SLIDE 1
neutron star basics
A solar mass consists of ~ 1057 nucleons. If they are separated by typical inter-nucleon distances, what would the radius of the volume containing them be?
neutron star basics
∼ ·
- / ∼
- ≈
- ≈ . ≈ ∆λ
λ
neutron star basics A solar mass consists of ~ 10 57 nucleons. If - - PowerPoint PPT Presentation
neutron star basics A solar mass consists of ~ 10 57 nucleons. If - - PowerPoint PPT Presentation
neutron star basics A solar mass consists of ~ 10 57 nucleons. If they are separated by typical inter-nucleon distances, what would the radius of the volume containing them be? neutron star basics
SLIDE 2
SLIDE 3
from nuclei to bulk matter
E A ≈ −aV + aSA−1/3 + aA N − Z N + Z ⇥2 + aC Z2 A4/3
SLIDE 4
Thermodynamics near saturation density
see review by Lattimer & Prakash
= . − = /( + ), = = . ε(, ) = ε() + ε()( − ).
SLIDE 5
Why so neutron-rich?
β µ = µ − µ = ∂ε ∂
- −
∂ε ∂
- =
−∂ε ∂ = ε( − ). µ = (π)/, =
- + π
- ε
- −
≈ . ε =
SLIDE 6
SLIDE 7
µe kT, mec2 Z2e2 a kT
SLIDE 8
µe kT, mec2 Z2e2 a kT
SLIDE 9
µe kT, mec2 Z2e2 a kT
SLIDE 10
➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ ➤ O (8) F (9) Ne (10) Na (11) Mg (12) Al (13) Si (14) P (15) S (16) Cl (17) Ar (18) K (19) Ca (20) Sc (21) Ti (22) V (23) Cr (24) Mn (25) Fe (26) Co (27) Ni (28)
S n (MeV) 9 18
8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48
Z ↑
crust reactions
Sato ’79; Haensel & Zdunk ’90; Gupta et al. ’07; Steiner ’12; Schatz et al. ‘13; Lau et
- al. (in prep)
illustration with a simple liquid-drop model (Mackie & Baym ’77, following Haensel & Zdunik ’90) pycnonuclear reactions neutron drip
SLIDE 11
Many of these reactions are within reach of FRIB
SLIDE 12
Disordered nuclear pasta, magnetic field decay, and crust cooling in neutron stars
- C. J. Horowitz,1, ∗ D. K. Berry,2 C. M. Briggs,1 M. E. Caplan,1 A. Cumming,3 and A. S. Schneider1
1Department of Physics and Center for the Exploration of Energy and Matter,
Indiana University, Bloomington, IN 47405, USA
2University Information Technology Services, Indiana University, Bloomington, IN 47408, USA 3Department of Physics, McGill University, 3600 rue University, Montreal QC, H3A 2T8 Canada
(Dated: October 9, 2014)