NS 1987A in SN 1987A
arXiv:2004.06078 · doi:10.3847/1538-4357/ab93c2
Abstract
The possible detection of a compact object in the remnant of SN 1987A presents an unprecedented opportunity to follow its early evolution. The suspected detection stems from an excess of infrared emission from a dust blob near the compact object's predicted position. The infrared excess could be due to the decay of isotopes like 44Ti, accretion luminosity from a neutron star or black hole, magnetospheric emission or a wind originating from the spindown of a pulsar, or thermal emission from an embedded, cooling neutron star (NS 1987A). It is shown that the last possibility is the most plausible as the other explanations are disfavored by other observations and/or require fine-tuning of parameters. Not only are there indications the dust blob overlaps the predicted location of a kicked compact remnant, but its excess luminosity also matches the expected thermal power of a 30 year old neutron star. Furthermore, models of cooling neutron stars within the Minimal Cooling paradigm readily fit both NS 1987A and Cas A, the next-youngest known neutron star. If correct, a long heat transport timescale in the crust and a large effective stellar temperature are favored, implying relatively limited crustal n-1S0 superfluidity and an envelope with a thick layer of light elements, respectively. If the locations don't overlap, then pulsar spindown or accretion might be more likely, but the pulsar's period and magnetic field or the accretion rate must be rather finely tuned. In this case, NS 1987A may have enhanced cooling and/or a heavy-element envelope.
21 pages, 6 figures, to be published in ApJ
References in corpus (20)
- Modules for Experiments in Stellar Astrophysics (MESA)
- Shapiro delay measurement of a two solar mass neutron star
- A Massive Pulsar in a Compact Relativistic Binary
- PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
- A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
- Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
- Rapid Cooling of the Neutron Star in Cassiopeia A Triggered by Neutron Superfluidity in Dense Matter
- The Cassiopeia A Supernova was of Type IIB
- A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
- The Evolution of Massive Helium Stars Including Mass Loss
- Strongly paired fermions: Cold atoms and neutron matter
- The Explosion of Helium Stars Evolved With Mass Loss
- Equation of state of superfluid neutron matter and the calculation of pairing gap
- Central Compact Objects in Supernova Remnants
- High angular resolution ALMA images of dust and molecules in the SN 1987A ejecta
- Comparing Neutron Star Kicks to Supernova Remnant Asymmetries
- Three-dimensional distribution of ejecta in Supernova 1987A at 10 000 days
- Very Deep Inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D
- Diffusive nuclear burning in cooling simulations and application to new temperature data of the Cassiopeia A neutron star
- Properties of gamma-ray decay lines in 3D core-collapse supernova models, with application to SN 1987A and Cas A