Using SCUBA-2 to Probe Variability in X-ray Binary Jets Dr. Alex - - PowerPoint PPT Presentation

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Using SCUBA-2 to Probe Variability in X-ray Binary Jets Dr. Alex - - PowerPoint PPT Presentation

Dec 20, 2023 18 likes •129 views

Using SCUBA-2 to Probe Variability in X-ray Binary Jets Dr. Alex Tetarenko East Asian Observatory Studying Jets in X-ray Binaries Modeling the Time Domain broad-band spectra ? 10 1 10 3 10 5 10 7 10 9 10 11 Frequency (GHz) Tetarenko et al.

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SLIDE 1

Using SCUBA-2 to Probe Variability in X-ray Binary Jets

  • Dr. Alex Tetarenko

East Asian Observatory

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SLIDE 2

Alex Tetarenko – UH Labs

Studying Jets in X-ray Binaries

Tetarenko et al. 2019

Modeling the broad-band spectra

101 103 105 107 109 1011

Frequency (GHz)

Time Domain

?

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SLIDE 3

What can we learn from time domain studies of jet emission?

  • Map out the jet size scale
  • Probe jet geometry, beyond what we can

accomplish with high resolution imaging

  • Measure compact jet speed
  • Probe the connection between the accretion

flow and the jet

Alex Tetarenko – UH Labs

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SLIDE 4

V404 Cygni - June 2015 Outburst

  • On June 15, 2015 X-ray flaring activity detected

by Swift BAT, MAXI and INTEGRAL

  • Extraordinary mutli-wavelength flaring activity

followed

  • Brightest BHXB outburst in the past decade

Rare, bright accretion state Close Proximity Well-known system parameters

Alex Tetarenko – UH Labs

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SLIDE 5

The Golden Data Set

Unprecedented multi- wavelength view (9 different frequencies!)

+ + + =

VLA JCMT SMA

VLBA

Alex Tetarenko – UH Labs

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SLIDE 6

Alex Tetarenko – UH Labs

The Golden Data Set: PART 1

Tetarenko et al., 2017

Time on 2015/06/22 (HH:MM)

  • Flares reach extremely

bright flux levels

  • Lower ν are delayed,

smoothed version of higher ν

  • (Sub-)mm substructure

not visible in cm emission

Extreme Flaring!

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SLIDE 7

The Golden Data Set: PART 2

Alex Tetarenko – UH Labs

Credit: J. Miller-Jones Miller-Jones et al. 2019, Nature in press

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SLIDE 8

Jet Accretion Disk

Twin Bi-polar Ejection Model

Not To Scale!

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SLIDE 9

Lab Procedure

  • Reduce a time-resolved JCMT SCUBA-2
  • bservation of V404 Cygni during the extreme

flaring activity of its 2015 outburst.

  • Make a movie of the extreme flux changes in

V404 Cygni.

  • Work to connect jet variability properties with

internal jet physics; e.g., energy, power, and magnetic field strength.

Alex Tetarenko – UH Labs

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SLIDE 10

Alex Tetarenko – UH Labs

Additional Notes

  • Follow the detailed procedure in the lab

writeup for creating a time domain data cube.

  • You will NEED to FIRST download the data!
  • You will NEED to have the Starlink software

installed on your machine.

  • All coding and analysis should be done in the

jupyter notebook provided.

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SLIDE 11

What do you need to hand in?

  • Please email me your lab writeup, gif movie,

and jupyter notebook

  • Please use the subject line: UH Labs XRB

Variability – [NAME]

  • My email is: a.tetarenko@eaobservatory.org
  • Questions? – Email me!

Alex Tetarenko – UH Labs

Thanks!