The early spectroscopic evolution of nova V458 Vul (Nova Vulpeculae 2007)

Details The early spectroscopic evolution of nova V458 Vul (Nova Vulpeculae 2007) The early spectroscopic evolution of nova V458 Vul (Nova Vulpeculae 2007)

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ap%26ss.315...79p&link_type=abstract

Astrophysics and Space Science, Volume 315, Issue 1-4, pp. 79-85

Astronomy and Astrophysics

Astrophysics

6

Stars: Novae, Cataclysmic Variables

Scientific paper

The early spectral evolution of the nova V458 Vul has been monitored at the Loiano Observatory, Italy. The nova exhibited a couple of oscillations during the decline from initial maximum. We have performed spectroscopic observations to study the physical properties of the ejected material. The photometric light curve has been used to derive the nova distance and its absolute magnitude at maximum. V458 Vul is a fast nova, with decline rates by two or three magnitudes of 7 and 15 days respectively. The magnitude at maximum is M V =-8.8. The nova distance is in the range 6.7 10.3 kpc. The spectra secured a few days after initial maximum showed emission lines of H I and Fe II, making V458 Vul a Fe II nova at this stage. After the oscillations V458 Vul came back to a standard decline curve, but evolved towards the He/N class. Thus V458 Vul is a hybrid nova.

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