Erik Tollerud Science Intro (ISM Group)

Transcript

1. Erik Tollerud etollerud@stsci.edu @eteq http://www.stsci.edu/~etollerud/
2. About me • Grew up in Eagan, MN (Hooray snow and cold!) • UGrad: University of Puget Sound in Tacoma, WA (Hooray wet!) • Grad: UC Irvine, Irvine, CA (Hooray… warm?) • Postdoc: Yale University, New Haven, CT (Hooray Pizza!) • Postdoc & Sci Staff: STScI, Baltimore, MD (Hooray Neighborhoods!) • I enjoy hiking/backpacking, travel & nighttime (lucky to be an astronomer…), and nature of all sorts.
3. (Scientific) Identities Topics • Observer ◦ Stellar spectroscopist ▪ Friend of M31 ◦ Optical imaging (imagineer?) ◦ HI survey dabbler • Theorist ◦ Near-field cosmologist ▪ Nature of Dark Matter (the really lowest density universe) ◦ Low mass galaxy simulations • Bayesian Statistician • Python Nerd Finding Local Dwarf Galaxies Reionization Characterizing Local Dwarf Galaxies SAGA Astropy
4. (Scientific) Identities Topics • Observer ◦ Stellar spectroscopist ▪ Friend of M31 ◦ Optical imaging (imagineer?) ◦ HI survey dabbler • Theorist ◦ Near-field cosmologist ▪ Nature of Dark Matter (the really lowest density universe) ◦ Low mass galaxy simulations • Bayesian Statistician • Python Nerd Finding Local Dwarf Galaxies Reionization Characterizing Local Dwarf Galaxies SAGA Astropy
5. Finding Nearby Dwarfs: What do I mean by dwarf galaxy?
6. Finding Nearby Dwarfs: What do I mean by dwarf galaxy?
7. Finding Nearby Dwarfs: Backstory - “Missing Satellites”
8. Finding Nearby Dwarfs: Backstory - “Missing Satellites” | LSST Complete | Zone
9. Finding Nearby Dwarfs: Backstory - “Too Big To Fail”
10. Finding Nearby Dwarfs: Backstory - “Too Big To Fail” Tollerud et al. 2012, 13, 14
11. Finding Nearby Dwarfs: Backstory - “Too Big To Fail” Tollerud et al. 2012, 13, 14, 2x
12. You can do this in M31 too Collins, EJT, + 2019 Gilbert, EJT, + 2018
13. Finding Nearby Dwarfs: DELVE So that gives great reasons for a complete LG faint dwarf census.
14. Finding Nearby Dwarfs: DELVE Main components: • WIDE: “Southern SDSS” (for dwarf galaxies) - talk to Yumi! • DEEP: Searching for “dwarfs of dwarfs” in the outer LG • MC: Magellanic Clouds (I’m less involved, but some of my best friends are Magellanic!) • I am “data processing coordinator” • Now with an STScI Remote Observing room! (RS443)
15. Finding Nearby Dwarfs: DELVE astro-ph:1912.03301
16. Finding Nearby Dwarfs: GALFA Or: J.E.G. Peek’s Home for Wayward Radio and Clueless Optical Astronomers
17. Finding Nearby Dwarfs: GALFA Or: J.E.G. Peek’s Home for Wayward Radio and Clueless Optical Astronomers
18. Finding Nearby Dwarfs: GALFA blobs can be Local dwarfs
19. Finding Nearby Dwarfs: GALFA blobs can be Local dwarfs
20. Finding Nearby Dwarfs: GALFA blobs can be Local dwarfs and in the ZOA! Tollerud et al. 202x
21. Reionization: GALFA Dwarfs are an independent check
22. Reionization: Tollerud & Peek + Leo T
23. Reionization: Tollerud & Peek + Leo T Also Leo T et al. are broadly intereting! Tollerud et al. 2x
24. Satellites Around Galactic Analogs (SAGA) Survey Can we ask all the same questions, but for ~100 MW/M31 analogs at 20-40 Mpc? Beowulf Odyssey w/ Marla Geha, Risa Wechsler, Yao-Yuan Mao
25. Which one is a real satellites @ 20-40 Mpc?
26. Which one is a real satellites @ 20-40 Mpc?
27. Which one is a real satellites @ 20-40 Mpc?
28. SAGA Needs Big Spectra: Virial Radius @ 40 Mpc = 1 deg
29. SAGA Paper 1: LFs ~ LG, but Satellites don’t!
30. SAGA: My Current Focus - Rotation Curves and COS-SAGA Spatial -> Wavelength -> Rowland, EJT et al. 202x Tollerud or other et al. 202x
31. Astropy • I am one of the founders and coordinators of Astropy. • None of the above was possible without it. • I can talk to you about/help you with Python and Open Development of software. • I can talk your ear off about the importance of sharing scientific software, giving credit for science s/w development. • I won’t right now.