Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Impact of a revised $^{25}$Mg(p,$\gamma$)$^{26}$Al reaction rate on the
  operation of the Mg-Al cycle   Proton captures on Mg isotopes play an important role in the Mg-Al cycle
active in stellar H-burning regions. In particular, low-energy nuclear
resonances in the $^{25}$Mg(p,$\gamma$)$^{26}$Al reaction affect the production
of radioactive $^{26}$Al$^{gs}$ as well as the resulting Mg/Al abundance ratio.
Reliable estimations of these quantities require precise measurements of the
strengths of low-energy resonances. Based on a new experimental study performed
at LUNA, we provide revised rates of the $^{25}$Mg(p,$\gamma$)$^{26}$Al$^{gs}$
and the $^{25}$Mg(p,$\gamma$)$^{26}$Al$^{m}$ reactions with corresponding
uncertainties. In the temperature range 50 to 150 MK, the new recommended rate
of the $^{26}$Al$^{m}$ production is up to 5 times higher than previously
assumed. In addition, at T$=100$ MK, the revised total reaction rate is a
factor of 2 higher. Note that this is the range of temperature at which the
Mg-Al cycle operates in an H-burning zone. The effects of this revision are
discussed. Due to the significantly larger $^{25}$Mg(p,$\gamma$)$^{26}$Al$^{m}$
rate, the estimated production of $^{26}$Al$^{gs}$ in H-burning regions is less
efficient than previously obtained. As a result, the new rates should imply a
smaller contribution from Wolf-Rayet stars to the galactic $^{26}$Al budget.
Similarly, we show that the AGB extra-mixing scenario does not appear able to
explain the most extreme values of $^{26}$Al/$^{27}$Al, i.e. $>10^{-2}$, found
in some O-rich presolar grains. Finally, the substantial increase of the total
reaction rate makes the hypothesis of a self-pollution by massive AGBs a more
robust explanation for the Mg-Al anticorrelation observed in Globular-Cluster
stars.

5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat