ICGAC15 is the series of triennial conferences on Gravitation, Astrophysics and Cosmology which take place in the Asia-Pacific region, with the goals to promote cooperation among the member countries and within an international context, high level studies on hot topics and to encourage young physicists on these fields. This conference has been one of the key programs sponsored by APCTP over the past twenty years. It has been hosted by AP regions: Seoul, Korea (1993); Hsinchu, Taiwan (1995); Tokyo, Japan (1997); Beijing, China (1999); Moscow, Russia (2001); Seoul, Korea (2003); Jhongli, Taiwan (2005); Nara, Japan (2007); Wuhan, China (2009); Qui-Nhon, Vietnam (2011); Almaty, Kazakhstan (2013); Moscow, Russia (2015), Seoul, Korea (2017) and Taiwan (2020). After ICGAC14 (online), Taiwan (2020), it will be held at APCTP, Gyeongju, Korea in July 3-7, 2023, as a sequence of MG, GRG and ICGAC for every three years. 

The topics of ICGAC15 include 

1. Classical Gravity, GR Extensions 

2. Classical and Quantum Cosmology 

3. Dark Matter and Dark Energy 

4. Black Holes, Wormholes 

5. Strings, Branes, Higher Spin Fields and Quantum Gravity 

6. Extra Dimensions and Variation of Constants 

7. Experimental Studies of Gravity and Fundamental Physics Space Projects 

8. Gravitational Waves 

9. Multi Messenger Astronomy 

10. Numerical Relativity 

11. Relativistic Astrophysics 

12. White Dwarfs, Neutron Stars and Gamma Ray Bursts 

13. Alternative Theory

14. Education  

International Standing Committee

Cho, Yongmin (SNU, Korea, Chair)

Abishev, Medeu (Al-Farabi Kazakh NU, KZ)

Brill, Dieter (U Maryland, USA)

Cai, Rong-Gen (ITP, China)

Chen, Chiang-Mei (Natl Central U, Taiwan)

Frolov, Valeri (U Alberta, Canada)

Gal'tsov, Dmitri (Moscow S U, Russia)

Giacomini, Alex (Universidad Austral de Chile, Chile)

Hsu, Jong-Ping (U Mass Dartmouth, USA)

Kenmoku, Masakatsu (Nara WU, Japan)

Kim, Sung-Won (Ewha WU, Korea)

Laemmerzahl, Claus (U Bremen, Germany)

Luo, Jun (Sun Yat-sen U, China)

Ni, Wei-Tou (Nat’l Tsing Hua U, Taiwan)

Paik, Ho Jung (U Maryland, USA)

Reula, Oscar (Ciudad U, Argentina)

Ruffini, Remo (ICRA, Italy)

Triay, Roland (CNRS, France) 

Wiltshire, David L (Canterbury U, NZ)

Yoon, Jong Hyuk (Konkuk U, Korea)

International Advisory Committee 

Abishev, Medeu (Al-Farabi Kazakh NU) 

Ashtekar Abhay (Penn State U)

Bang, Yoonkyu (APCTP; Co-chair)

Brill, Dieter (U Maryland; Chair)

Cai, Rong-Gen (ITP, Beijing)

Chen, Chiang-Mei (Natl Central U, Taiwan) 

Doeleman, Sheperd (Harvard U, USA)

Gal'tsov, Dmitri (Moscow S U, Russia)

Sijie Gao (Beijing Normal U, China) 

Kim, Sung-Won (Ewha WU, Korea)

Lee, Hyungmok (Seoul NU, Korea)

Nicolai, Hermann (AEI Potsdam, Germany)

Pinfold, James (U Alberta, Canada) 

Reula, Oscar (Universidad Nacional de Cordoba, Argentine)

Ruffini, Remo (ICRA, Italy)

Sasaki, Misao (IPMU, Tokyo, Japan)

Scott, Susan (ANU, Canberra, Australia) 

Starobinsky, Alexei (Landau Inst Moscow, Russia) 

Scientific Committee

Abishev, Medeu (Al-Farabi Kazakh NU, KZ) 

Chen,Bin (Beijing U, China)

Chen, Chiang-Mei (Natl Central U, Taiwan)

Coe, Dan (STSCI, USA)

Conklin, John (U Florida, USA)

Doelemann, Sheperd (Harvard U, USA)

Evnin, Oleg  (Chulalongkorn U, Thailand) 

Gal'tsov, Dmitri (Moscow S U, Russia)

Gong, Jinn-Ouk (Ewha Womans U, Korea)

Im, Myungshin (SNU, Korea)

Kang, Gungwon (Chung-Ang U, Korea)

​Kim, Chunglee (Ewha WU, Korea) 

Kim, Hyeong-Chan (Korea Natl U Transportation, Korea)  

Kim, Sung-Won (Ewha WU, Korea)

Kokeyama, Keiko (Cardiff U, UK)

Laemmerzahl, Claus (U Bremen, Germany)

Lee, Jae-Weon (Jungwon U, Korea)

Lin, Shih-Yuin (Nat'l Changhua U Edu, Taiwan) 

Lu, Hong (Tianjin U, China) 

Nguyen, Ai Viet (Vietnam NU, Vietnam)

Ni, Wei-Tou (Nat’l Tsing Hua U, Taiwan)

Paik, Ho Jung (U Maryland, USA) 

Park, Seong Chan (Yonsei U, Korea)

Reula, Oscar (Universidad Nacional de Cordoba, Argentine)

Ruffini, Remo (ICRA, Italy)

Scopel, Stefano  (CQUeST, Korea)  

Shafieloo, Arman (KASI, Korea)

Sijie, Gao (Beijing Normal U, China)

Sushkov,Sergey (Kazan FU, Russia) 

Wiltshire, David L (Canterbury U, NZ)

Zhang, Pengming (Sun Yat-sen U, China) 

Local Organizing Committee

Gwak, Bogeun (Dongguk U) 

Kim, Hyeong-Chan (Korea Natl U Transportation, Co-Chair) 

Kim, Chunglee (Ewha WU)

Kim, Sung-Won (Ewha WU, Co-Chair) 

Lee, Wonwoo (Sogang U) 

Oh, Seung Hun (Tech U Korea)

Yeom, Donghan (Pusan NU)