TY - JOUR
T1 - The MAVERIC Survey
T2 - A Transitional Millisecond Pulsar Candidate in Terzan 5
AU - Bahramian, Arash
AU - Strader, Jay
AU - Chomiuk, Laura
AU - Heinke, Craig O.
AU - Miller-Jones, James C.A.
AU - Degenaar, Nathalie
AU - Tetarenko, Alexandra J.
AU - Tudor, Vlad
AU - Tremou, Evangelia
AU - Shishkovsky, Laura
AU - Wijnands, Rudy
AU - Maccarone, Thomas J.
AU - Sivakoff, Gregory R.
AU - Ransom, Scott
N1 - Funding Information:
We gratefully acknowledge support from NSF grant AST-1308124. J.S. was partially supported by the Packard Foundation. A.J.T., C.O.H., and G.R.S. are supported by NSERC Discovery Grants, and C.O.H. is also supported by a Discovery Accelerator Supplement. A.J.T. is supported by a Natural Sciences and Engineering Research Council of Canada (NSERC) Post-Graduate Doctoral Scholarship (PGSD2-490318-2016). J.C.A.M.-J. is the recipient of an Australian Research Council Future Fellowship (FT140101082). N.D. is supported by a Vidi grant awarded by the Netherlands Organization for Scientific Research (NWO). E.T. acknowledges financial support from the UnivEarthS Labex program of Sorbonne Paris Cité (ANR-10-LABX-0023 and ANR-11-IDEX-0005-02). The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - Transitional millisecond pulsars are accreting millisecond pulsars that switch between accreting X-ray binary and millisecond radio pulsar states. Only a handful of these objects have been identified so far. Terzan 5 CX1 is a variable hard-X-ray source in the globular cluster Terzan 5. In this paper, we identify a radio counterpart to CX1 in deep Very Large Array radio continuum data. Chandra observations over the last 14 years indicate that CX1 shows two brightness states: in 2003 and 2016 the source was the brightest X-ray source in the cluster (at L X ∼ 1033 erg s-1), while in many intermediate observations, its luminosity was almost an order of magnitude lower. We analyze all available X-ray data of CX1, showing that the two states are consistent with the spectral and variability properties observed for the X-ray active and radio pulsar states of known transitional millisecond pulsars. Finally, we discuss the prospects for the detection of CX1 as a radio pulsar in existing timing data.
AB - Transitional millisecond pulsars are accreting millisecond pulsars that switch between accreting X-ray binary and millisecond radio pulsar states. Only a handful of these objects have been identified so far. Terzan 5 CX1 is a variable hard-X-ray source in the globular cluster Terzan 5. In this paper, we identify a radio counterpart to CX1 in deep Very Large Array radio continuum data. Chandra observations over the last 14 years indicate that CX1 shows two brightness states: in 2003 and 2016 the source was the brightest X-ray source in the cluster (at L X ∼ 1033 erg s-1), while in many intermediate observations, its luminosity was almost an order of magnitude lower. We analyze all available X-ray data of CX1, showing that the two states are consistent with the spectral and variability properties observed for the X-ray active and radio pulsar states of known transitional millisecond pulsars. Finally, we discuss the prospects for the detection of CX1 as a radio pulsar in existing timing data.
KW - X-rays: binaries
KW - accretion, accretion disks
KW - globular clusters: individual (Terzan 5)
KW - stars: neutron
UR - http://www.scopus.com/inward/record.url?scp=85053152621&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/aad68b
DO - 10.3847/1538-4357/aad68b
M3 - Review article
AN - SCOPUS:85053152621
SN - 0004-637X
VL - 864
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 28
ER -