Colloquium Abstract - Sjouwerman - 2025Jan31

January 31, 2025

11:00am Mountain

Lorant Sjouwerman (NRAO)

 

The Bulge Asymmetries and Dynamical Evolution Survey (BAaDE)

 

Abstract

The Bulge Asymmetries and Dynamic Evolution (BAaDE) project aims to significantly improve models of the structure and dynamics of the inner Galaxy. The goal is to probe into regions not reachable with optical and nIR sampling of the Galactic Bulge and Plane by performing an SiO maser survey in evolved AGB stars. These CSE masers reveal the stellar line-of-sight kinematics and can be used as point-mass particles in dynamical modeling representing the older stellar populations. The survey will be complementary to many other surveys, either because of very limited overlap (e.g., sampling different types of objects) or by providing additional information (e.g., providing velocities). The project also includes novel studies to obtain relatively accurate stellar distances in order to derive general stellar properties like bolometric and maser luminosities. The BAaDE survey, by itself or in combination with approximate distances, will yield a wealth of data allowing many different studies and statistical analysis on AGB stars, CSEs and SiO maser modeling and occurrence. Here we will showcase our data and highlight some of the early results.


Local Host: TBD

Connect with NRAO

The NSF National Radio Astronomy Observatory and NSF Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

Founded in 1956, the NSF NRAO provides state-of-the-art radio telescope facilities for use by the international scientific community. NSF NRAO telescopes are open to all astronomers regardless of institutional or national affiliation. Observing time on NSF NRAO telescopes is available on a competitive basis to qualified scientists after evaluation of research proposals on the basis of scientific merit, the capability of the instruments to do the work, and the availability of the telescope during the requested time. NSF NRAO also provides both formal and informal programs in education and public outreach for teachers, students, the general public, and the media.

The U.S. National Science Foundation (U.S. NSF) is an independent federal agency created by Congress in 1950 "to promote the progress of science; to advance the national health, prosperity, and welfare; to secure the national defense..."

AUI collaborates with the scientific community and research sponsors to plan, build, and operate cutting-edge facilities. We cultivate excellence, deliver value, enhance education, and engage the public.