A 1201 s Orbital Period Detached Binary: the First Double Helium Core White Dwarf LISA Verification Binary. (arXiv:2004.00641v1 [astro-ph.SR])
<a href="http://arxiv.org/find/astro-ph/1/au:+Brown_W/0/1/0/all/0/1">Warren R. Brown</a> (1), <a href="http://arxiv.org/find/astro-ph/1/au:+Kilic_M/0/1/0/all/0/1">Mukremin Kilic</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Bedard_A/0/1/0/all/0/1">A. Bedard</a> (3), <a href="http://arxiv.org/find/astro-ph/1/au:+Kosakowski_A/0/1/0/all/0/1">Alekzander Kosakowski</a> (2), <a href="http://arxiv.org/find/astro-ph/1/au:+Bergeron_P/0/1/0/all/0/1">P. Bergeron</a> (3) ((1) SAO, (2) OU, (3) UMontreal)

We report the discovery of a 1201 s orbital period binary, the third
shortest-period detached binary known. SDSS J232230.20+050942.06 contains two
He-core white dwarfs orbiting with a 27 deg inclination. Located 0.76 kpc from
the Sun, the binary has an estimated 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.

We report the discovery of a 1201 s orbital period binary, the third
shortest-period detached binary known. SDSS J232230.20+050942.06 contains two
He-core white dwarfs orbiting with a 27 deg inclination. Located 0.76 kpc from
the Sun, the binary has an estimated 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.

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