Zobrazeno 1 - 10
of 6 647
pro vyhledávání: '"I Tanaka"'
Autor:
Rana Ghosh, Ankan Das, Prasanta Gorai, Suman Kumar Mondal, Kenji Furuya, Kei E. I. Tanaka, Takashi Shimonishi
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
SO and SO2 are two potential candidates to trace the different evolutionary phases of the low-mass star-formation process. Here, we report observations of SO and SO2 along with their isotopologues, 34SO and 34SO2, respectively, in four distinct phase
Externí odkaz:
https://doaj.org/article/296083f36dbb4722b20a195169d099ca
Autor:
Emiko C. Gardiner, Jonathan C. Tan, Jan E. Staff, Jon P. Ramsey, Yichen Zhang, Kei E. I. Tanaka
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 145 (2024)
Massive protostars launch accretion-powered, magnetically collimated outflows, which play crucial roles in the dynamics and diagnostics of the star formation process. Here we calculate the shock heating and resulting free–free radio emission in num
Externí odkaz:
https://doaj.org/article/338a23d108c44ecd8c0b426365be6c0b
Autor:
Yu Cheng, Xing Lu, Patricio Sanhueza, Hauyu Baobab Liu, Qizhou Zhang, Roberto Galván-Madrid, Ke Wang, Fumitaka Nakamura, Tie Liu, Siyi Feng, Shanghuo Li, Sihan Jiao, Kei E. I. Tanaka, Xunchuan Liu, Pak Shing Li, Qiuyi Luo, Qilao Gu, Yuxin Lin, Andrés E. Guzmán
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 56 (2024)
Filamentary structures are ubiquitously found in high-mass star-forming clouds. To investigate the relationship between filaments and star formation, we carry out the INFANT (Investigations of Massive Filaments and Sar Formation) survey, a multiscale
Externí odkaz:
https://doaj.org/article/610da0350b8e420c9bea4507add48d46
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 117 (2024)
To test theoretical models of massive star formation it is important to compare their predictions with observed systems. To this end, we conduct CO molecular line radiative transfer post-processing of 3D magnetohydrodynamic simulations of various sta
Externí odkaz:
https://doaj.org/article/b6a4687b4da741fab034f4aeb303b55e
Autor:
Prasanta Gorai, Chi-Yan Law, Jonathan C. Tan, Yichen Zhang, Rubén Fedriani, Kei E. I. Tanaka, Mélisse Bonfand, Giuliana Cosentino, Diego Mardones, Maria T. Beltrán, Guido Garay
Publikováno v:
The Astrophysical Journal, Vol 960, Iss 2, p 127 (2024)
We study the astrochemical diagnostics of the isolated massive protostar G28.20-0.05. We analyze data from Atacama Large Millimeter/submillimeter Array 1.3 mm observations with a resolution of 0.″2 (∼1000 au). We detect emission from a wealth of
Externí odkaz:
https://doaj.org/article/89a2e5fc85de4155925c881cd9de815e
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 2, p L41 (2023)
We report the first detection of hot molecular cores in the Small Magellanic Cloud (SMC), a nearby dwarf galaxy with 0.2 solar metallicity. We observed two high-mass young stellar objects in the SMC with the Atacama Large Millimeter/submillimeter Arr
Externí odkaz:
https://doaj.org/article/1001946c58a24479990adbce22427f61
Autor:
Marta Sewiło, Kazuki Tokuda, Stan E. Kurtz, Steven B. Charnley, Thomas Möller, Jennifer Wiseman, C.-H. Rosie Chen, Remy Indebetouw, Álvaro Sánchez-Monge, Kei E. I. Tanaka, Peter Schilke, Toshikazu Onishi, Naoto Harada
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 22 (2023)
We report the first extragalactic detection of the higher-order millimeter hydrogen recombination lines (Δ n > 2). The γ -, ϵ -, and η -transitions have been detected toward the millimeter continuum source N 105–1 A in the star-forming region N
Externí odkaz:
https://doaj.org/article/958b00ad68954f0cb5fde3108e81792c
Autor:
Bratati Bhat, Rumela Kar, Suman Kumar Mondal, Rana Ghosh, Prasanta Gorai, Takashi Shimonishi, Kei E. I. Tanaka, Kenji Furuya, Ankan Das
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 111 (2023)
The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to understand their
Externí odkaz:
https://doaj.org/article/fa7d0e85597d406e988cc30635201fdd
Autor:
Kazuki Tokuda, Naoto Harada, Kei E. I. Tanaka, Tsuyoshi Inoue, Takashi Shimonishi, Yichen Zhang, Marta Sewiło, Yuri Kunitoshi, Ayu Konishi, Yasuo Fukui, Akiko Kawamura, Toshikazu Onishi, Masahiro N. Machida
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 52 (2023)
Recent millimeter/submillimeter facilities have revealed the physical properties of filamentary molecular clouds in relation to high-mass star formation. A uniform survey of the nearest, face-on star-forming galaxy, the Large Magellanic Cloud (LMC),
Externí odkaz:
https://doaj.org/article/ae6b14cb12db4b8abf5bfa16233c601c
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 1, p 29 (2023)
Typical accretion disks around massive protostars are hot enough for water ice to sublimate. We here propose to utilize the massive protostellar disks for investigating the collisional evolution of silicate grains with no ice mantle, which is an esse
Externí odkaz:
https://doaj.org/article/af02a94e436b413a99af6c4a38c93ff0