重力波研究交流会

GW research exchange meeting

• What is GW REM? （重力波研究交流会とは?）

• Useful Links

• How to receive announcements

Upcoming GW-REMs

The 103rd REM: December

• Time: 13:00-14:00
• Speaker: TBA
  • Title: TBA

  • Link to the material will be here

The 102nd REM: November 15th, 2019, Friday

• Time: 13:00-14:00
• Location: ICRR, the Kashiwanoha campus (tentative)
• Speaker: Kyohei Kawaguchi (ICRR, University of Tokyo)

  • Title: "Modeling gravitational waveforms and electromagnetic signals from neutron star binary mergers"

  • Link to the material will be here

The past GW REM talks

The 101st REM / ISAS Astrophysics Colloquium : August 9th, 2019, Friday

• Time: 13:00-14:00
• Location: Room 1537, Bild.A, 5F in JAXA Sagamihara campus
• Speaker: Morio Toyoshima (NICT)

  • Title: "Recent Trends of Space Laser Communications"

  • a link to the material (password protected)

• Information for Zoom remote connection

  • Meeting URL: https://zoom.us/j/5045179604

  • password: ask an organizer

• Jointly organized with the ISAS Astrophysics Colloquia

The 100th REM: July 12th, 2019, Friday

• Time: 13:00-14:00
• Speaker: Shoichi Oshino (ICRR, the University of Tokyo)

  • Title: "A review on BBH formations in N-body simulations"

  • pdf

  • Abstract:

    Since the first gravitational wave was detected by LIGO, several BH merging events have already been observed. However, the process of BBH formation is still unclear. Here, I introduce studies that use N-body simulations to investigate BBH formation by gravitational interactions in star clusters.

• Zoom connection information

  • Meeting URL: https://zoom.us/j/5045179604

  • password: ask the organizers

The 99th REM: June 14th, 2019, Friday

• Time: 13:00-14:00
• Speaker: Hisaaki Shinkai (Osaka Inst. Tech.)

  • Title: "INO: Interplanetary Network of Optical Lattice Clocks"

  • ref: Int. J. Mod. Phys. D. (2019) https://doi.org/10.1142/S0218271819400029 or arXiv:1809.10317

  • slide pdf

  • Abstract

    The new technique of measuring frequency by optical lattice clocks now approaches to the relative precision of (\Delta f/f)=O(10^{-18}). We propose to place such precise clocks in space and to use Doppler tracking method for detecting low-frequency gravitational wave below 1 Hz. Our idea is to locate three satellites at one A.U. distance (say at L1, L4 & L5 of the Sun-Earth orbit), and apply the Doppler tracking method by communicating ``the time" each other. Applying the current available technologies, we obtain the sensitivity for gravitational wave with three or four-order improvement (h_{n}\sim 10^{-17} or 10^{-18} level in 10^{-5} Hz -- 1 Hz) than that of Cassini satellite in 2001. This sensitivity enables us to observe black-hole mergers of their mass greater than 10^5 M_\odot in the cosmological scale. Based on the hierarchical growth model of black-holes in galaxies, we estimate the event rate of detection will be 20-50 a year. We nickname "INO" (Interplanetary Network of Optical Lattice Clocks) for this system, named after Tadataka Ino (1745--1818), a Japanese astronomer, cartographer, and geodesist.

• Zoom connection information

  • Meeting URL: https://zoom.us/j/5045179604

  • password: ask the organizers

The 98th REM: May 17th, 2019, Friday

• Time: 13:00-14:00
• Speaker: Federico Paoletti and Irene Fiori (European Gravitational Observatory)

  • Title: "Virgo environmental status"

  • pdf

• Zoom connection information

  • Meeting URL: https://zoom.us/j/5045179604

  • password: ask the organizers

Archives for the past talks

• Most of the archives for the earlier years are written in Japanese (it is a history!).

  • 101-110th GW-REM talks (2019-)

  • 91-100th GW-REM talks (2017-2019)

  • 81-90th GW-REM talks (2016-2017)

  • 71-80th GW-REM talks (2014-2015)

  • 61-70th GW-REM talks (2013-2014)

  • 51-60th GW-REM talks (2012-2013)

  • 41-50th GW-REM talks (2011-2012)

  • 31-40th GW-REM talks (2010-2011)

  • 21-30th GW-REM talks (2009-2010)

  • 11-20th GW-REM talks (2008-2009)

  • 1-10th GW-REM talks (2007-2008)

Useful links

• How to upload presentation materials to JGW doc database

• How to use Zoom

• Use of EVO remote connection system (written in Japanese)

• How to join KEK community in eZuce

How to receive the announcements

• One has to subscribe to the mailing list called gw_comm in order to receive our announcement emails. Please ask one of our organizers for subscription.

• The organizers can be found in this page.