Now showing items 1-9 of 9

    • ALMA Reveals Sequential High-mass Star Formation in the G9.62+0.19 Complex 

      Liu, Tie; Lacy, John; Li, Pak Shing; Wang, Ke; Qin, Sheng-Li; Zhang, Qizhou; Kim, Kee-Tae; Garay Brignardello, Guido; Wu, Yuefang; Mardones, Diego; Zhu, Qingfeng; Tatematsu, Ken'ichi; Hirota, Tomoya; Ren, Zhiyuan; Liu, Sheng-Yuan; Chen, Huei-Ru; Su, Yu-Nung; Li, Di (IOP Publishing Ltd, 2017)
      Stellar feedback from high-mass stars (e.g., H II regions) can strongly influence the surrounding interstellar medium and regulate star formation. Our new ALMA observations reveal sequential high-mass star formation taking ...
    • Astrochemical Properties of Planck Cold Clumps 

      Tatematsu, Ken'Ichi; Liu, Tie; Ohashi, Satoshi; Sanhueza, Patricio; Nguyen Lu'O'Ng, Quang; Hirota, Tomoya; Liu, Sheng Yuan; Hirano, Naomi; Choi, Minho; Kang, Miju; Thompson, Mark A.; Fuller, Gary; Wu, Yuefang; Li, Di; Di Francesco, James; Kim, Kee Tae; Wang, Ke; Ristorcelli, Isabelle; Juvela, Mika; Shinnaga, Hiroko; Cunningham, María; Saito, Masao; Lee, Jeong-Eun; Tóth, L. Viktor; He, Jinhua; Sakai, Takeshi; Kim, Jungha (IOP Publishing, 2017)
      We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust ...
    • Discovery of an extremely wide-angle bipolar outflow in afgl 5142 

      Liu, Tie; Zhang, Qizhou; Kim, Kee-Tae; Wu, Yuefang; Lee, Chang-Won; Goldsmith, Paul F.; Li, Di; Liu, Sheng-Yuan; Chen, Huei-Ru; Tatematsu, Ken'ichi; Lee, Jeong-Eun; Qin, Sheng-Li; Mardones Pérez, Diego; Cho, Se-Hyung (2016-06-10)
      Most bipolar outflows are associated with individual young stellar objects and have small opening angles. Here we report the discovery of an extremely wide-angle (similar to 180 degrees) bipolar outflow ("EWBO") in a cluster ...
    • Extremely Energetic Outflow and Decelerated Expansion in W49N 

      Liu, Tie; Kim, Kee-Tae; Wu, Yuefang; Li, Di; Lee, Chang-Won; Pree, Christopher De; Qin, Sheng-Li; Wang, Ke; Tatematsu, Ken’ichi; Zhang, Qizhou; Mardones Pérez, Diego; Liu, Sheng-Yuan; Cho, Se-Hyung (The American Astronomical Society, 2015-09-10)
      W49N is a mini-starburst in the Milky Way and is thus an ideal laboratory for high-mass star formation studies. Due to its large distance (11.1 0.7 0.9 - + kpc), the kinematics inside and between the dense molecular ...
    • Follow-up Observations Toward Planck Cold Clumps with Ground-Based Radio Telescopes 

      Liu, Tie; Wu, Yuefang; Mardones Pérez, Diego; Kim, Kee-Tae; Menten, Karl; Tatematsu, Ken; Cunningham, Maria; Juvela, Mika; Zhang, Qizhou; Goldsmith, Paul; Liu, Sheng-Yuan; Zhang, Hua-Wei; Meng, Fanyi; Li, Di; Lo, Nadia; Guan, Xin; Yuan, Jinghua; Belloche, Arnaud; Henkel, Christian; Wyrowski, Friedrich; Garay Brignardello, Guido; Ristorcelli, Isabelle; Lee, Jeong-Eun; Wang, Ke; Bronfman Aguiló, Leonardo; Toth, L.; Schnee, Scott; Qin, Shengli; Akhter, Shaila (The Korean Astronomical Society, 2015-09)
      The physical and chemical properties of prestellar cores, especially massive ones, are still far from being well understood due to the lack of a large sample. The low dust temperature (< 14 K) of Planck cold clumps makes ...
    • Infall signatures in a prestellar core embedded in the high-mass 70 mu m Dark IRDC G331.372-00.116 

      Contreras, Yanett; Sanhueza, Patricio; Jackson, James M.; Guzmán, Andrés E.; Longmore, Steven; Garay Brignardello, Guido; Zhang, Qizhou; Quang, Nguyen-Lu'o'Ng; Tatematsu, Ken'ichi; Nakamura, Fumitaka; Sakai, Takeshi; Ohashi, Satoshi; Liu, Tie; Saito, Masao; Gómez, Laura; Rathborne, Jill; Whitaker, Scott (IOP Publishing, 2018-07)
      Using Galactic Plane surveys, we have selected a massive (1200M circle dot), cold (14 K) 3.6-70 mu m dark IRDC, G331.372-00.116. This infrared dark cloud (IRDC) has the potential to form high-mass stars, and given the ...
    • Planck cold clumps in the lambda orionis complex. I. Discovery of an extremely young class 0 protostellar object and a proto-brown dwarf candidate in the bright-rimmed clump pgcc g192.32-11.88 

      Liu, Tie; Zhang, Qizhou; Kim, Kee-Tae; Wu, Yuefang; Lee, Chang Won; Lee, Jeong-Eun; Tatematsu, Kenichi; Choi, Minho; Juvela, Mika; Thompson, Mark; Goldsmith, Paul F.; Liu, Sheng-yuan; Naomi, Hirano; Koch, Patrick; Henkel, Christian; Sanhueza, Patricio; He, JinHua; Rivera-Ingraham, Alana; Wang, Ke; Cunningham, María R.; Tang, Ya-Wen; Lai, Shih-Ping; Yuan, Jinghua; Li, Di; Fuller, Gary; Kang, Miju; Luong, Quang Nguyen; Liu, Hauyu Baobab; Ristorcelli, Isabelle; Yang, Ji; Xu, Ye; Hirota, Tomoya; Mardones Pérez, Diego; Qin, Sheng-Li; Chen, Huei-Ru; Kwon, Woojin; Meng, Fanyi; Zhang, Huawei; Kim, Mi-Ryang; Yi, Hee-Weon (IOP Publisihing, 2016)
      We are performing a series of observations with ground-based telescopes toward Planck Galactic cold clumps (PGCCs) in the lambda Orionis complex in order to systematically investigate the effects of stellar feedback. In ...
    • Star formation laws in both galactic massive clumps and external galaxies: extensive study with dust coninuum, HCN (4-3), AND CS (7-6) 

      Liu, Tie; Kim, Kee-Tae; Yoo, Hyunju; Liu, Sheng-yuan; Tatematsu, Ken'ichi; Qin, Sheng-Li; Zhang, Qizhou; Wu, Yuefang; Wang, Ke; Goldsmith, Paul; Juvela, Mika; Lee, Jeong-Eun; Tóth, L. Viktor; Mardones Pérez, Diego; Garay Brignardello, Guido; Bronfman Aguiló, Leonardo; Cunningham, Maria; Li, Di; Lo, Nadia; Ristorcelli, Isabelle; Schnee, Scott (The American Astronomical Society, 2016-10-01)
      We observed 146 Galactic clumps in HCN (4-3) and CS (7-6) with the Atacama Submillimeter Telescope Experiment 10 m telescope. A tight linear relationship between star formation rate and gas mass traced by dust continuum ...
    • The TOP-SCOPE survey of planck galactic cold clumps: survey overview and results of an exemplar source, PGCC G26.53+0.17 

      Liu, Tie; He, JinHua; Bronfman Aguiló, Leonardo; Garay Brignardello, Guido; Lo, N.; Mardones Pérez, Diego (IOP Publishing Ltd, 2018)
      The low dust temperatures (< 14 K) of Planck Galactic cold clumps (PGCCs) make them ideal targets to probe the initial conditions and very early phase of star formation. "TOP-SCOPE" is a joint survey program targeting ...