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[Fizinfo] meghivo

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  • From: Zsolt Szep <QWERT AT>
  • To: ortvay_lista <akos AT>, atj AT, azkiss AT, balazse AT, beleznay AT, et AT, FIZINFO AT lists.kfki.HU, gluon AT, gszabo AT, jzimanyi AT, kaposi AT, kl AT, kroo AT, lovas AT, lpal AT, nagy AT, nemenyim AT, palla AT, pf AT, rad8012 AT, radbiol AT, rgl AT, sebestyen AT, solyom AT, sukosd AT, szepzs AT, tompa AT, vgy AT, zxp AT
  • Subject: [Fizinfo] meghivo
  • Date: Fri Sep 27 15:08:00 2002
  • List-archive: <>
  • List-id: ELFT HRAD <>


2002. oktober 7., hetfo, 10 orakor
Az ELTE Pazmany Peter s. 1/A alatti epuleteben
az 2. emeleti 2.105 szeminariumi szobaban

Roberto Gallino professzor
(Dipartimento di Fisica Generale,
Universita' di Torino (Italy)):

"First generation stars in the Halo"


The chemical composition of very metal poor stars in the Galactic Halo
provides impressive constraints on local heterogeneities in the interstellar
medium from which those stars condensed. At least two different r-process
distributions of heavy elements have been ascertained, a solar scaled
r-process composition for elements from Ba to Pb, and a distinct odd-even
r-process distribution in lighter elements from Ru to Pd. The few
observations of transuranic elements (Th, U) so far available raise the
possibility of a third r-process component beyond the magic neutron number
at N = 126.
Elements at the magic neutron peak N = 50, Sr, Y, Zr, cannot be ascribed to
the r process nor to the s process according to the classical theory.
Typical s-process signature is not present in unevolved Halo stars up to
[Fe/H]>-2, in agreement with recent calculations of s-process yields from
AGB stars and Galactic Chemical Evolution results.

Attachment: MEGHIVO.DOC
Description: Binary data

  • [Fizinfo] Meghivo, Udvardi Laszlo, 09/10/2002
    • <Possible follow-up(s)>
    • [Fizinfo] meghivo, Zsolt Szep, 09/27/2002

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