Physics & Astronomy - Astronomy Seminar - Trystan Lambert, Univ. of Cape Town

Dartmouth Events

Physics & Astronomy - Astronomy Seminar - Trystan Lambert, Univ. of Cape Town

Title: "Revealing Groups In and Around the Zone of Avoidance Using the Completed 2MASS Redshift Survey"

Thursday, July 19, 2018
2:00pm-3:00pm
Wilder 202
Intended Audience(s): Public
Categories: Lectures & Seminars

Abstract: The 2MASS Redshift Survey has produced a catalog which has been integral to the mapping of large scale structures in the local Universe. Until recently, the catalog was missing roughly 1,000 redshift measurements, nearly all at low galactic latitudes. This incompletion was due to the difficulty of observing in the Zone of Avoidance (ZoA), a region which is subject to extremely high stellar densities and crippling extinction. Thanks to observations collected over the course of several observing runs since 2013, these missing redshifts have been measured. Running a modified Friends of Friends algorithm on this improved catalog has resulted in the deepest and most complete 2MRS group catalog to date, up to about 12,800 km/s. It includes 59 new groups not seen in previous catalogs, the overwhelming majority of which lie near the ZoA.

For more information, contact:
Tressena Manning
603-646-2854

Events are free and open to the public unless otherwise noted.