Upgrade to Pro — share decks privately, control downloads, hide ads and more …

2017 Pasadena Astronomy Postdoc Mixer

3ef87aeb8d713b39b9119be13b92aa3b?s=47 Daniel
May 25, 2017

2017 Pasadena Astronomy Postdoc Mixer

10-minute talk with lots of pretty pictures to stimulate conversations and discussions for the Pasadena Astronomy Postdoc Mixer

3ef87aeb8d713b39b9119be13b92aa3b?s=128

Daniel

May 25, 2017
Tweet

More Decks by Daniel

Other Decks in Science

Transcript

  1. Daniel Lenz, Pasadena Postdoc mixer, May 25 Dust and gas

    in the Milky Way Implications for cosmological foregrounds
  2. Disclaimer

  3. Disclaimer ❖ Just slightly scientific

  4. Disclaimer ❖ Just slightly scientific ❖ Pretty pictures are key!

  5. Disclaimer ❖ Just slightly scientific ❖ Pretty pictures are key!

    ❖ Talk to me about: ❖ HI ❖ Observational multiphase ISM ❖ CIB/CMB component separation ❖ Dust/Reddening ❖ Machine learning, Bayesian models, python, Mac OS
  6. On Galactic HI ❖ Very abundant, easy to detect ❖

    Key to understanding galaxy evolution ❖ How do galaxies replenish their star-formation fuel? ❖ Important for foreground modeling of cosmological signals
  7. On Galactic HI 4 Credit: S. Janowiecki Southern hemisphere: Galactic

    All-Sky Survey (GASS) McClure-Griffiths+ (2009) Kalberla+ (2010, 2015) D. McClenaghan
  8. On Galactic HI 4 B. Winkel Northern hemisphere: Effelsberg-Bonn HI

    Survey (EBHIS) Kerp+ (2011) Winkel+ (2010, 2016)
  9. None
  10. None
  11. Multiphase ISM HI Dust

  12. Multiphase ISM -15.9797 184.878 K km s 1 -1 3.8

    log10 (Rayleighs) -1.00791 1.24339 log10 (Counts) ❖ There is so much more! ❖ No need for more data, just need to be smarter H⍺ -rays CII
  13. WISE Lang (2014), Meisner+ (2016)

  14. WISE Lang (2014), Meisner+ (2016)

  15. The Cosmic Infrared Background

  16. The Cosmic Infrared Background

  17. The Cosmic Infrared Background ❖ Made up from dust in

    star- forming galaxies at z = 1..2 ❖ Used for ❖ cosmic evolution of the star formation rate ❖ tracer of the density field Lagache+ (2005)
  18. CIB: Galactic poles 12 Total FIR intensity

  19. CIB: Galactic poles 12 CIB

  20. Reddening

  21. Reddening ❖ E(B-V) = Extinction in B band - Extinction

    in V band ❖ More dust => larger E(B-V) ❖ E(B-V) maps essential for correcting observations for Galactic reddening ❖ Schlegel, Finkbeiner, Davis (1998) still state-of-the-art
  22. Reddening ❖ E(B-V) = Extinction in B band - Extinction

    in V band ❖ More dust => larger E(B-V) ❖ E(B-V) maps essential for correcting observations for Galactic reddening ❖ Schlegel, Finkbeiner, Davis (1998) still state-of-the-art
  23. Independent SFD corrections -0.01 0.01 SFD - PG10 [mag] -0.01

    0.01 SFD - Model [mag] ❖ Peek & Graves (2010) ❖ Based on elliptical galaxies ❖ Lenz & Hensley (2017, WSNW) ❖ Based on Galactic HI
  24. Thanks! ❖ Talk to me about: ❖ HI ❖ Observational

    multiphase ISM ❖ CIB/CMB component separation ❖ Dust/Reddening ❖ Machine learning, Bayesian models, python, Mac OS