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20 results on '"Huang, Yen-Ru"'

1. Metal Mesh IR Filter for wSMA

Author

Li, Chao-Te, Tong, C. -Y. E., Wang, Ming-Jye, Chen, Tse-Jun, Chang, Yen-Pin, Yen, Sheng-Feng, Cheng, Jen-Chieh, Lu, Wei-Chun, and Huang, Yen-Ru

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Since the start of full science operations from 2004, the Submillimeter Array has been implementing plans to expand IF bandwidths and upgrade receivers and cryostats. Metal mesh low-pass filters were designed to block infrared (IR) radiation to reduce the thermal load on the cryostats. Filters were fabricated on a quartz wafer through photolithography and coated with anti-reflection (AR) material. The filters were tested from 200 to 400 GHz to verify their passband performances. The measurement results were found to be in good agreement with EM simulation results. They were tested in the far-infrared (FIR) frequency range to verify out-of-band rejection. The IR reflectivity was found to be approximately 70%, which corresponded to the percentage of the area blocked by metal., Comment: 9pages, 14 figures

Published
2022
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2. First-generation Science Cases for Ground-based Terahertz Telescopes

Author

Hirashita, Hiroyuki, Koch, Patrick M., Matsushita, Satoki, Takakuwa, Shigehisa, Nakamura, Masanori, Asada, Keiichi, Liu, Hauyu Baobab, Urata, Yuji, Wang, Ming-Jye, Wang, Wei-Hao, Takahashi, Satoko, Tang, Ya-Wen, Chang, Hsian-Hong, Huang, Kuiyun, Morata, Oscar, Otsuka, Masaaki, Lin, Kai-Yang, Tsai, An-Li, Lin, Yen-Ting, Srinivasan, Sundar, Martin-Cocher, Pierre, Pu, Hung-Yi, Kemper, Francisca, Patel, Nimesh, Grimes, Paul, Huang, Yau-De, Han, Chih-Chiang, Huang, Yen-Ru, Nishioka, Hiroaki, Lin, Lupin Chun-Che, Zhang, Qizhou, Keto, Eric, Burgos, Roberto, Chen, Ming-Tang, Inoue, Makoto, and Ho, Paul T. P.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Ground-based observations at terahertz (THz) frequencies are a newly explorable area of astronomy for the next ten years. We discuss science cases for a first-generation 10-m class THz telescope, focusing on the Greenland Telescope as an example of such a facility. We propose science cases and provide quantitative estimates for each case. The largest advantage of ground-based THz telescopes is their higher angular resolution (~ 4 arcsec for a 10-m dish), as compared to space or airborne THz telescopes. Thus, high-resolution mapping is an important scientific argument. In particular, we can isolate zones of interest for Galactic and extragalactic star-forming regions. The THz windows are suitable for observations of high-excitation CO lines and [N II] 205 um lines, which are scientifically relevant tracers of star formation and stellar feedback. Those lines are the brightest lines in the THz windows, so that they are suitable for the initiation of ground-based THz observations. THz polarization of star-forming regions can also be explored since it traces the dust population contributing to the THz spectral peak. For survey-type observations, we focus on ``sub-THz'' extragalactic surveys, whose uniqueness is to detect galaxies at redshifts z ~ 1--2, where the dust emission per comoving volume is the largest in the history of the Universe. Finally we explore possibilities of flexible time scheduling, which enables us to monitor active galactic nuclei, and to target gamma-ray burst afterglows. For these objects, THz and submillimeter wavelength ranges have not yet been explored., Comment: 39 pages, 17 figures, accepted for publication in PASJ (as a review paper)

Published
2015
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6. Metal mesh IR filter for wSMA

Author

Li, Chao-Te, primary, Tong, C. Y. Edward, additional, Wang, Ming-Jye, additional, Chen, Tse-Jun, additional, Chang, Yen-Pin, additional, Yen, Sheng-Feng, additional, Cheng, Jen-Chieh, additional, Lu, Wei-Chun, additional, and Huang, Yen-Ru, additional

Published
2020
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8. Metal mesh IR filter for wSMA

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Li, Chao-Te, Tong, C.-Y. E., Wang, Ming-Jye, Chen, Tse-Jun, Chang, Yen-Pin, Yen, Sheng-Feng, Cheng, Jen-Chieh, Lu, Wei-Chun, and Huang, Yen-Ru

Published
2020
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11. First-generation science cases for ground-based terahertz telescopes

Author

Hirashita, Hiroyuki, primary, Koch, Patrick M., additional, Matsushita, Satoki, additional, Takakuwa, Shigehisa, additional, Nakamura, Masanori, additional, Asada, Keiichi, additional, Liu, Hauyu Baobab, additional, Urata, Yuji, additional, Wang, Ming-Jye, additional, Wang, Wei-Hao, additional, Takahashi, Satoko, additional, Tang, Ya-Wen, additional, Chang, Hsian-Hong, additional, Huang, Kuiyun, additional, Morata, Oscar, additional, Otsuka, Masaaki, additional, Lin, Kai-Yang, additional, Tsai, An-Li, additional, Lin, Yen-Ting, additional, Srinivasan, Sundar, additional, Martin-Cocher, Pierre, additional, Pu, Hung-Yi, additional, Kemper, Francisca, additional, Patel, Nimesh, additional, Grimes, Paul, additional, Huang, Yau-De, additional, Han, Chih-Chiang, additional, Huang, Yen-Ru, additional, Nishioka, Hiroaki, additional, Lin, Lupin Chun-Che, additional, Zhang, Qizhou, additional, Keto, Eric, additional, Burgos, Roberto, additional, Chen, Ming-Tang, additional, Inoue, Makoto, additional, and Ho, Paul T. P., additional

Published
2015
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17. A method of comparing the speed of starlight and the speed of light from a terrestrial source

Author

Wu, Jingshown, additional, Chang, Shenq-Tsong, additional, Tsao, Hen-Wai, additional, Huang, Yen-Ru, additional, Lee, San-Liang, additional, Chang, Cheng-Chieh, additional, Lin, Wei-Cheng, additional, Tsay, Ho-Lin, additional, Wang, Yi-Lung, additional, Huang, Po-Hsuan, additional, Hsu, Ming-Ying, additional, Hsu, Chia-Wei, additional, Lin, Shu-Chuan, additional, Hung, Yung-Jr, additional, Shiu, Ye-Li, additional, Hsiao, Yung-Chung, additional, Chang, Je-Yuan, additional, Tsai, Din Ping, additional, Huang, Ting-Ming, additional, Young, Hong-Tsu, additional, Liu, Yi-Cheng, additional, Chang, Chung-Min, additional, Chiang, Wei-Chieh, additional, Huang, Ji-Ying, additional, and Chen, Ya-Hsin, additional

Published
2013
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19. First-generation science cases for ground-based terahertz telescopes

Author

Hirashita, Hiroyuki, Koch, Patrick M., Matsushita, Satoki, Takakuwa, Shigehisa, Nakamura, Masanori, Asada, Keiichi, Liu, Hauyu Baobab, Urata, Yuji, Wang, Ming-Jye, Wang, Wei-Hao, Takahashi, Satoko, Tang, Ya-Wen, Chang, Hsian-Hong, Huang, Kuiyun, Morata, Oscar, Otsuka, Masaaki, Lin, Kai-Yang, Tsai, An-Li, Lin, Yen-Ting, Srinivasan, Sundar, Martin-Cocher, Pierre, Pu, Hung-Yi, Kemper, Francisca, Patel, Nimesh, Grimes, Paul, Huang, Yau-De, Han, Chih-Chiang, Huang, Yen-Ru, Nishioka, Hiroaki, Lin, Lupin Chun-Che, Zhang, Qizhou, Keto, Eric, Burgos, Roberto, Chen, Ming-Tang, Inoue, Makoto, and Ho, Paul T. P.

Abstract

Ground-based observations at terahertz (THz) frequencies are a newly explorable area of astronomy in the coming decades. We discuss science cases for a first-generation 10-m class THz telescope, focusing on the Greenland Telescope as an example of such a facility. We propose science cases and provide quantitative estimates for each case. The largest advantage of ground-based THz telescopes is their higher angular resolution (∼ 4″ for a 10-m dish), as compared to space or airborne THz telescopes. Thus, high-resolution mapping is an important scientific argument. In particular, we can isolate zones of interest for Galactic and extragalactic star-forming regions. The THz windows are suitable for observations of high-excitation CO lines and [N ii] 205-μm lines, which are scientifically relevant tracers of star formation and stellar feedback. Those lines are the brightest lines in the THz windows, so they are suitable for the initiation of ground-based THz observations. THz polarization of star-forming regions can also be explored since it traces the dust population contributing to the THz spectral peak. For survey-type observations, we focus on “sub-THz” extragalactic surveys, the uniqueness of which is detecting galaxies at redshifts z∼ 1–2, where the dust emission per comoving volume is the largest in the history of the Universe. Finally we explore possibilities of flexible time scheduling, which enables us to monitor active galactic nuclei, and to target gamma-ray burst afterglows. For these objects, THz and submillimeter wavelength ranges have not yet been explored.

Published
2016
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20. A method of comparing the speed of starlight and the speed of light from a terrestrial source

Author

Roychoudhuri, Chandrasekhar, Kracklauer, Al F., De Raedt, Hans, Wu, Jingshown, Chang, Shenq-Tsong, Tsao, Hen-Wai, Huang, Yen-Ru, Lee, San-Liang, Chang, Cheng-Chieh, Lin, Wei-Cheng, Tsay, Ho-Lin, Wang, Yi-Lung, Huang, Po-Hsuan, Hsu, Ming-Ying, Hsu, Chia-Wei, Lin, Shu-Chuan, Hung, Yung-Jr, Shiu, Ye-Li, Hsiao, Yung-Chung, Chang, Je-Yuan, Tsai, Din Ping, Huang, Ting-Ming, Young, Hong-Tsu, Liu, Yi-Cheng, Chang, Chung-Min, Chiang, Wei-Chieh, Huang, Ji-Ying, and Chen, Ya-Hsin

Published
2013
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