Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Tatsuhiko I. Hasegawa"'
Autor:
X. Z. Zhang, Yong Sun Park, Young Chol Minh, Seokho Lee, Yi Jeng Kuan, Kee-Tae Kim, Chi-Hung Yan, Tatsuhiko I. Hasegawa, Dharam Vil Lal
Publikováno v:
Journal of The Korean Astronomical Society. 47:179-185
We study the physical and chemical properties of the molecular clump hosting a young stellar cluster, IRAS 20160+3636, which is believed to have formed via the “collect and collapse” process. Physical parameters of the UC Hii region associated wi
A single dish monitoring of millimeter maser lines SiS J=14-13 and HCN nu_2 = 1^f J=3-2 and several other rotational lines is reported for the archetypal carbon star IRC+10216. Relative line strength variations of 5%~30% are found for eight molecular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f9950fbf3a8b73d3808d5d0d5d4b7e8
Autor:
Hauyu Baobab Liu, Young Chol Minh, Jinhua He, Tatsuhiko I. Hasegawa, Roberto Galván-Madrid, Dipen Sahu
Publikováno v:
The Astrophysical Journal. 864:102
The central region of the massive star-forming cloud G33.92+0.11 was investigated with the emission from the deuterated species HDCS and DCN observed at sub-arcsecond angular resolution (~07) using ALMA. HDCS shows a distributed emission throughout t
Autor:
Dinh-V-Trung, Sebastien Muller, Jeremy Lim, Tatsuhiko I. Hasegawa, Naomi Hirano, C. Muthu Mariappan, A-Ran Lyo, Zhen-Yuan Huang, Sun Kwok
Publikováno v:
The Astrophysical Journal. 722:273-280
Highly collimated multiple bipolar flows are detected with a 3 '' resolution in the HCO+ (J = 3-2) and HCN (J = 3-2) lines in the young planetary nebula NGC 7027 with the Submillimeter Array. The HCO+ and HCN flows coincide in location and velocity w
Publikováno v:
The Astrophysical Journal. 673:264-270
We report the detection of a molecular bipolar outflow in the CO J = 3–2 line in the optical multipolar planetary nebula NGC 2440. The observed CO J = 3–2 emission shows two major velocity components which are blue- and redshifted by 18 km s−1
Autor:
P. Manoj, Harish Bhatt, Nagayoshi Ohashi, Qizhou Zhang, N. M. Ashok, Paul T. P. Ho, Tatsuhiko I. Hasegawa, Huei-Ru Chen
Publikováno v:
The Astrophysical Journal. 667:L187-L190
We present the results of the interferometric observations of the circumstellar disk surrounding MWC 297 in the continuum at 230 GHz (1.3 mm) and in the (J=2-1) rotational transitions of $^{12}$CO,$^{13}$CO and C$^{18}$O using the Submillimeter Array
Autor:
Sun Kwok, Urban Frisk, Åke Hjalmarson, Kay Justtanont, Fredrik L. Schöier, Hans Olofsson, Anders Winnberg, Kevin Volk, Aa. Sandqvist, L.-Å. Nyman, Tatsuhiko I. Hasegawa, N. Koning, Michael Olberg
Publikováno v:
The Astrophysical Journal. 637:791-797
Submillimeter lines of H2O and NH3 have been detected in the carbon star IRC +10216 (CW Leo) with the Odin submillimeter satellite. The detection of the J = 110 → 101 557 GHz line of ortho-H2O confirms the earlier detection in the same source with
Autor:
George F. Mitchell, Nicholas F. H Tothill, G. Serra, Roy Booth, Kalevi Mattila, T. Liljeström, Bengt Larsson, P. A. Feldman, Christine D. Wilson, Per Bergman, Pierre Encrenaz, Michael Lindqvist, F. von Schéele, John H. Black, Maryvonne Gerin, Edith Falgarone, L. Nordh, G. Olofsson, E. M. Gregersen, René Liseau, L. E. B. Johansson, Michael Olberg, I. Ristorcelli, Sun Kwok, Jacques Crovisier, Åke Hjalmarson, Urban Frisk, Kevin Volk, V. Buat, Alain Lecacheux, Aa. Sandqvist, H. G. Floren, Peter F. Bernath, Michel Fich, A. O. H. Olofsson, Tatsuhiko I. Hasegawa, Laurent Pagani, Tommy Wiklind, Jorma Harju, Charles L. Curry
Publikováno v:
Scopus-Elsevier
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2003, 402, pp.L77-L81. ⟨10.1051/0004-6361:20030344⟩
Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, 2003, 402, pp.L77-L81. ⟨10.1051/0004-6361:20030344⟩
For the first time, a search has been conducted in our Galaxy for the 119 GHz transition connecting to the ground state of O2, using the Odin satellite. Equipped with a sensitive 3 mm receiver (Tsy ...
Autor:
Tatsuhiko I. Hasegawa, Sun Kwok
Publikováno v:
The Astrophysical Journal. 585:475-481
The 492 GHz (3P1 → 3P0) fine-structure line of neutral atomic carbon (C I) has been observed in the planetary nebulae (PNe) NGC 6302, IRAS 21282+5050, and NGC 7027, and in the protoplanetary nebula (PPN) AFGL 2688. The estimated C I/CO abundance ra
Autor:
Tatsuhiko I. Hasegawa
Publikováno v:
Symposium - International Astronomical Union. 209:249-256
Photo-chemical processes in hot neutral gas are summarized that are likely responsible for the destruction and formation of observed molecules in planetary nebulae. According to the hot gas scenario, detected simple molecules such as CN, HCN, C2H, an