Low State, Phase-Resolved IR Spectroscopy of VV Puppis

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dc.creatorHowell, Steve B.
dc.creatorHarrison, Thomas E.
dc.creatorCampbell, Ryan K.
dc.creatorCordova, France A.
dc.creatorSzkody, Paula
dc.date2005-12-13
dc.date.accessioned2026-07-07T11:25:05Z
dc.date.available2026-07-07T11:25:05Z
dc.descriptionWe present phase-resolved low resolution $JHK$ and higher resolution $K$-band spectroscopy of the polar VV Pup. All observations were obtained when VV Pup was in a low accretion state having a K magnitude near 15. The low resolution observations reveal cyclotron emission in the $J$ band during some phases, consistent with an origin near the active 30.5 MG pole on the white dwarf. The secondary in VV Pup appears to be a normal M7V star and we find that the $H$ and $K$ band fluxes are entirely due to this star at all orbital phases during the low accretion state. We use our higher resolution Keck spectroscopy to produce the first $K$-band radial velocity curve for VV Pup. Our orbital solution yields $K_2$=414$\pm27$ km sec$^{-1}$ and leads to mass estimates of M$_1$=0.73$\pm$0.05 M$_{\odot}$ and M$_2$=0.10$\pm$0.02 M$_{\odot}$. We find that the mass accretion rates during the normal low states of the polars VV Pup, EF Eri, and EQ Cet are near 10$^{-13}$ M$_{\odot}$ yr$^{-1}$. The fact that M is not zero in low state polars indicates active secondary stars in these binary systems, including the sub-stellar donor star present in EF Eri.
dc.descriptionAccepted in Astronomical Journal 5 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0512339
dc.identifierhttp://arxiv.org/abs/astro-ph/0512339
dc.identifierAstron.J.131:2216-2222,2006
dc.identifierdoi:10.1086/500540
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195402
dc.subjectAstrophysics
dc.titleLow State, Phase-Resolved IR Spectroscopy of VV Puppis
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