Ji Hoon Kim
@jhkim.bsky.social
Astronomer@Seoul National University; Project Manager of 7DT/7DS; LSBGs, Star-forming ISM, Late-type galaxy dynamics; He/him/views are own
We also present tentative evidence that mergers contribute to AGN triggering in cluster cores.
Anri put a great effort into this work!
This paper is accepted for publication in PASJ.
Anri put a great effort into this work!
This paper is accepted for publication in PASJ.
September 2, 2025 at 2:26 AM
We also present tentative evidence that mergers contribute to AGN triggering in cluster cores.
Anri put a great effort into this work!
This paper is accepted for publication in PASJ.
Anri put a great effort into this work!
This paper is accepted for publication in PASJ.
We find that the merger fraction increases with redshift for all environments, showing a strong radial gradient in clusters. This suggests that galaxy merger activity is enhanced both at earlier cosmic times and in dense environments, highlighting the role of groups.
September 2, 2025 at 2:22 AM
We find that the merger fraction increases with redshift for all environments, showing a strong radial gradient in clusters. This suggests that galaxy merger activity is enhanced both at earlier cosmic times and in dense environments, highlighting the role of groups.
Using a new non-parametric classification scheme that combines Gini-M20 and shape asymmetry, we identify 12,666 mergers from a sample of 33,320 galaxies, validating our method against GALAXY CRUISE visual classifications.
September 2, 2025 at 2:19 AM
Using a new non-parametric classification scheme that combines Gini-M20 and shape asymmetry, we identify 12,666 mergers from a sample of 33,320 galaxies, validating our method against GALAXY CRUISE visual classifications.
It's paper day! 🧪🔭
Our latest ApJS paper presents the second AllBRICQS catalog — 62 newly confirmed luminous quasars in the Northern Hemisphere (0.09 < z < 2.48), selected via WISE + Gaia DR3. Highlights include the most luminous FeLoBAL quasar ever found.
arxiv.org/pdf/2508.06028
Our latest ApJS paper presents the second AllBRICQS catalog — 62 newly confirmed luminous quasars in the Northern Hemisphere (0.09 < z < 2.48), selected via WISE + Gaia DR3. Highlights include the most luminous FeLoBAL quasar ever found.
arxiv.org/pdf/2508.06028
August 11, 2025 at 9:12 AM
It's paper day! 🧪🔭
Our latest ApJS paper presents the second AllBRICQS catalog — 62 newly confirmed luminous quasars in the Northern Hemisphere (0.09 < z < 2.48), selected via WISE + Gaia DR3. Highlights include the most luminous FeLoBAL quasar ever found.
arxiv.org/pdf/2508.06028
Our latest ApJS paper presents the second AllBRICQS catalog — 62 newly confirmed luminous quasars in the Northern Hemisphere (0.09 < z < 2.48), selected via WISE + Gaia DR3. Highlights include the most luminous FeLoBAL quasar ever found.
arxiv.org/pdf/2508.06028
Taeho Ryu is providing a clue on the formation of blue straggler stars via magnetic field amplification. 🔭🧪
June 19, 2025 at 5:18 AM
Taeho Ryu is providing a clue on the formation of blue straggler stars via magnetic field amplification. 🔭🧪
Eun-jin Shin is giving a talk on IMBH formation in dwarf galaxies during IAUS398/MODEST-25. 🔭🧪
June 18, 2025 at 2:45 AM
Eun-jin Shin is giving a talk on IMBH formation in dwarf galaxies during IAUS398/MODEST-25. 🔭🧪
Michela Mapelli is starting the very first scientific talk for IAU Symposium 398/MODEST-25 “Compact Stars and Binaries in Dense Stellar Systems”. 🔭🧪
June 16, 2025 at 2:03 AM
Michela Mapelli is starting the very first scientific talk for IAU Symposium 398/MODEST-25 “Compact Stars and Binaries in Dense Stellar Systems”. 🔭🧪
Woong-seop Jeong is giving a talk on SPHEREx at Seoul National University. 🔭🧪
April 24, 2025 at 7:37 AM
Woong-seop Jeong is giving a talk on SPHEREx at Seoul National University. 🔭🧪
Uros Seljak is giving a talk at Korea AI Summit 2024.
December 6, 2024 at 2:29 AM
Uros Seljak is giving a talk at Korea AI Summit 2024.
Tell us your birth year by sharing the cover of an album that was released the year you were born.
November 25, 2024 at 1:01 PM
Tell us your birth year by sharing the cover of an album that was released the year you were born.
Now Kentaro Motohara is giving a talk on TAO, Tokyo Atacama Observatory at Korean Astronomical Society meeting.
October 18, 2024 at 12:44 AM
Now Kentaro Motohara is giving a talk on TAO, Tokyo Atacama Observatory at Korean Astronomical Society meeting.
Kentaro Motohara is giving a seminar on ZFOURGE and more at Seoul National University.
October 15, 2024 at 7:46 AM
Kentaro Motohara is giving a seminar on ZFOURGE and more at Seoul National University.
So begins IAU GA Cape Town. 🔭🧪⚛️
August 6, 2024 at 7:10 AM
So begins IAU GA Cape Town. 🔭🧪⚛️
I am on my way to IAU GA 2024 via Dubai.
August 5, 2024 at 3:29 AM
I am on my way to IAU GA 2024 via Dubai.
I am in Beppu for SUPER-IRNET 2024 workshop. 🔭🧪⚛️
July 23, 2024 at 5:25 AM
I am in Beppu for SUPER-IRNET 2024 workshop. 🔭🧪⚛️
Luis Ho is giving a talk on “little red dot” at Seoul
National University. 🔭🧪⚛️
National University. 🔭🧪⚛️
July 18, 2024 at 8:41 AM
Luis Ho is giving a talk on “little red dot” at Seoul
National University. 🔭🧪⚛️
National University. 🔭🧪⚛️
Interesting comparison between CIGALE and several ML-based photo-z methods by Denis. #SPIEastro
June 18, 2024 at 6:05 AM
Interesting comparison between CIGALE and several ML-based photo-z methods by Denis. #SPIEastro
I am in Yokohama for SPIE ATI. 🔭🧪
June 15, 2024 at 11:44 PM
I am in Yokohama for SPIE ATI. 🔭🧪
I will attend SPIE meeting in Yokohama to provide a glimpse of our project, the 7-Dimensional Telescope, and its current status. Hopefully, I can meet and catch up with old and new colleagues. 🔭🧪
March 20, 2024 at 5:33 AM
I will attend SPIE meeting in Yokohama to provide a glimpse of our project, the 7-Dimensional Telescope, and its current status. Hopefully, I can meet and catch up with old and new colleagues. 🔭🧪
Our team has been carrying out the commissioning of the 7DT. It is quite a struggle, to be honest. Hopefully, we will get where we want to be sooner than later. Meanwhile, a pretty picture.🧪🔭
February 15, 2024 at 1:16 AM
Our team has been carrying out the commissioning of the 7DT. It is quite a struggle, to be honest. Hopefully, we will get where we want to be sooner than later. Meanwhile, a pretty picture.🧪🔭
Yuan-Sen Ting gave a talk on LLM for astronomical research and its community at Seoul National University. As his host, I was so proud. 🔭🧪
October 31, 2023 at 11:43 PM
Yuan-Sen Ting gave a talk on LLM for astronomical research and its community at Seoul National University. As his host, I was so proud. 🔭🧪
Professor Chae is giving the first plenary talk of 2024 fall KAS meeting on his recent work on wide binaries from GAIA. 🔭🧪
October 18, 2023 at 4:05 AM
Professor Chae is giving the first plenary talk of 2024 fall KAS meeting on his recent work on wide binaries from GAIA. 🔭🧪
After visiting NOIRLab south, we climbed up to Cerro Tololo, and Cerro Pachon. Yes, Rubin is huge. 🔭🧪
October 14, 2023 at 9:14 PM
After visiting NOIRLab south, we climbed up to Cerro Tololo, and Cerro Pachon. Yes, Rubin is huge. 🔭🧪
Up close and personal. 🔭🧪
October 11, 2023 at 9:39 PM
Up close and personal. 🔭🧪