2013ApJ...767....5K

Query : 2013ApJ...767....5K

2013ApJ...767....5K - Astrophys. J., 767, 5 (2013/April-2)

Production of 9Be through the α-fusion reaction of metal-poor cosmic rays and stellar flares.

KUSAKABE M. and KAWASAKI M.

Abstract (from CDS):

Spectroscopic observations of metal-poor stars have indicated possible 6Li abundances that are much larger than the primordial abundance predicted in the standard big bang nucleosynthesis model. Possible mechanisms of 6Li production in metal-poor stars include pregalactic and cosmological cosmic-ray (CR) nucleosynthesis and nucleosynthesis by flare-accelerated nuclides. We study 9Be production via two-step α-fusion reactions of CR or flare-accelerated ^3, 4^He through 6He and ^6, 7^Li, in pregalactic structure, intergalactic medium, and stellar surfaces. We solve transfer equations of CR or flare particles and calculate nuclear yields of 6He, ^6, 7^Li, and 9Be taking account of probabilities of processing 6He and ^6, 7^Li into 9Be via fusions with α particles. Yield ratios, i.e., 9Be/6Li, are then calculated for the CR and flare nucleosynthesis models. We suggest that the future observations of 9Be in metal-poor stars may find enhanced abundances originating from metal-poor CR or flare activities.

Abstract Copyright: ∼

Journal keyword(s): cosmic rays - early universe - nuclear reactions, nucleosynthesis, abundances - stars: abundances - stars: flare - supernovae: general

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 BD+44 493 Pe* 02 26 49.7390353632 +44 57 46.523771136   9.63 9.11 9.073   CEMP-no 116 0

Query : 2013ApJ...767....5K

Basic data :
BD+44 493 -- Chemically Peculiar Star
Other object types: otypes_help 		* (2022AJ,BD,...), Pe* (2013ApJ), PM* (2018yCat), NIR (2MASS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		02 26 49.7390353632 +44 57 46.523771136 (Optical) [ 0.0188 0.0154 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		02 23 36.0835563266 +44 44 20.596120353 [ 0.0188 0.0154 90 ]
Gal coord. (ep=J2000) : 		140.1346245756610 -14.6988893796682 [ 0.0188 0.0154 90 ]
Proper motions mas/yr : 		118.221 -32.068 [0.021 0.020 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -150.445 [0.016] / z(spectroscopic) -0.000502 [0.000000] / cz -150.41 [0.02]
   (Opt) A 2024ApJ...977...12P
Parallaxes (mas): 		4.8661 [0.0226] A 2020yCat.1350....0G
Spectral type: 		CEMP-no C 2019A&A...623A.128H
Fluxes (12) :
B 9.63 [0.02] D 2000A&A...355L..27H
V 9.11 [0.02] D 2000A&A...355L..27H
R 9.073 [0.04] D 2012yCat.1322....0Z
G 8.863496 [0.002778] C 2022yCat.1355....0G
J 7.659 [0.018] C 2003yCat.2246....0C
H 7.269 [0.021] C 2003yCat.2246....0C
K 7.202 [0.020] C 2003yCat.2246....0C
u (AB) 10.691 [0.001] C 2020ApJS..249....3A
g (AB) 9.339 [0.001] C 2020ApJS..249....3A
r (AB) 8.902 [0.001] C 2020ApJS..249....3A
i (AB) 8.653 [0.001] C 2020ApJS..249....3A
z (AB) 9.184 [0.001] C 2020ApJS..249....3A
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Identifiers (17) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD+44 493 HIP 11396 TIC 202872681 Gaia DR3 341511064663637376
AG+44 245 2MASS J02264972+4457464 TYC 2843-1104-1 Gaia DR1 341511060366297856
AP J02264972+4457464 PPM 45086 UCAC4 675-012778
GSC 02843-01104 SAO 38029 uvby98 004400493
HIC 11396 SDSS J022649.77+445746.6 Gaia DR2 341511064663637376

References (116 between 1850 and 2026) (Total 116)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 10    Distance : 2    Rot : 2    Fe/H : 12    Plx : 5    PM : 5    SpT : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : BD+44 493

Link by name to the catalogue in VizieR :

BD+44 493 AG+44 245 AP J02264972+4457464 GSC 02843-01104 HIC 11396
HIP 11396 2MASS J02264972+4457464 PPM 45086 SAO 38029 SDSS J022649.77+445746.6
TYC 2843-1104-1 UCAC4 675-012778 uvby98 004400493 Gaia DR2 341511064663637376 Gaia DR3 341511064663637376
Gaia DR1 341511060366297856

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