Detailed X-Ray Mapping of the Shocked Ejecta and Circumstellar Medium in the Galactic Core-Collapse Supernova Remnant G292.0+1.8

Abstract

G292.0+1.8 (G292) is a young ($\sim$3000 yr), Galactic textbook-type core-collapse supernova remnant (CCSNR). It is characterized by X-ray, optical and infrared emission from ejecta and circumstellar medium (CSM) features, and contains a pulsar (PSR J1124-5916) and pulsar wind nebula that have been observed in X-rays and radio. Previous studies have revealed a complex, dynamically evolving, oxygen-rich remnant, a striking relic from the explosion of a massive star. Here, using our deep (530 ks) $\text{Chandra}$ ACIS data, we present high spatial-resolution maps (based on a regional grid size of a few arcsec) of the shocked CSM and metal-rich ejecta in G292. We make the first $\text{Chandra}$-detection of Fe-rich ejecta in G292. We identify the X-ray counterpart of the northern equatorial belt, a component of a ring-like CSM structure identified earlier in the infrared band. We show the detailed spatial distributions of ejecta enriched in O, Ne, Mg, Si, S and Fe. We find that the bulk of the Si, S and Fe-rich X-ray-emitting ejecta are located in the northwestern hemisphere of the remnant, opposite to the pulsar's projected angular displacement to the southeast from the SNR's center. This suggests that the pulsar's kick may have originated from gravitational and hydrodynamic forces during an asymmetric explosion, rather than from anisotropic neutrino emission. Based on abundance ratios and our estimated CSM and ejecta masses, we constrain the progenitor mass to 13 M${}_{\odot }$ $\lesssim$ M $\lesssim$ 30 M${}_{\odot }$

7 tables and 15 figures. Accepted December 26, 2018, for publication in ApJ

References in corpus (21)

• Pre-Supernova Evolution of Massive Single and Binary Stars
• Spectropolarimetry of Supernovae
• Asymmetries in core-collapse supernovae from maps of radioactive ${}^{44}$Ti in CassiopeiaA
• A non-spherical core in the explosion of supernova SN 2004dj
• Neutron star kicks by the gravitational tug-boat mechanism in asymmetric supernova explosions: progenitor and explosion dependence
• Time-Integrated Searches for Point-like Sources of Neutrinos with the 40-String IceCube Detector
• Discriminating the Progenitor Type of Supernova Remnants with Iron K-Shell Emission
• Discovery of a 112 ms X-ray Pulsar in Puppis A: Further Evidence of Neutron Stars Weakly Magnetized at Birth
• Multiple ring nebulae around blue supergiants
• Comparing Neutron Star Kicks to Supernova Remnant Asymmetries
• Chandra Observes the End of an Era SN 1987A
• A Half-Megasecond Chandra Observation of the Oxygen-Rich Supernova Remnant G292.0+1.8
• X-ray Emitting Ejecta in Puppis A Observed with Suzaku
• The most massive progenitors of neutron stars: CXO J164710.2-455216
• The Kinematic and Plasma Properties of X-ray Knots in Cassiopeia A from the Chandra HETGS
• Supernova remnants with magnetars: clues to magnetar formation
• The Outer Shock of the Oxygen-Rich Supernova Remnant G292.0+1.8: Evidence for the Interaction with the Stellar Winds from its Massive Progenitor
• X-ray ejecta kinematics of the Galactic core-collapse supernova remnant G292.0+1.8
• A Detailed Archival CHANDRA Study of the Young Core-Collapse Supernova Remnant 1E 0102.2-7219 in the Small Magellanic Cloud
• The Cold Dust Content of the Oxygen-Rich Supernova Remnant G292.0+1.8
• High Spatial Resolution Spectroscopy of G292.0+1.8 with Chandra