A New Likely Redback Millisecond Pulsar Binary with a Massive Neutron Star: 4FGL J2333.1–5527. (arXiv:1912.02264v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Swihart_S/0/1/0/all/0/1">Samuel J. Swihart</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Strader_J/0/1/0/all/0/1">Jay Strader</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Urquhart_R/0/1/0/all/0/1">Ryan Urquhart</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Orosz_J/0/1/0/all/0/1">Jerome A. Orosz</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Shishkovsky_L/0/1/0/all/0/1">Laura Shishkovsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chomiuk_L/0/1/0/all/0/1">Laura Chomiuk</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Salinas_R/0/1/0/all/0/1">Ricardo Salinas</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Aydi_E/0/1/0/all/0/1">Elias Aydi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Dage_K/0/1/0/all/0/1">Kristen C. Dage</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kawash_A/0/1/0/all/0/1">Adam M. Kawash</a>
We present the discovery of a likely new redback millisecond pulsar binary
associated with the Fermi $gamma$-ray source 4FGL J2333.1–5527. Using optical
photometric and spectroscopic observations from the SOAR telescope, we identify
a low-mass, main sequence-like companion in a 6.9-hr, highly inclined orbit
around a suspected massive neutron star primary. Archival XMM-Newton X-ray
observations show this system has a hard power-law spectrum $Gamma =
1.6pm0.3$ and $L_X sim 5 times 10^{31}$ erg s$^{-1}$, consistent with
redback millisecond pulsar binaries. Our data suggest that the system harbors a
massive ($1.88pm 0.24,M_{odot}$) neutron star whose properties can be much
better constrained with its future detection as a millisecond radio pulsar.
This work shows that a bevy of nearby compact binaries still await discovery,
and that unusually massive neutron stars continue to be common in redbacks.
We present the discovery of a likely new redback millisecond pulsar binary
associated with the Fermi $gamma$-ray source 4FGL J2333.1–5527. Using optical
photometric and spectroscopic observations from the SOAR telescope, we identify
a low-mass, main sequence-like companion in a 6.9-hr, highly inclined orbit
around a suspected massive neutron star primary. Archival XMM-Newton X-ray
observations show this system has a hard power-law spectrum $Gamma =
1.6pm0.3$ and $L_X sim 5 times 10^{31}$ erg s$^{-1}$, consistent with
redback millisecond pulsar binaries. Our data suggest that the system harbors a
massive ($1.88pm 0.24,M_{odot}$) neutron star whose properties can be much
better constrained with its future detection as a millisecond radio pulsar.
This work shows that a bevy of nearby compact binaries still await discovery,
and that unusually massive neutron stars continue to be common in redbacks.
http://arxiv.org/icons/sfx.gif
