장소 | Seminar Room (C303), Creation Hall (3F), KAIST Munji Campus |
---|---|
일시 | Thursday, December 14, 2017 at 3:00 pm |
연사 | Chunglee Kim (KASI) |
Since 2015, the advanced LIGO (Laser Interferometer Gravitational-wave Observatory) in USA and the advanced Virgo in Europe have been successfully discovering black holes and neutron stars via gravitational waves (GWs) in cosmological distances. After the original discovery of a black hole binary (BBH, GW150914) by LIGO, more BBHs are confirmed. The observed waveform of GWs from BBH coalescences (inspiral-merger-ringdown phases) are well described by Einstein's general relativity as well as approximations. LIGO-Virgo's another major breakthrough was thr discovery of GW170817. It is the first extragalactic neutron star - neutron star binary (NS-NS). It turned out that GW170817 is a progenitor of GRB170817A (independently discovered by the Fermi space telescope). Within 24 hrs since the discovery of GW170817, extensive international observation campaign were made using electromagnetic waves (from gamma rays to radio) as well as neutrinos. GW170817 will be recorded as one of the most successful global multi-messenger effort. With the discoveries of BBHs and NS-NS by LIGO and Virgo, GW astronomy has truly begun. The next decades will be a golden era for stellar astrophysics and many surprises are expected. Furthermore, cosmology with GWs seems also promising. Distance measure by GWs for GW170817 (at 40 Mpc) is already powerful enough to put constraints on the Hubble constant. In future, there will be a global network of GW observatories on Earth and in space and broader frequency ranges will be accessible in GWs. In this talk, I will present the highlights of GW astronomy and astrophysics based the LIGO-Virgo observations so far. I will also discuss the prospects of multi-messenger astronomy.
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
368 | Apr. 28 (Thu.) 3PM | #2501(E6-2. 2nd fl.) | Dr. Chang Hee Sohn, SEOUL NATIONAL UNIVERSITY | Lattice/Spin/Charge Coupling in 5d Pyrochlore Cd2Os2O7 |
367 | December 13 (Fri.), 1:00 PM | #2501, E6-2 | Dr. Chang-Jong Kang |
Computational Material Designs: Current Status and Future Directions
![]() |
366 | Sep. 4 (Tue), 02:30 PM | E6-2. 2st fl. #2502 | Dr. Changmin Lee, MIT |
Ultrafast time- and angle-resolved photoemission spectroscopy (tr-ARPES) with extreme ultraviolet laser pulses
![]() |
365 | Apr. 08 (Fri.), 4:00 PM | E6-2. 5st fl. #1501 | Dr. Changyoung Kim, SEOUL NATIONAL UNIV. | Spectroscopic studies of iron-based superconductors : what have we learned? |
364 | Oct. 07 (Fri), 4:00 PM | E6-2. #1323(1st fl.) | Dr. Choong Hyun Kim,IBS-CCES, Seoul National University | “Tilt engineering of 4d and 5d transition metal oxides?” |
363 | Oct. 16 (Fri.), 02:30 PM | https://kaist.zoom.us/j/89198078609 | Dr. Chulki Kim |
Nanoscale magnetic resonance detection towards nano MRI
![]() |
362 | 2015/12/02, 4PM | E6-2, #1323 | Dr. Dae-Jeong Kim (Dept. of Physics and Astronomy, University of California, Irvine) | Samarium Hexaboride: Is it a Topological insulator? |
361 | Oct. 16 (Fri.), 04:00 PM | https://kaist.zoom.us/j/89198078609 | Dr. Daesu Lee |
Hidden room-temperature ferroelectricity in CaTiO3 revealed by a metastable octahedral rotation pattern
![]() |
360 | 2015/11/19, 4PM | E6-2, #1323 | Dr. Daesu Lee (University of Wisconsin-Madison) | Emergent Collective Phenomena and Functions at Reduced Dimensions |
359 | May 16, 2016 (Mon) 4PM | #1323(E6-2, 1st Fl.) | Dr. Daniel Bowring , Fermi National Accelerator Laboratory | Tuning microwave cavities with biased nonlinear dielectrics for axion searches |
358 | Oct. 12 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Daniel Kyungdeock Park |
Quantum Advantage in Learning Parity with Noise
![]() |
357 | June 22 (Fri.), 04:00 PM | #1323, E6-2 | Dr. Daniel Sando |
Tuning functional properties of BiFeO3 films using strain and growth chemistry
![]() |
356 | June 22 (Fri.), 04:00 PM | #1323, E6-2 | Dr. Daniel Sando |
Tuning functional properties of BiFeO3 films using strain and growth chemistry
![]() |
355 | September 5 (Wed.), 16:00 PM | #1323, E6-2 | Dr. Dirk Wulferding |
Shining a light on fractional excitations
![]() |
354 | March 18(Fri.) 11:00 | Online seminar | Dr. Dirk Wulferding (IBS-Center for Correlated Electron Systems, Seoul National University, Seoul) |
(응집물리 세미나) Illuminating exotic states of matter: Raman spectroscopy as an experimental tool to characterize quantum spin liquids
![]() |
353 | Mar 2 (Tue.), 16:00 | Online | Dr. Dmitry Svintsov |
Sensitive terahertz detection with graphene-based transistors
![]() |
352 | Nov. 20 (Fri.), 04:00 PM | Online | Dr. Dohun Kim | Coherent control of field gradient induced quantum dot spin qubits |
351 | Nov. 04 (Fri), 3:00 PM | E6-2. #1323(1st fl.) | Dr. Dohun Kim, Department of Physics and Astronomy, SNU | Quantum information experiments using few electron spins in semiconductors |
350 | Jan. 17(Mon) - 21 (Fri), 2-4pm | E6-2 Room 2502 | Dr. Donghui Jeong (Penn State University) |
Five Lectures on Observational Probes of Dark Energy
![]() |
349 | Nov. 9 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Donghun Lee |
Quantum sensing and imaging with diamond defect centers for nano-scale spin physics
![]() |