Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.407.1070m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 407, Issue 2, pp. 1070-1077.
Astronomy and Astrophysics
Astronomy
Stars: Agb And Post-Agb, Binaries: Symbiotic, Stars: Individual: Llcas
Scientific paper
Accurate BVRCIC light and colour curves of the Mira variable in the dust-free symbiotic system K4-46 are presented and discussed. They cover several consecutive pulsations cycles. The Mira mean period is 284.2d, the reddening sums to E(B - V) = 0.35 and the distance is 10kpc. Absolute spectrophotometry at both maximum and minimum brightness of the Mira is presented. The rich emission line and continuum spectrum of the HII region ionized by the hard radiation of the white dwarf dominates at Mira minimum. From its photoionization analysis, it is found that the HII region extends to a radius of 210au, has a mass 1.8 × 10-4 Msolar and it is ionized by a white dwarf of 158000K temperature and 0.06Rsolar radius, stably burning hydrogen at its surface. The derived [Fe/H] = -0.45 well match the ambient metallicity expected at K4-46 at its 15kpc galactocentric distance, and the overabundances in N, Ne and He are those expected if the HII region is fed by the wind of the Mira and polluted by nuclearly processed material lost by the white dwarf companion.
Dallaporta Sandrine
Frigo A.
Munari Ulisse
Siviero Alessandro
No associations
LandOfFree
The dust-free symbiotic MiraK4-46 = LLCas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The dust-free symbiotic MiraK4-46 = LLCas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The dust-free symbiotic MiraK4-46 = LLCas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1504472