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Forecasting neutron star temperatures: predictability and variability.

Dany Page¹, Sanjay Reddy²

¹Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico D.F. 04510, Mexico.

Physical Review Letters

|February 4, 2014

Summary

This summary is machine-generated.

Scientists can now model neutron star cooling after accretion events. Observations of thermal relaxation in XTE J1701-462 constrain crust physics, predicting future cooling based on core temperature.

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Area of Science:

Astrophysics
Neutron Star Physics
X-ray Astronomy

Background:

Neutron stars are heated by accretion and nuclear reactions in their crusts.
Modeling thermal relaxation is crucial for understanding neutron star evolution.
Key uncertainties involve crustal thermal conductivity, specific heat, and heating rates.

Purpose of the Study:

To model the ongoing thermal relaxation of neutron stars.
To constrain parameters affecting crustal thermal conductivity, specific heat, and heating rates.
To predict the future cooling behavior of neutron stars.

Main Methods:

Developing models for thermal relaxation of neutron stars after accretion events.
Utilizing observations of thermal relaxation to constrain model parameters.
Applying models to the specific case of neutron star XTE J1701-462.

Main Results:

Major uncertainties in models can be reduced by adjusting a few control parameters.
Observations of thermal relaxation provide strong constraints on these parameters.
The future cooling of XTE J1701-462 over 5-30 years is predictable and primarily depends on its core temperature.

Conclusions:

Observed thermal relaxation in neutron stars effectively pins down uncertainties in crust physics.
Future cooling predictions are significantly improved by observational constraints.
Neutron star core temperature is the dominant factor in long-term cooling variability.