DOI: 10.5281/zenodo.10901389
title: APOGEE likely binaries with estimated companion masses

description: This Zenodo has an assortment of data files related to Schochet, Tayar & Andrews (2024) "A Lack of Mass-Gap Compact Object Binaries in APOGEE" which sought to identify binary systems with a single stellar component that may be host to a "mass-gap" black hole/neutron star companion. These files utilize data from the Sloan Digital Sky Survey IV's (Blanton et al. 2017) Apache Point Galactic Evolution Experiment (Majewski et al. 2017) Data Release 17 (Abdurro'uf et al. 2022), including stellar abundances from the ASPCAP pipeline (Garcia Perez et al. 2016) and with spectra reduced using the Doppler (Nidever et al. 2015). Radius values used in the catalog come from Gaia + SED fitting (Yu et al. 2023).  

In this repository you will find:

Files



APOGEE_likely_binaries.csv: datafile contains basic information and IDs for the 4751 likely binary objects from our data reductions (2MASS ID, SNR, nvisits, vsini, vscatter, teff, log(g), M/H and errors for the final 3 stellar parameters).

For systems with a radius value from Yu et al. 2023 (4288/4751), we also provide:



apogee_objects_with_kiauhoku_masses.csv: this file contains masses and ages from the four grids of kiauhoku (Claytor et al. 2020) which include models from MIST (MESA Isochrones and Stellar Tracks, Choi et al. 2016 & Paxton et al. 2010), YREC (Yale Rotating stellar Evolution Code, Tayar et al. 2022 & Pinsonneault et al. 1989) Dart/DSEP (Dartmouth Stellar Evolution Program, Dotter et al. 2008), and GARSTEC/Gars (Garching Stellar Evolution Code, Serenelli et al. 2013 & Weiss & Schlattl 2008). These are in the final columns of the csv file, and other columns include Gaia IDs, APOGEE starflag and ASPCAP flags, and RA/Dec along with APOGEE Telescope and Field information for each target.

estimated_companions.csv: this file contains estimated minimum companion masses from the tidal synchronization method (CO_mass_rsync) and Joker method (CO_mass_joker) used in Schochet et al., and velocity semi-amplitude, eccentricity, and period values from the Joker (K_joker, e_joker, P_joker; Price-Whelan et al. 2017).




 

Programs



spectra_replotter.ipynb: This program replots spectra from the APOGEE servers when given a 2MASS ID, Field, and the telescope (APO/LCO) used for a specific observed object.  It will then print out an image of that object's spectra with the apVisit/asVisit files (pre-RV-shift reduction) plotted above the apStar/asStar files (post-RV-shift reduction) so that radial velocity shifts can be quickly identified by eye


 

 

Notes

estimated_companions.csv and apogee_objects_with_kiauhoku_masses.csv contain Fiber Dispersion in their data frames, as a reference to the observed trend that vscatter tends to be much lower for objects with 0 fiber dispersion, while objects with fiber dispersion > 0 show larger vscatters, in case there is future focus on investigating this phenomena 

 

Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS web site is www.sdss4.org.

SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian (CfA), the Chilean Participation Group, the French Participation Group, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatório Nacional / MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.