuda, A., Tanaka, T., Morokuma-Matsui, K., & Kobayashi, I. N. M.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING). IX. 12CO(J = 2-1)/12CO(J = 1-0) line ratio on kiloparsec scales", 2021, PASJ, 73, 257-285
   (ADS)

3. Yajima, Y., Sorai, K., Kuno, N., Muraoka, K., Miyamoto, Y., Kaneko, H., Nakanishi, H., Nakai, N., Tanaka, T., Sato, Y., Salak, D., Morokuma-Matsui, K., Matsumoto, N., Pan, H.-A., Noma, Y., Takeuchi, T. T., Yoda, M., Kuroda, M., Yasuda, A., Oi, N., Shibata, S., Seta, M., Watanabe, Y., Kita, S., Komatsuzaki, R., Kajikawa, A., & Yashima, Y.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING). III. Dynamical effect on molecular gas density and star formation in the barred spiral galaxy NGC 4303", 2019, PASJ, 71, S13
   (ADS)

As a co-author

1. Morokuma-Matsui, K., Sorai, K., Sato, Y., Kuno, N., Takeuchi, T. T., Salak, D., Miyamoto, Y., Yajima, Y., Muraoka, K., & Kaneko, H.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING). X. Physical conditions of molecular gas and the local SFR-mass relation", 2020, PASJ, 72, 90
   (ADS)

2. Salak, D., Noma, Y., Sorai, K., Miyamoto, Y., Kuno, N., Pettitt, R. A., Kaneko, H., Tanaka, T., Yasuda, A., Kita, S., Yajima, Y., Shibata, S., Nakai, N., Seta, M., Muraoka, K., Kuroda, M., Nakanishi, H., Takeuchi, T. T., Yoda, M., Morokuma-Matsui, K., Watanabe, Y., Matsumoto, N., Oi, N., Pan, H.-A., Kajikawa, A., Yashima, Y., & Komatsuzaki, R.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING). VII. Fourier decomposition of molecular gas velocity fields and bar pattern speed", 2019, PASJ, 71, S16
   (ADS)

3. Muraoka, K., Sorai, K., Miyamoto, Y., Yoda, M., Morokuma-Matsui, K., Kobayashi, I. N. M., Kuroda, M., Kaneko, H., Kuno, H., Takeuchi, T. T., Nakanishi, H., Watanabe, Y., Tanaka, T., Yasuda, A., Yajima, Y., Shibata, S., Salak, D., Matsumoto, N., Noma, Y., Kita, S., Komatsuzaki, R., Kajikawa, A., Yashima, Y., Espada, D., Pan, H.-A., Oi, N., Seta, M., & Nakai, N.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING): VI. Radial variations in star formation efficiency", 2019, PASJ, 71, S15
   (ADS)

4. Sorai, K., Kuno, N., Muraoka, K., Miyamoto, Y., Kaneko, H., Nakanishi, H., Nakai, N., Yanagitani, K., Tanaka, T., Sato, Y., Salak, D., Umei, M., Morokuma-Matsui, K., Matsumoto, N., Ueno, S., Pan, H.-A., Noma, Y., Takeuchi, T. T., Yoda, M., Kuroda, M., Yasuda, A., Yajima, Y., Oi, N., Shibata, S., Seta, M., Watanabe, Y., Kita, S., Komatsuzaki, R., Kajikawa, A., Yashima, Y., Cooray, S., Baji, H., Segawa, Y., Tashiro, T., Takeda, M., Kishida, N., Hatakeyama, T., Tomiyasu, Y., & Saita, C.,
   "CO Multi-line Imaging of Nearby Galaxies (COMING): IV. Overview of the project", 2019, PASJ, 71, S14
   (ADS)

Presentations in International Conferences and Workshops

1. Yajima, Y., Sorai, K., "Significant factor in molecular gas properties and star formation by decomposition of CO emission in Maffei 2", Galaxy Evolution Workshop 2021, NAOJ Mitaka, February 2022 (oral)

2. Yajima, Y., Sorai, K., Salak, D., "Properties of giant molecular clouds in the starburst galaxy NGC 1808", Galaxy Evolution Workshop 2021, NAOJ Mitaka, February 2022 (poster)

3. Yajima, Y., Sorai, K., "Effective factor in molecular gas properties and star formation by decomposition of CO emission in the barred spiral galaxy Maffei 2", ALMA/45m/ASTE Users Meeting 2021, online, December 2021 (poster)

4. Yajima, Y., Sorai, K., "Nobeyama Science Highlight I : Properties and dynamics of molecular gas in Maffei 2", ALMA/45m/ASTE Users Meeting FY2020, online, January 2021 (invited, oral)

5. Yajima, Y., Sorai, K., and COMING members, "Nobeyama Science Highlights 3: COMING: 12CO(J=2-1)/12CO(J=1-0) ratio in nearby galaxies on kpc-scales", ALMA/45m/ASTE Users Meeting, NAOJ Mitaka, Japan, December 2019 (invited, oral)

6. Yajima, Y., Sorai, K., and COMING members, "CO(J = 2-1)/CO(J = 1-0) line ratio in nearby galaxies", 6TH Galaxy Evolution Workshop, Kavli IPMU, Japan, June 2019 (oral)

Presentations in Domestic Conferences and Workshops

1. Yajima, Y., Sorai, K., Salak, D., "Properties of molecular clouds in the starburst galaxy NGC 1808 II. Effects of diffuse molecular gas traced with Atacama Compact Array", The ASJ Spring Annual Meeting, R10b, March 2022 (oral & poster)

2. Yajima, Y., "Influential factor on molecular gas and star formation by dual-component analysis of CO in Maffei 2", Galactic Star Formation 2021, online, November 2021 (oral)

3. Yajima, Y., Sorai, K., "Dual-component analysis of molecular gas in the barred spiral galaxy Maffei 2 using 12CO(J = 1-0) and 13CO(J = 1-0)", The ASJ Autumn Annual Meeting, R06a, September 2021 (oral)

4. Yajima, Y., Sorai, K., "Physical properties and dynamics of molecular gas in the nearby barred spiral galaxy Maffei 2", Nobeyama Science Workshop 2020, online, September 2020 (invited, oral)

5. Yajima, Y., Sorai, K., "Properties of molecular gas in the nearby barred spiral galaxy Maffei 2 via 12CO(J = 1-0)/13CO(J= 1-0) line ratio", The ASJ Autumn Annual Meeting, R05a, online, September 2020 (oral)

6. Yajima, Y., Sorai, K., "12CO(1-0), 13CO(1-0) mappings toward Maffei 2: properties of molecular gas and its dynamics", FUGIN & COMING remote workshop, online, July 2020 (oral)

7. Yajima, Y., Salak, D., Sorai, K., "Properties of molecular gas and molecular clouds in the starburst galaxy NGC 1808", The ASJ Spring Annual Meeting, R15a, The University of Tsukuba, March 2020 (oral)

8. Yajima, Y., Sorai, K., Miyamoto, Y., Muraoka, K., Kuno, N., & COMING members,
   "NRO Legacy Project COMING (26): CO(J = 2–1)/CO(J = 1–0) Line Ratio and Star Formation Activity", The ASJ Autumn Annual Meeting, R06a, Kumamoto University, September 2019 (oral)

9. Yajima, Y., Sorai, K., and COMING members, "12CO(J = 2–1)/12CO(J = 1–0) ratio in nearby galaxies on kpc-scales", Nobeyama Science Workshop -令和元年-, Nobeyama Radio Observatory, September 2019 (invited, oral)

10. Yajima, Y., Sorai, K., Miyamoto, Y., Kuno, N., Muraoka, K., Komatsuzaki, R.,
    "NRO Legacy Project COMING (24): Effects of CO(J = 2–1)/CO(J = 1–0) variations on Molecular Gas Mass in galaxies and the Kennicutt-Schmidt relation", The ASJ Spring Annual Meeting, R03b, Hosei University, March 2019 (oral & poster)

11. Yajima, Y., Sorai, K., and COMING members, "Dynamical effect on molecular gas density and star formation in nearby barred spiral galaxies", ALMA WS for Nearby Galaxies: Science and Techniques, NAOJ Mitaka, February 2019 (oral)

12. Yajima, Y., Sorai, K., Kuno, N., Muraoka, K., Miyamoto, Y., Kaneko, H., Takeuchi, T. T., Watanabe, Y., Kobayashi, I. N. M., Tanaka, T., Yasuda, A., Yoda, M., Kuroda, M., Shibata, S., & COMING members,
    "NRO Legacy Project COMING (21): Physical Properties of Molecular Gas in Nearby Barred Spiral Galaxies with the three CO Lines", The ASJ Autumn Annual Meeting, R05a, University of Hyogo, September 2019 (oral)

13. Yajima, Y., Sorai, K., "Physical Properties of Molecular Gas in Nearby Barred Spiral Galaxies via Multi-line Analysis", The 48th Astronomy & Astrophysics Summer School for students and young researchers, HOTEL Loisir Toyohashi, August 2018 (oral)

14. Yajima, Y., Sorai, K., Kuno, N., Tanaka, T., Yasuda, A., Miyamoto, Y., Kaneko, H., Takeuchi, T. T., Yoda, M., Muraoka, K., Kuroda, M.,
    "Physical Properties of Molecular Gas in Nearby Barred Spiral Galaxies", The 5TH Galaxy Evolution Workshop, Ehime University, June 2018 (oral)

15. Yajima, Y., Sorai, K., Kuno, N., Muraoka, K., Miyamoto, Y., Kaneko, H., Tanaka, T., Sato, Y., Kuroda, M., & COMING members,
    "NRO Legacy Project COMING (13): Physical Properties of Molecular Gas and Star Formation in the Barred Spiral Galaxy NGC 4303", The ASJ Autumn Annual Meeting, R07a, Hokkaido University, September 2017 (oral)

Awards, Educations, and Others

1. Distinguished Student Award (優秀研究奨励賞), Graduate School of Science, Hokkaido University (April 2019)

2. Best Presentation Award, the 42nd Akaiito-kai by Front Office for Human Resource Education and Development, Hokkaido University (January 2020 )

3. Best Presentation Award, the 44th Akaiito-kai by Front Office for Human Resource Education and Development, Hokkaido University (November 2020)

4. Best Presentation Award, the 45th Akaiito-kai by Front Office for Human Resource Education and Development, Hokkaido University (January 2021)

5. Nobeyama Radio Observatory 45 m telescope, open use 2019-2020 semester, "Fraction of diffuse molecular gas in Maffei 2" (CG191002), total 128 hours allocated

6. Teaching Assistant "Physics I", Institute for the Advancement of Higher Education, Hokkaido University (FY2019)

7. Teaching Assistant "Laboratory Experiment in Natural Sciences (Physics)", Institute for the Advancement of Higher Education, Hokkaido University (FY2020, FY2021)

8. Research Assistant, Graduate School of Science, Hokkaido University (FY2019)

9. Part-time lecture, Department of Civil and Environmental Engineering, School of Engineering, Hokkaido University of Science (FY2019, FY2020)

10. Japan Science and Technology Agency, Support for Pioneering Research Initiated by the Next Generation, DX Doctoral Fellow (2021-2022)