Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae

K. Farouqi; C. Freiburghaus; K. L. Kratz; B. Pfeiffer; T. Rauscher; Friedrich-Karl Thielemann

doi:10.1016/j.nuclphysa.2005.05.187

Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae

K. Farouqi, C. Freiburghaus, K. L. Kratz, B. Pfeiffer, T. Rauscher, Friedrich-Karl Thielemann

Centre for Astrophysics Research (CAR)

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called "neutrino-wind" scenario of core-collapse type II supernovae (SNII). We have started our calculations after the total photo disintegration of the matter above the nascent neutron star at 9 (.) 101 Kelvin with protons and neutrons. We have used the charged-particle network of Thielemann and the r-process code of Freiburghaus, combined with the NON-SMOKER neutron-capture rates of Rauscher, nuclear masses from the ETFS1-Q mass model and recent experimental and theoretical gross beta-decay properties. Using the three parameters V-exp (expansion speed of the shock wave), S (entropy of the bubble) and the neutron-to-proton ratio Y-e, we show that the above quantities have to fulfill specific conditions in order to make a successful r-process. According to observations and hydrodynamical simulations, respectively, a realistic value for V-exp is 7500 km/s, and Y-e

Original language	English
Pages (from-to)	631C-634C
Number of pages	4
Journal	Nuclear Physics A
Volume	758
DOIs	https://doi.org/10.1016/j.nuclphysa.2005.05.187
Publication status	Published - 25 Jul 2005
Event	8th International Symposium on Nucle in the Cosmos (NIC8) - Vancouver, Canada Duration: 19 Jul 2004 → 23 Jul 2004

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10.1016/j.nuclphysa.2005.05.187

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@article{5c9d5053bc9c4ff0a90ba70e9dc77573,

title = "Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae",

abstract = "Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called {"}neutrino-wind{"} scenario of core-collapse type II supernovae (SNII). We have started our calculations after the total photo disintegration of the matter above the nascent neutron star at 9 (.) 101 Kelvin with protons and neutrons. We have used the charged-particle network of Thielemann and the r-process code of Freiburghaus, combined with the NON-SMOKER neutron-capture rates of Rauscher, nuclear masses from the ETFS1-Q mass model and recent experimental and theoretical gross beta-decay properties. Using the three parameters V-exp (expansion speed of the shock wave), S (entropy of the bubble) and the neutron-to-proton ratio Y-e, we show that the above quantities have to fulfill specific conditions in order to make a successful r-process. According to observations and hydrodynamical simulations, respectively, a realistic value for V-exp is 7500 km/s, and Y-e ",

author = "K. Farouqi and C. Freiburghaus and Kratz, {K. L.} and B. Pfeiffer and T. Rauscher and Friedrich-Karl Thielemann",

year = "2005",

month = jul,

day = "25",

doi = "10.1016/j.nuclphysa.2005.05.187",

language = "English",

volume = "758",

pages = "631C--634C",

journal = "Nuclear Physics A",

issn = "0375-9474",

publisher = "Elsevier",

note = "8th International Symposium on Nucle in the Cosmos (NIC8) ; Conference date: 19-07-2004 Through 23-07-2004",

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TY - JOUR

T1 - Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae

AU - Farouqi, K.

AU - Freiburghaus, C.

AU - Kratz, K. L.

AU - Pfeiffer, B.

AU - Rauscher, T.

AU - Thielemann, Friedrich-Karl

PY - 2005/7/25

Y1 - 2005/7/25

N2 - Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called "neutrino-wind" scenario of core-collapse type II supernovae (SNII). We have started our calculations after the total photo disintegration of the matter above the nascent neutron star at 9 (.) 101 Kelvin with protons and neutrons. We have used the charged-particle network of Thielemann and the r-process code of Freiburghaus, combined with the NON-SMOKER neutron-capture rates of Rauscher, nuclear masses from the ETFS1-Q mass model and recent experimental and theoretical gross beta-decay properties. Using the three parameters V-exp (expansion speed of the shock wave), S (entropy of the bubble) and the neutron-to-proton ratio Y-e, we show that the above quantities have to fulfill specific conditions in order to make a successful r-process. According to observations and hydrodynamical simulations, respectively, a realistic value for V-exp is 7500 km/s, and Y-e

AB - Within a full dynamical parameter study including freezeout effects, we have determined the astrophysical conditions for an r-process in the so-called "neutrino-wind" scenario of core-collapse type II supernovae (SNII). We have started our calculations after the total photo disintegration of the matter above the nascent neutron star at 9 (.) 101 Kelvin with protons and neutrons. We have used the charged-particle network of Thielemann and the r-process code of Freiburghaus, combined with the NON-SMOKER neutron-capture rates of Rauscher, nuclear masses from the ETFS1-Q mass model and recent experimental and theoretical gross beta-decay properties. Using the three parameters V-exp (expansion speed of the shock wave), S (entropy of the bubble) and the neutron-to-proton ratio Y-e, we show that the above quantities have to fulfill specific conditions in order to make a successful r-process. According to observations and hydrodynamical simulations, respectively, a realistic value for V-exp is 7500 km/s, and Y-e

U2 - 10.1016/j.nuclphysa.2005.05.187

DO - 10.1016/j.nuclphysa.2005.05.187

M3 - Article

SN - 0375-9474

VL - 758

SP - 631C-634C

JO - Nuclear Physics A

JF - Nuclear Physics A

T2 - 8th International Symposium on Nucle in the Cosmos (NIC8)

Y2 - 19 July 2004 through 23 July 2004

ER -

Astrophysical conditions for an r-process in the high-entropy wind scenario of type II supernovae

Abstract

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