Galaxies SIG Seminar, 2 Nov 2026
NASA Science ·
Roman eXtreme Deep Field (RXDF): What it is and What it Will Do. Speaker: Haojing Yan The post Galaxies SIG Seminar, 2 Nov 2026 appeared first on NASA Science .
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Location Virtual
2 November 2026 1:00pm ET
Galaxies SIG
Seminar
Haojing Yan
This talk introduces the Roman eXtreme Deep Field (RXDF) program that has been allocated 386.41 hours in Cycle 1-2 of the Roman Space Telescope. The program will do extremely deep imaging in an area close to the North Ecliptic Pole (NEP) to depths comparable to the Hubble eXtreme Deep Field (HXDF) in ACS+WFC3/IR but over 140x larger area in size, reaching 5-sigma limits of AB = 30 mag in RZYJH, 29 mag in F and 28 mag in K. Thanks to its large, contiguous area (687 arcmin2 embedded within 1243 arcmin2), the RXDF will be minimally impacted by the cosmic variance and will be ideal for the clustering analysis of rare objects that needs large volumes for statistics (e.g., galaxies/AGNs at z>10). The RXDF will enable a slew of unprecedented studies on galaxies and accreting SMBHs from the cosmic “dawn” to “noon” to “afternoon”. The RXDF is also designed to exploit Roman’s full potential in time-domain science. The observations will be spitted into three major epochs separated by ~1 year, and each major epoch is further divided into three sub-epochs that are ~10-12 days apart. One major focus of the RXDF time-domain science is supernovae (SNe) at z>2.5 including first-star SNe. The RXDF will also enable a broader range of science topics, including the studies of Galactic brown dwarfs and moving objects in our Solar system.
Zoom link for seminars: https://mit.zoom.us/j/94534544920?pwd=eYKqu4YY1jr5RSRPAFYV5OSwalbhZ8.1
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The post Galaxies SIG Seminar, 2 Nov 2026 appeared first on NASA Science .