Published in
American Astronomical Society, Astrophysical Journal Letters, 1(808), p. L14, 2015
DOI: 10.1088/2041-8205/808/1/l14
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Early Optical Spectra of Nova V1369 Cen Show the Presence of Lithium
,
Massimo Della Valle,
Elena Mason,
Francesca Matteucci ,
Donatella Romano ,
Luca Pasquini,
Leonardo Vanzi,
Andres Jordan,
José Miguel Fernandez,
Paz Bluhm ,
Rafael Brahm ,
Nestor Espinoza ,
Robert Williams
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Abstract
We present early high resolution spectroscopic observations of the nova V1369 Cen. We have detected an absorption feature at 6695.6 Å\, that we have identified as blue--shifted $^7$Li I $λ$6708 Å. The absorption line, moving at -550 km/s, was observed in five high-resolution spectra of the nova obtained at different epochs. On the basis of the intensity of this absorption line we infer that a single nova outburst can inject in the Galaxy $M_{Li} =$ 0.3 - 4.8 $\times 10^{-10}$ M$_{⊙}$. Given the current estimates of Galactic nova rate, this amount is sufficient to explain the puzzling origin of the overabundance of Lithium observed in young star populations. ; Comment: 6 pages, 5 figures, accepted for publication in ApJLetters