# TESS Program G08096

Title: Measuring Masses And Radii Of Low-Metallicity Eclipsing Binaries In The Southern Sky

PI: Rowan, Dominick - Ohio State University

Type: SMALL

Summary: We propose to combine TESS photometry and ground-based spectroscopy to measure masses and radii of 60 low-metallicity eclipsing binaries (EBs). Detached EBs are the most effective tool to measure precise masses and radii of stars. These measurements are widely used to calibrate stellar models, characterize exoplanet host stars, and understand stellar populations in galaxies. However, current catalogs have a critical gap in the sample of metal-poor EBs. We have identified 72 metal-poor ([Fe/H] < -1.0) EB candidates in the Southern sky. We propose to use TESS light curves and ground-based radial velocities from CHIRON to dynamically measure the masses and radii of 60 systems. In doing so, we will improve models for metal-poor stars and empirical relations between stellar properties.


# Sector 097 targets observed (2 min: 6, 20 s: 0)
167458680,17.772,-14.0898,11.36,G08096;G08158
72729777,34.3238,-26.4308,11.32,G08096
146689695,43.5128,-47.5934,11.67,G08096
197882909,56.5205,-56.1248,11.67,G08096
38586438,64.0891,-62.0134,11.67,G08096;G08158
281636697,116.9363,-60.7183,11.44,G08096;G08137

# Sector 098 targets observed (2 min: 3, 20 s: 0)
298769313,69.1638,-5.2451,12.5,G08096
38586438,64.0891,-62.0134,11.67,G08096;G08158
364537633,71.2558,-77.2235,10.79,G08096

# Sector 099 targets observed (2 min: 14, 20 s: 0)
409797166,126.4636,-16.3797,8.94,G08085;G08096
293522110,142.7793,-13.229,12.4,G08096
265338723,133.4954,0.2956,12.1,G08096
290588609,140.0045,0.0495,12.65,G08096
54361956,161.8956,-30.6359,10.81,G08096
189569821,143.7679,-28.0251,12.62,G08096
152145351,169.9721,-37.0201,11.31,G08096
162585265,170.3404,-47.601,9.3,G08046;G08096;G08158;G08137
29937483,166.4406,-38.356,12.17,G08096
464030037,155.221,-56.2227,11.81,G08096
459812750,163.6149,-58.7157,12.59,G08096
467244015,167.8473,-60.5522,12.52,G08096
21864784,181.8268,-43.7936,12.56,G08096
263775090,231.3809,-67.5537,12.43,G08096