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The Hubble Space Telescope (HST): one user’s view Chris Sneden Speaking for my friends & colleagues: John Cowan (Oklahoma), Jim Truran (Chicago), Tim Beers.

Published bySheena Rosalind Hawkins Modified over 9 years ago

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Presentation on theme: "The Hubble Space Telescope (HST): one user’s view Chris Sneden Speaking for my friends & colleagues: John Cowan (Oklahoma), Jim Truran (Chicago), Tim Beers."— Presentation transcript:

1 The Hubble Space Telescope (HST): one user’s view Chris Sneden Speaking for my friends & colleagues: John Cowan (Oklahoma), Jim Truran (Chicago), Tim Beers (Michigan State), Francesca Primas (ESO)

2 Pictures of HST Very connected with the fate of the shuttle!

3 HST: a thumbnail history?

4 HST has been a spectacular success!

5 Recent (alas!) HST history Late last week Yester- day

6 Back to my comfort zone: using HST while it still lives

7 What can stellar astronomers learn from cool HST images?

8 Halo stars are at the outposts of our Milky Way and other galaxies You are here (sort of)!

9 My goal: to use the chemical compositions of stars to help explain the creation of all the elements in the Periodic Table RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeI ScCaK Xe TiVCrMnFeCoNiCuZnGaGeAsSeBrKr H BeLi MgNa HfTaWReOsIrPtAuHgTlPbBiPoAtRn RaFr BaCs RfDbSgBhHsMt UunUuuUub CBOFNe ArAlSiPSCl N He LaCePrNdPmSmEuGdTbDyHoErTmYbLu AcThPaUNpPuAmCmBkCfEsFmMdNoLr Atomic Numbers 1 3 11 19 37 55 87 57 89 2 10 18 36 54 86 71 103

10 Remember: Periodic Table elements are created in stellar nucleosynthesis Nuclear fusion reactions in the hot & dense interiors of stars synthesis nearly all elements AND they release energy that finally becomes the light we see from stars

11 To deduce the chemical compositions of stars, we must analyze their spectra The basic concept Fortunately, atoms in stellar atmospheres absorb light at selected colors (wavelengths), giving away their existence

12 McDonald’s HET and its High Resolution Spectrograph (HRS) are great tools to study the abundances of SOME elements in stars

13 Some elements cannot be observed from the ground! They only have transitions in the UV RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeI ScCaK Xe TiVCrMnFeCoNiCuZnGaGeAsSeBrKr H BeLi MgNa HfTaWReOsIrPtAuHgTlPbBiPoAtRn RaFr BaCs RfDbSgBhHsMt UunUuuUub CBOFNe ArAlSiPSCl N He LaCePrNdPmSmEuGdTbDyHoErTmYbLu AcThPaUNpPuAmCmBkCfEsFmMdNoLr Atomic Numbers 1 3 11 19 37 55 87 57 89 2 10 18 36 54 86 71 103

14 Overall HST schematic I

15 Overall HST schematic II

16 Overall HST schematic III

17 HST STIS: just like any simple spectrograph!

18 Life isn’t fair: a typical HST beautiful image

19 My beautiful HST STIS image?

20 But there really is a treasure here … Blowup this and study

21 And you cannot do this without HST

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