Modeling Asteroseismic Yields for the Roman Galactic Bulge Time-Domain Survey

Abstract

The Galactic Bulge Time Domain Survey (GBTDS) of the Roman Space Telescope will take high cadence data of the Galactic bulge. We investigate the asteroseismic potential of this survey for red giants. We simulate the detectability of global asteroseismic frequencies, ${\nu }_{\max }$ and $\Delta \nu$, by modify ing Kepler data to match nominal GBTDS observing strategies, considering different noise models, observing cadences, and detection algorithms. Our baseline case, using conservative assumptions, consistently leads to asteroseismic ${\nu }_{\max }$ detection probabilities above 80% for red clump and red giant branch stars brighter than 16th magnitude in Roman's F146 filter. We then inject these detection probabilities into a Galaxia model of the bulge to estimate asteroseismic yields. For our nominal case, we detect 290,000 stars in total, with 185,000 detections in the bulge. Different assumptions give bulge yields from 135,000 to 349,000 stars. For stars with measured ${\nu }_{\max }$, we find that we can recover $\Delta \nu$ in 21% to 42% of red clump stars, and 69% to 92% of RGB stars. Implications for survey strategy and asteroseismic population studies are discussed more.

ApJ, in press

References in corpus (19)

• Array Programming with NumPy
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• Gaia Data Release 3: Summary of the content and survey properties
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• A Guide to Realistic Uncertainties on Fundamental Properties of Solar-Type Exoplanet Host Stars
• The Gaia-Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age
• Oscillating K giants with the WIRE satellite: determination of their asteroseismic masses
• The K2 Galactic Archaeology Program Data Release 1: Asteroseismic results from Campaign 1
• APOKASC-3: The Third Joint Spectroscopic and Asteroseismic catalog for Evolved Stars in the Kepler Fields
• The PLATO field selection process I. Identification and content of the long-pointing fields
• Period spacings in red giants; III. Coupling factors of mixed modes
• A Search for Red Giant Solar-like Oscillations in All Kepler Data
• A prescription for the asteroseismic surface correction
• The Ages of Galactic Bulge Stars with Realistic Uncertainties
• A variational encoder-decoder approach to precise spectroscopic age estimation for large Galactic surveys
• Automated extraction of oscillation parameters for Kepler observations of solar-type stars
• The far side of the Galactic bar/bulge revealed through semi-regular variables
• Vetting Asteroseismic $\Delta \nu$ Measurements using Neural Networks
• Testing the wavelength dependence of oscillations and granulation in red giants using Kepler and TESS

Cited by in corpus (5)

• A Homogeneous Catalog of Oscillating Solar-Type Stars Observed by the Kepler Mission and a New Amplitude Scaling Relation Including Chromospheric Activity
• Asteroseismology of red giants in the globular cluster 47 Tuc using the HST
• A Near-Infrared Extinction and Reddening Map Towards the Galactic Bulge Using UKIRT
• Towards Accurate Asteroseismic Masses for Luminous Giants
• The Two-infall Model Revisited: Constraints on Milky Way Bulge Assembly from >30,000 Galactic Chemical Evolution Models and Machine Learning