# Stellar Parameters for Pulsating B Star Candidates in the Kepler Field

## TL;DR

This study provides accurate stellar parameters for 25 pulsating B star candidates in the Kepler field using spectroscopic data, revealing significant discrepancies with catalog values and improving understanding of these stars.

## Contribution

The paper presents spectroscopic measurements of stellar parameters for B star candidates, highlighting discrepancies with existing catalog data and refining stellar property estimates.

## Key findings

- Spectroscopic parameters differ significantly from catalog values.
- Derived stellar radii and luminosities improve star characterization.
- Extinction values are consistent with zero for high-latitude stars.

## Abstract

The field of asteroseismology has enjoyed a large swath of data coming from recent missions (e.g., CoRoT, Kepler, K2). This wealth of new data has allowed the field to expand beyond the previous limitation of a few extremely bright and evolved stars. Asteroseismology relies on accurate surface measurements for boundary conditions, but the predicted physical parameters in the Kepler Input Catalog (KIC) are unreliable for hot stars. We present stellar parameters of 25 candidate pulsating B star candidates in the Kepler field. We use blue optical spectra to measure the projected rotational velocity (V sini), effective temperature (Teff), and surface gravity (logg) using TLUSTY and Kurucz ATLAS9 model atmospheres. We find a large discrepancy between our spectroscopically derived parameters and those derived from photometry in the KIC and Gaia Data Release 2 (DR2). Using spectral energy distributions, we also measure the radii of these stars and later calculate the luminosities and masses. We find the extinctions (AV ) of these stars to be consistent with zero, which is expected for stars of high Galactic latitude.