Marco Pignatari

[Marco Pignatari @MarcoPignatari]

Mi sono appena connesso all'evento Ballarò 13 Novembre - http://t.co/08nEx267

[Marco Pignatari @MarcoPignatari]

#NucATown is it planned to include stellar weak rates in jinalib ?

[Marco Pignatari @MarcoPignatari]

#NucATown A. Davis and presolar grains: 1 presolar grain condensed from 1 star. Chance to test directly stellar nucleosynthesis.

[Marco Pignatari @MarcoPignatari]

#NucATown what about C12+C12 uncertainty, AND uncertainty in relative probability of its nucleosynthesis channels? Impact is known?

[Marco Pignatari @MarcoPignatari]

@HendrikSchatz @RauscherThomas #nucatown we are working in this in Basel. But until we do not do right the AGB, we cannot do this properly

[Marco Pignatari @MarcoPignatari]

@HendrikSchatz #nucatown it critically depends on the neutron capture seeds built up during the accretion. No detailed work in this, yet..

[Marco Pignatari @MarcoPignatari]

#NucATown for Ti44: http://t.co/8k57L85B (The et al. 2006 A&A) Ti44 production is "exceptional"?

[Marco Pignatari @MarcoPignatari]

@HendrikSchatz if solar LEPP=stellar LEPP cannot be nup. If not, can be important, but together with other processes? #nucatown

[Marco Pignatari @MarcoPignatari]

#NucATown need to disentangle solar LEPP and stellar LEPP? Only one process feeding stellar LEPP? weak r is only one of the open options

[Marco Pignatari @MarcoPignatari]

@RemcoZegers cases where the (p,n) is stronger or comparable with (p,g) and/or (p,alpha)? #nucatown

[Marco Pignatari @MarcoPignatari]

@HendrikSchatz grains do not last more than ~ 1 Gyr in the interstellar medium #nucatown

[Marco Pignatari @MarcoPignatari]

#NucATown s-process branching points 2: if beta decay is sensitive to T and rho*ye, then direct info also about thermo-dymanic, convection..

[Marco Pignatari @MarcoPignatari]

#NucATown s-process branching points 1: if beta decay is not sensitive to T, then branching gives info about neutron density only

[Marco Pignatari @MarcoPignatari]

#NucATown solar abundances: comparison between different compilations, nice reference to check: Piersanti et al. 2007, A&A 462

[Marco Pignatari @MarcoPignatari]

#nucatown Ne22+a: to get good yields we need to know them well starting from ~ 0.20-0.25 GK.

[Marco Pignatari @MarcoPignatari]

#nucatown: e.g. Ne22+a: they can help constrain observables to test convection (looking for example at branching points in presolar grains)

[Marco Pignatari @MarcoPignatari]

#NucATown important rates: Ne22(a,g) and Ne22(a,n). We need both.C12+C12 total rate, and its proton and alpha channels at least,O16(n,g)...

[Hendrik Schatz @HendrikSchatz]

what are the most important nuclear reaction rates needed to understand stars? tweet your top choices at #nucatown

[Marco Pignatari @MarcoPignatari]

see you in few days at #NucATown