Dark Passengers in Stellar Surveys
Almog Yalinewich, Paz Beniamini, Kenta Hotokezaka, Wei Zhu
TL;DR
This paper develops models to predict and analyze the detection of binary systems with a luminous star and a compact object using Gaia and Hipparcos data, providing insights into black hole and neutron star formation.
Contribution
It introduces stellar population models that forecast the number of detectable binaries with luminous companions and compact objects in Gaia and Hipparcos surveys, aiding understanding of their formation.
Findings
Dozens of BHLC binaries predicted for Gaia
Hundreds to thousands of NSLC binaries predicted for Gaia
Single BHLC detection in Hipparcos data
Abstract
We develop stellar population models to predict the number of binaries with a single luminous member is Gaia and Hipparcos. Our models yield dozens of detections of black hole - luminous companion binaries (BHLC) and hundreds to thousands of neutron star - luminous companion binaries (NSLC) with Gaia. Interestingly, our models also yield a single detection of BHLC binary with Hipparcos, and a few NSLC binaries. We also show how the statistical distribution of detected binaries with a single luminous companion can be used to constrain the formation process of neutron stars and black holes.
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