1 / 16

composition of proto-planetary discs regarding ingredients for starting life on planets

composition of proto-planetary discs regarding ingredients for starting life on planets. [GALLO/GETTY]. Jane Greaves, Cardiff University. in the SPICA era. low-mass planets of moderate temperature common shift to: what are conditions like on these planets?. ARIEL Space Mission.

gershom
Download Presentation

composition of proto-planetary discs regarding ingredients for starting life on planets

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. composition of proto-planetary discs regarding ingredients for starting life on planets [GALLO/GETTY] Jane Greaves, Cardiff University

  2. in the SPICA era • low-mass planets of moderate temperature common • shift to: what are conditions like on these planets?

  3. ARIEL Space Mission • detecting biosignature gases in an atmosphere is incredibly hard...

  4. ingredients • what gases, ices and minerals are available in discs for planet formation, and where, and for how long? Planetary Systems and Star Formation with JWST G. H. Rieke

  5. close-ups • already see planets and discs interacting • ~1 AU zone is much harder image: Andrews/Dagnello

  6. L. Garvie/CMS • radio interferometry : planets overcoming barriers to formation images: NRAO

  7. PEBBLeS • Planet-Earth Building-Blocks Legacy eMERLIN Survey • tech exists to do this on 1 AU scale: proto-Earths? images: e-MERLIN; E. DRabek-Maunder

  8. next: what is going into planets? • first attempts at astrogeology (Unterborn et al. 2017, e.g.) explore whether planet compositions would allow plate tectonics ( oceans, continents, carbon drawdown....) • what can SPICA and precursors tell us about minerals going into planets?

  9. pushing boundaries • ‘single point failure’ approach: any missing vital ingredient? • e.g. radio-isotopes that keep planet cores warm • e.g. C,H,N,O,P,S elements used by organisms  surveying the phosphorus cycle www.geologyin.com/2016/08/ancient-rocks-suggest-meteorites.html

  10. P for planets • enigmatic at its SNe origins

  11. P in discs • phosphorus delivery to planets and role in origins of life enigmatic too • leading candidate to kick-start P-chemistry on surface is schreibersite • broad features are a challenge for JWST/SPICA combination C. Lisse

  12. Lefloch et al. (2016) • a census of gases, ices and minerals is needed to say how P might be delivered to a range of planets in discs  SPICA, JWST, ALMA • protostar observations suggest P is more abundant where shocks occur • first detection of P-bearing gas in a proto-planetary disc made with ALMA

  13. census for an edge-on disc • PN 2-1 detected in Oph IRS 46

  14. roles for SPICA • SPICA can study the composition and abundance of a wide range of ingredients wanted on planets • completes the links from star-cluster birth environment to accreting planets • hence, whether ingredients involved with origins of life on Earth are present

  15. so we can target maybe a few rare “Earth 2.0’s”

More Related