Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/7228
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dc.contributor.authorChakradhari, N. K-
dc.contributor.authorSahu, D. K-
dc.contributor.authorAnupama, G. C-
dc.contributor.authorPrabhu, T. P-
dc.date.accessioned2018-01-12T09:13:09Z-
dc.date.available2018-01-12T09:13:09Z-
dc.date.issued2018-02-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 474, No. 2, pp. 2502–2513en_US
dc.identifier.issn1365-2966-
dc.identifier.urihttp://hdl.handle.net/2248/7228-
dc.descriptionRestricted Accessen_US
dc.description.abstractWe present optical photometric and spectroscopic data for supernova SN 2004ab, a highly reddened normal Type Ia supernova. The total reddening is estimated as E(B - V) = 1.70 ± 0.05 mag. The intrinsic decline-rate parameter Δm15(B)true is 1.27 ± 0.05, and the B-band absolute magnitude at maximum MB^{max} is -19.31 ± 0.25 mag. The host galaxy NGC 5054 is found to exhibit anomalous extinction with a very low value of RV = 1.41 ± 0.06 in the direction of SN 2004ab. The peak bolometric luminosity is derived as log L_bol^max = 43.10 ± 0.07 erg s-1. The photospheric velocity measured from the absorption minimum of the Si II λ6355 line shows a velocity gradient of \dot{v} = 90 km s-1 d-1, indicating that SN 2004ab is a member of the high velocity gradient (HVG) subgroup. The ratio of the strengths of the Si II λ5972 and λ6355 absorption lines, R(Si II), is estimated as 0.37, while their pseudo-equivalent widths suggest that SN 2004ab belongs to the broad line (BL) type subgroup.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of the Royal Astronomical Societyen_US
dc.relation.urihttps://doi.org/10.1093/mnras/stx2839-
dc.rights© Royal Astronomical Society-
dc.subjectTechniques: photometricen_US
dc.subjectTechniques: spectroscopicen_US
dc.subjectSupernovae: generalen_US
dc.subjectSupernovae: individual: SN 2004aben_US
dc.subjectGalaxies: individual: NGC 5054en_US
dc.titleHighly reddened Type Ia supernova SN 2004ab: another case of anomalous extinctionen_US
dc.typeArticleen_US
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