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Time Domain and Multi-Messenger Astrophysics

The Astro2020 Decadal Survey recommended an investment in Time Domain and Multi-Messenger Astrophysics (TDAMM) as the top-priority sustaining activity in space for the coming decade.

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About TDAMM SIG

Time-Varying and Multi-Messenger Phenomena

TDAMM observations include characterization of exoplanet host stars, variable stars, fast radio bursts, and the regions closely surrounding supermassive black holes, to mention just a few.

A pair of distant galaxies that form the rough shape of an infinity symbol seen at roughly a 45-degree angle. Two overlapping, fuzzy rings with brighter blue patches are at upper right and lower left. At the center of each ring is a bright yellow blob, which is the nucleus. Where the two rings overlap on the left side, there is a mottled green patch of glowing gas midway between the two yellow nuclei. It is offset slightly to the left. Orange contours are overlaid on the galaxies. The contours are egg-shaped and centered on the green patch between the two galaxies.
This image of the Infinity Galaxy from NASA’s James Webb Space Telescope’s NIRCam is overlayed with a contour map of data from the Very Large Array radio telescope. The center pinpoint of radio emission perfectly lines up with the center of the glowing gas detected in the infrared in between the two nuclei of the galaxies. The detection of radio emission from supermassive black holes informs researchers about the energetics of the object, specifically how it is pulling in surrounding material.
NASA, ESA, CSA, STScI, VLA, P. van Dokkum (Yale University)

This relatively new field burst onto the scene with the detection of neutrinos and photons from SN 1987A, and entered a new era in 2017, with the first detection of a binary neutron star merger, GW 170817 / GRB 170817A, in both gravitational waves and across the electromagnetic spectrum, and the second strong association between an astrophysical neutrino, IceCube-170922A, and a known source, the blazar TXS 0506+056. The field’s potential continues to grow as searches for electromagnetic counterparts to GW events continue and with the high-significance detection of neutrino emission from the galaxy NGC 1068.

Tasks for the TDAMM SIG may include any of the following:

  1. Provide analysis and feedback to NASA on the impact of the Astronomy & Astrophysics Decadal Survey on the subfield.
  2. Identify and articulate “science gaps”: gaps between the current state of knowledge in the subfield and the goals outlined by the Decadal Survey that require new data in order to fully define new missions (precursor gaps), prepare for approved missions that are in development (preparatory gaps), and maximize the science return from current missions (follow-up gaps).
  3. Serve as ambassadors to facilitate communications between NASA and the science community. In particular, act as the interface to relevant TDAMM communities outside NASA’s immediate sphere, e.g., ground-based observers, physics facilities.
  4. Engage in scientific discussions and exchange of ideas through meetings and seminars to make best use of NASA assets for current research and to assist NASA in strategic planning in TDAMM activities.
  5. Propose and organize TDAMM sessions at conferences and arrange other public meetings as appropriate.
  6. Establish and disseminate best practices for conducting TDAMM science, for missions both in development and in operations, and for observers and investigators, including in regards to sharing and citing data in an era of open data.

TDAMM SIG Membership

Membership in the TDAMM SIG is open to the national and international scientific community without regard to institutional affiliation, education, or career status.

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TDAMM SIG Terms of Reference

Aug 1, 2025

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News & Events
Time Domain and Multi-Messenger Astrophysics Science Interest Group (TDAMM SIG)

This relatively new field burst onto the scene with the detection of neutrinos and photons from SN 1987A, and entered a new era in 2017, with the first detection of a binary neutron star merger, GW 170817 / GRB 170817A,…

Aug 25, 2025
Topic
TDAMM SIG Meeting July 19, 2024

Enabling Time-domain Science for Roman with RAPID Jacob Jencson, IPAC/Caltech RAPID (Roman Alerts Promptly from Image Differencing) is a project infrastructure team for the Roman Space Telescope.

Jul 19, 2024
Topic
TDAMM SIG Seminar Mar 01, 2024

TDAMM SIG Meeting Friday, March 1, 2024 2:00 PM Eastern Time (US & Canada) The first virtual meeting of the Cross-PAG Time-Domain and MultiMessenger (TDAMM) SIG will be on Friday, March 1st, at 2pm EST. We will begin our ~monthly…

Mar 1, 2024
Topic

Leadership Council

NameInstitution
Rebekah HounsellUMBC / GSFC
Brad CenkoNASA / GSFC
Brian GrefenstetteCaltech
Christos PanagiotouMIT

How to Participate

We invite participation from the community, particularly from early-career researchers and those from under represented backgrounds in astronomy. Please contact us for more information about our activities and mission, and how you can get involved.

Contact Us about How to Participate
Webb and Hubble�s Views of Spiral Galaxy NGC 628

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An illustration of Sun-like star HD 181327 and its surrounding debris disk. The star is at top right. It is surrounded by a far larger debris disk that forms an incomplete ellpitical path and is cut off at right. There’s a huge cavity between the star and the disk. The debris disk is shown in shades of light gray. Toward the top and left, there are finer, more discrete points in a range of sizes. The disk appears hazier and smokier at the bottom. The star is bright white at center, with a hazy blue region around it. The background of space is black. The label Artist's Concept appears at lower left.