week 14 - university of utah€¦ · week 14!1 hw 8 due next thursday by 2pm (upload to canvas)...
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Week 14
!1
HW 8 due next Thursday by 2pm (upload to Canvas)
Project Reports Due April 24th at 3pm
Final exam last day of class: April 21st Made available @2pm, due back by 4pm
Accretion & Binary Systems (Ch. 14) | SMBHs/AGNs & Particle Acceleration
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Accretion Disks
!2
Thin Disk Thick Disk
Fig. 14.6 Fig. 14.10
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Binary Accretion - the Roche lobe
!3
Figure 14.11
L1-5: Lagrange points JWST / eROSITA /
Athena orbits
Lines reflect equipotential surfaces given by:
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
2 Modes of Binary Accretion
!4Donor star OB type with mass loss ~10-5 Msun /yr
Donor star evolves to red giant
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13 !5
Fig. 14.14
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Cataclysmic Variables
!6
Fig. 14.16
side view
top down view
Fig. 14.19
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Low Mass X-ray Binaries
!7
Fig. 14.21
Optically thick absorbing material before it collapses
into disk (large absorbing columns
seen, keeps disk thick)
X-ray emitting corona fills Roche lobe, above/below
disk (eclipses are gradual, so emitting volume large)
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
Black Hole X-ray Binaries
!8
Done et al. 2007
Hard bandpass needed to distinguish
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13
BH XRBs: “Turtle” or “q” Diagram
!9
Bender et al. 2004
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ASTR/PHYS 5590: High Energy Astrophysics Spring 2020: Week 13 !10
Hardness 1 Hardness 1
Har
dnes
s 2
S: 4-6 keV M: 6-12 keV H: 12-25 keV
NuSTAR Hardness(color)-Intensity Diagram