NS 1987A in SN 1987A

Page, Dany; Beznogov, Mikhail V.; Garibay, Iván; Lattimer, James M.; Prakash, Madappa; Janka, Hans-Thomas

doi:10.3847/1538-4357/ab93c2

Title: NS 1987A in SN 1987A

Journal Article · Thu Jul 30 00:00:00 EDT 2020 · The Astrophysical Journal (Online)

DOI:https://doi.org/10.3847/1538-4357/ab93c2· OSTI ID:1800657

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Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico)
Stony Brook Univ., NY (United States)
Ohio Univ., Athens, OH (United States)
Max-Planck-Institut für Astrophysik, Garching (Germany)

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 spin down of a pulsar, or to thermal emission from an embedded, cooling neutron star. In this work 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 that 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 yr 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 do not overlap, then pulsar spin down 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.

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Research Organization:: State Univ. of New York (SUNY), Albany, NY (United States); Ohio Univ., Athens, OH (United States)

Sponsoring Organization:: Consejo Nacional de Ciencia y Tecnología (CONACYT); European Research Council (ERC); German Research Foundation (DFG); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-87ER40317; FG02-93ER40756; 240512; 109520; 341157-COCO2CASA

OSTI ID:: 1800657

Alternate ID(s):: OSTI ID: 1864793

Journal Information:: The Astrophysical Journal (Online), Vol. 898, Issue 2; ISSN 1538-4357

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
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Title: NS 1987A in SN 1987A

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