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Effelsberg-Bonn HI Survey (EBHIS)

Jürgen Kerp 1 ,Benjamin Winkel 2 , Nadya Ben Bekhti 1 , Shahram Faridani 1 , Lars Flöer 1 , Peter Kalberla 1 , Daniel Lenz 1 ,Tobias Röhser 1 1 Argelander-Institut für Astronomie 2 Max-Planck-Institut für Radioastronomie. Effelsberg-Bonn HI Survey (EBHIS).

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Effelsberg-Bonn HI Survey (EBHIS)

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  1. Jürgen Kerp1,Benjamin Winkel2, Nadya Ben Bekhti1, Shahram Faridani1, Lars Flöer1, Peter Kalberla1, Daniel Lenz1,Tobias Röhser1 1Argelander-Institut für Astronomie 2Max-Planck-Institut für Radioastronomie jkerp@astro.uni-bonn.de Effelsberg-Bonn HI Survey (EBHIS)

  2. jkerp@astro.uni-bonn.de To make an all-sky survey of Galactic 21-cm emission with a 100m-class telescope has been a dream for many decades, now the dream is finally coming true. anonymous referee

  3. jkerp@astro.uni-bonn.de • 7-beam receiver system • On-the fly observing mode • Fully sampled sky coverage above Dec = -5⁰ • EBHIS observations started in August 2008 • First full sky coverage finished in April 2013!

  4. jkerp@astro.uni-bonn.de EBHIS concept • Galactic and extragalactic HI survey in parallel: • 21.400 square degrees • 100 MHz bandwidth z ≤ 0.07 (270 Mpc) • 14 spectrometer with 16384 spectral channels each • High angular resolution → fully sampled grid 1/44 LAB • Complementary to the Parkes multi-feed survey projects (HIPASS,GASS)

  5. EBHIS concept • HVC 289+33+251 • Brüns & Westmeier 2004, A&A 426, L9 Beam filling is different ! LAB 100-m

  6. jkerp@astro.uni-bonn.de EBHIS concept

  7. jkerp@astro.uni-bonn.de Image: B. Winkel

  8. jkerp@astro.uni-bonn.de EBHIS: extragalactic science prospects

  9. jkerp@astro.uni-bonn.de EBHIS “The HI Nearby Galaxy Survey” Walter et al. 2008, AJ 136, 2563

  10. jkerp@astro.uni-bonn.de EBHIS: THINGS ensemble Kerp et al. 2013, in prep.

  11. jkerp@astro.uni-bonn.de EBHIS: THINGS ensemble Kerp et al. 2013, in prep.

  12. jkerp@astro.uni-bonn.de EBHIS: THINGS ensemble Kerp et al. 2013, in prep.

  13. jkerp@astro.uni-bonn.de EBHIS vs. THINGS: flux comparison I

  14. jkerp@astro.uni-bonn.de THINGS: NGC 3031 (M81) Walter et al. 2008, AJ 136, 2563

  15. jkerp@astro.uni-bonn.de ETHINGS: NGC 3031 (M81) ON-OFF Kerp et al. 2013, in prep.

  16. jkerp@astro.uni-bonn.de ETHINGS: NGC 3031 (M81) Background: EBHIS Inset: THINGS

  17. jkerp@astro.uni-bonn.de ETHINGS: NGC 3031 (M81) Background: EBHIS Inset: THINGS Poster: Shahram Faridani

  18. jkerp@astro.uni-bonn.de EBHIS vs. HyperLeda: flux comparison II

  19. jkerp@astro.uni-bonn.de EBHIS: Milky Way science prospects

  20. jkerp@astro.uni-bonn.de The northern polar cap (LAB) l=90⁰ l=270⁰ b=30⁰

  21. jkerp@astro.uni-bonn.de The northern polar cap (EBHIS) l=90⁰ l=270⁰ b=30⁰

  22. jkerp@astro.uni-bonn.de The northern polar cap (EBHIS) IVC Spur & Arc IVC135+53 Draco IVC 88+56

  23. jkerp@astro.uni-bonn.de The northern polar cap (EBHIS) IVC Spur & Arch IVC135+53 Draco IVC 88+56

  24. jkerp@astro.uni-bonn.de EBHIS-Planck correlation

  25. jkerp@astro.uni-bonn.de EBHIS-Planck correlation (H2 formation) Ph. D. Tobias Röhser

  26. jkerp@astro.uni-bonn.de EBHIS-Planck correlation (H2 formation) Ph. D. Tobias Röhser

  27. jkerp@astro.uni-bonn.de EBHIS-Planck correlation (H2 formation) Poster: Tobias Röhser Ph. D. Tobias Röhser

  28. jkerp@astro.uni-bonn.de The northern polar cap (EBHIS) IVC 88+56 IVC135+53 Draco IVC 88+56

  29. jkerp@astro.uni-bonn.de IVC 135+53 (velocity bridge) Lenz et al., in prep.

  30. jkerp@astro.uni-bonn.de IVC 135+53 (HVC deceleration) Lenz et al., in prep.

  31. jkerp@astro.uni-bonn.de IVC 135+53 (dust-to-gas ratio) -0.43±0.12 dex (Feige 48) Hernandez et al. 2013, submitted Lenz et al., in prep.

  32. jkerp@astro.uni-bonn.de IVC 135+53 (EBHIS-Planck → H2 map) Lenz et al., in prep. Lenz et al., in prep.

  33. jkerp@astro.uni-bonn.de IVC 135+53 (EBHIS-Planck → H2 map) Lenz et al., in prep.

  34. jkerp@astro.uni-bonn.de H2 rain? (HVC triggered IVC H2 formation?) • Towards the northern polar cap we observe about 1∙106Msun @ 500 pc altitude • Say 10% of the mass H2 • Northern polar cap 1sr • Yielding 1∙106MSunof H2 full sky • Free fall time t ~ 106 1 Msun/year (low metallicity) Extent 5 pc distance about 500 pc → 35’ @ 500 pc → 21” @ 50 kpc (LMC/SMC) → 0.3” @ 3.5 Mpc (Ursa Major) “Dark Gas” Wolfire, Hollenbach & McKee 2010, ApJ 716, 1191

  35. jkerp@astro.uni-bonn.de EBHIS products Ph. D. Lars Flöer

  36. jkerp@astro.uni-bonn.de The future: second coverage > 30⁰ Image: B. Winkel

  37. jkerp@astro.uni-bonn.de Thank you! KE757/7-1 to 7-3

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