IAUGA in Busan (August, 2022)
Giseon Baek and Yong-Hee Lee's Graduated from Doctor's Degree (August, 2022)
Teacher's day in KHU (May, 2022)
Outstanding Doctoral Research Awards (February, 2022)
Hyeong-Sik Yun was honored with an Award for Outstanding Doctoral Thesis Research in Nature Science. The title of the thesis is 'Multi-molecular Line Study of Turbulence in Molecular Clouds with Various Star-forming Environments'. In this paper, Hyeong-Sik Yun investigated the relationship between turbulence and star formation activities within the active star-forming molecular clouds as a part of the TRAO Key Science Program, 'mapping Turbulent properties In star-forming MolEcular clouds down to the Sonic scales' (TIMES).
2021 KAS Spring Meeting (April, 2021)
Spring picnic in the KHU (April, 2021)
The 1st astrochemistry workshop in the KHU (October, 2020)
The 1st astrochemistry workshop in the KHU star formation group was held on 23 October 2020 online. Prof. Jeong-Eun Lee, Dr. Seokho Lee, Dr. Jaeyoung Kim, Dr. Jungha Kim, Mihwa Jin, and Giseon Baek gave talks. Broad topics on astrochemistry including observational studies and chemical modelings on simple and complex organic molecules in the gas and ice, and their fractionations were presented. After the talk session, we had open discussions on the current and future issues in astrochemistry.
Joint Workshop held (December, 2019)
We held a joint workshop with Dr. Daniel Harsono (ASIAA), Dr. Tien-Hao Hsieh (ASIAA) and Dr. Yao-Lun Yang (RIKEN) for 3 days. All members of our team introduced and presented our research and discussed with the invited guests. The followings are titles of talks given by the invited speakers: “Disk Formation around Low-mass Stars and Understanding the Early Solar System" by Dr. Harsono; “Chronology of Episodic Accretion in Protostars - An ALMA Survey of the CO and H2O" by Dr. Hsieh; "Tracing Kinematics and Complex Chemistry of Embedded Protostars with ALMA" by Dr. Yang. We discussed about various topics of star formation after the talk session.
2019 KAS Fall Meeting (October, 2019)
The Korean Astronomical Society (KAS) Fall Meeting was held in Korea Institute for Advanced Science (KIAS), Seoul on 16-18 October 2019. Jinhee Lee and Sunkyung Park gave oral presentations. Beomdu Lim, Hyeong-Sik Yun, and Yong-Hee Lee gave poster presentations in the meeting. In this meeting, one of our group member Hee-Weon Yi won ‘Young Investigater Award(젊은 연구자상)’ by Women In Science, Engineering and Technology(WISET).
JCMT-Transient Survey team meeting in Taiwan (August, 2019)
Our group members Giseon Baek, Yong-Hee Lee, Wooseok Park, Sunkyung Park (remotely) and Prof. Jeong-Eun Lee attended the JCMT-Transient Survey team meeting, which was held in National Central University, Zhongli, Taiwan. We presented what we learned from our 3.5-years survey and discussed the next JCMT large proposal.
KHU & SNU joint workshop in Inje, Gangwon-do (July, 2019)
The KHU star formation group and Prof. Woong-Tae Kim's group in Seoul National University had a joint workshop in Inje. All members of both groups presented their research and discussed how theoretical calculations can help to interpret observations, especially in the view of the formation processes of disks and the resulting substructures in a disk.
KAS Spring Meeting (April, 2019)
The Korean Astronomical Society(KAS) Spring Meeting was held in BEXCO, Busan on 10-12 April 2019 and almost all team members attended the meeting. Prof. Lee gave an invited talk titled 'Episodic Accretion in Star and Planet Formation' in the first plenary session. Jaeyeong Kim, Hee-Weon Yi, Hyeong-Sik Yun, Sung-Yong Yoon, Yong-Hee Lee and Beomdu Lim gave oral presentations. Neha Sharma, Giseon Baek and In Kang gave poster presentations in the meeting.
ALMA Townhall meeting (March, 2019)
The KASI ALMA group visited KHU for the ALMA Townhall meeting. In the meeting, the KASI ALMA group members, Dr. Jongsoo Kim, Dr. Aran Lyo, and Dr. Jihyun Kang gave presentations on the ALMA science highlights, the ALMA proposers' guide, and the ALMA archival data mining. We also discussed about the ALMA proposals that the KHU star formation group members are preparing.
Ice compositions of
a protoplanetary disk was revealed by its stellar outburst (February, 2019)
In a paper published in Nature Astronomy, we report the discovery of 7 Complex Organic Molecules (COMs) in V883 Ori, an outbursting disk source. The chemical composition of ices in disks is of special interest for planetary formation, since ices can make comets and could carry volatiles to Earth-like planets. While the direct observation of ices in disks is difficult, fresh sublimates created during outbursts reveal the ice composition. According to our analysis, the abundances of COMs in the disk of V883 Ori are similar to those of comets.
Joint Workshop held Jes Jørgensen with (November, 2018)
Our group held a meeting with Jes Jørgensen on November 12th at the Kyung Hee University. Jes Jørgensen is an associate professor of Univ. Copenhagen, and a leading scientist in astrochemistry. He also gave a seminar, "Exploring the Complex Chemistry of Embedded Protostars", on November 13th
The wild duck delivers its secrets (November, 2018)
We still have a question whether star clusters comprise a simple stellar population with the same origin or not. Open clusters, in general, have insufficient total masses to host multiple generations of stars. However, interestingly, the Galactic open cluster Messier 11 (wild duck cluster) shows a large spread in colors of stars at main sequence turn-off, which is reminiscent of a color anomaly by the presence of multiple stellar population. We analyzed the high-resolution optical spectra of about 100 stars and found that this color spread originates from a wide range of stellar rotational velocities. Our results indicate that such a color spread found in young star clusters can be understood in the context of stellar evolution considering the effects of rotation, rather than the presence of multiple stellar populations. This paper was published in Nature Astronomy.
Joint Workshop held (September, 2018)
Our group hosts a joint workshop with NAOJ members (Dr. Tomoya Hirota, Dr. Koichiro Sugiyama, and Jungha Kim), and KASI members (Dr. Kee-Tae Kim, and Dr. Ji-Hyun Kang) on September 3rd at the Kyung Hee University. The main topic of the meeting is a future collaboration with ALMA Cycle 3 and 6, and also some other science topics.
Paper of the IGRINS Spectral Library accepted (August, 2018)
A paper presenting the IGRINS Spectral Library has been accepted in
Paper of negative stellar feedback in the λ Orionis cloud published (June, 2018)
This paper investigates that the λ Orionis cloud which contains a well-known OB association “λ Ori” has been suffered a negative stellar feedback. High energy photons from the massive stars (λ Ori) can photo-evaporate dense material and lead to lower column densities, masses, and multiplicities of cores in the λ Orionis cloud compared to those of Orion A and B clouds.
Turbulent Birth of Twin Baby Stars Revealed by ALMA (June, 2017)
In a paper published in
[Colloquium] Prof. Neal Evans (Univ. of Texas at Austin, USA) (October, 2016)
Prof. Neal Evans (Univ. of Texas at Austin, USA) gives a presentation about "Astrochemistry: A Song of Ice and Dust" on October 28, 2016 at the Kyung Hee University.
Joint Workshop held (January, 2016)
Our group host a focused joint workshop on “Carbon Chemistry & Disk Model” on January 18-22, 2016 at the Kyung Hee University. The workshop is organized by Prof. Hideko Nomura (Tokyo Institute of Technology School of Science, Japan) and Prof. Jeong-Eun Lee.
