TY - JOUR
T1 - Parkes radio and NuSTAR X-ray observations of the composite supernova remnant B0453-685 in the large magellanic cloud
AU - Eagle, Jordan
AU - Hare, Jeremy
AU - Hays, Elizabeth
AU - Castro, Daniel
AU - Gelfand, Joseph
AU - Alnaqbi, Jwaher
AU - Kerr, Matthew
AU - Dai, Shi
AU - Ballet, Jean
AU - Acero, Fabio
AU - Slane, Patrick
AU - Ajello, Marco
PY - 2024
Y1 - 2024
N2 - Gamma-ray emission is observed coincident in position to the evolved, composite supernova remnant (SNR) B0453-685. Prior multiwavelength investigations of the region indicate that the pulsar wind nebula (PWN) within the SNR is the most likely origin for the observed gamma rays, with a possible pulsar contribution that becomes significant at energies below E ∼ 5 GeV. Constraints on the PWN hard X-ray spectrum are important for the most accurate broadband representation of PWN emission and determining the presence of a gamma-ray pulsar component. The results of Parkes radio and Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray observations are presented on PWN B0453-685. We perform a search for the central pulsar in the new Parkes radio data, finding an upper limit of 12 μJy. A pulsation search in the new NuSTAR observations additionally provides a 3σ upper limit on the hard X-ray pulsed fraction of 56%. The PWN is best characterized with a photon index ΓX = 1.91 ± 0.20 in the 3-78 keV NuSTAR data, and the results are incorporated into existing broadband models. Last, we characterize a serendipitous source detected by Chandra and NuSTAR that is considered a new high-mass X-ray binary candidate.
AB - Gamma-ray emission is observed coincident in position to the evolved, composite supernova remnant (SNR) B0453-685. Prior multiwavelength investigations of the region indicate that the pulsar wind nebula (PWN) within the SNR is the most likely origin for the observed gamma rays, with a possible pulsar contribution that becomes significant at energies below E ∼ 5 GeV. Constraints on the PWN hard X-ray spectrum are important for the most accurate broadband representation of PWN emission and determining the presence of a gamma-ray pulsar component. The results of Parkes radio and Nuclear Spectroscopic Telescope Array (NuSTAR) X-ray observations are presented on PWN B0453-685. We perform a search for the central pulsar in the new Parkes radio data, finding an upper limit of 12 μJy. A pulsation search in the new NuSTAR observations additionally provides a 3σ upper limit on the hard X-ray pulsed fraction of 56%. The PWN is best characterized with a photon index ΓX = 1.91 ± 0.20 in the 3-78 keV NuSTAR data, and the results are incorporated into existing broadband models. Last, we characterize a serendipitous source detected by Chandra and NuSTAR that is considered a new high-mass X-ray binary candidate.
KW - High mass x-ray binary stars (733)
KW - Large Magellanic Cloud (903)
KW - Optical astronomy (1776)
KW - Pulsar wind nebulae (2215)
KW - Pulsars (1306)
KW - Radio astronomy (1338)
KW - X-ray astronomy (1810)
UR - http://www.scopus.com/inward/record.url?scp=85209400123&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/ad85ca
DO - 10.3847/1538-4357/ad85ca
M3 - Article
AN - SCOPUS:85209400123
SN - 0004-637X
VL - 975
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 247
ER -