Published April 1, 2020 | Version v1
Journal article Metadata-only

A 1201 s Orbital Period Detached Binary: The First Double Helium Core White Dwarf LISA Verification Binary

Creators

  • 1. Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 (United States)
  • 2. Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 West Brooks Street, Norman, OK 73019 (United States)
  • 3. Département de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Quebec H3C 3J7 (Canada)

Description

We report the discovery of a 1201 s orbital period binary, the third shortest-period detached binary known. Sloan Digital Sky Survey J232230.20 + 050942.06 contains two He-core white dwarfs orbiting with a 27° inclination. Located 0.76 kpc from the Sun, the binary has an estimated Laser Interferometer Space Antenna (LISA) 4 yr signal-to-noise ratio of 40. J2322 + 0509 is the first He + He white dwarf LISA verification binary, a source class that is predicted to account for one-third of resolved LISA ultra-compact binary detections.

Availability note (English)

Available from http://dx.doi.org/10.3847/2041-8213/ab8228

Additional details

Identifiers

DOI
10.3847/2041-8213/ab8228;

Publishing Information

Journal Title
Astrophysical Journal Letters
Journal Volume
892
Journal Issue
2
Journal Page Range
[5 p.]
ISSN
2041-8205

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
52052846
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
DETECTION; HELIUM; INTERFEROMETERS; SIGNAL-TO-NOISE RATIO; SPACE; WHITE DWARF STARS
Descriptors DEC
DIMENSIONLESS NUMBERS; DWARF STARS; ELEMENTS; FLUIDS; GASES; MEASURING INSTRUMENTS; NONMETALS; RARE GASES; STARS