M31N 2007-11d: A Slowly-Rising, Luminous Nova in M31

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dc.creatorShafter, A. W.
dc.creatorRau, A.
dc.creatorQuimby, R. M.
dc.creatorKasliwal, M. M.
dc.creatorBode, M. F.
dc.creatorDarnley, M. J.
dc.creatorMisselt, K. A.
dc.date2008-09-08
dc.date.accessioned2026-07-07T12:15:35Z
dc.date.available2026-07-07T12:15:35Z
dc.descriptionWe report a series of extensive photometric and spectroscopic observations of the luminous M31 nova M31N 2007-11d. Our photometric observations coupled with previous measurements show that the nova took at least four days to reach peak brightness at R~14.9 on 20 Nov 2007 UT. After reaching maximum, the time for the nova to decline 2 and 3 magnitudes from maximum light (t_2 and t_3) was ~9.5 and ~13 days, respectively, establishing that M31N 2007-11d was a moderately fast declining nova. During the nova's evolution a total of three spectra were obtained. The first spectrum was obtained one day after maximum light (5 days post-discovery), followed by two additional spectra taken on the decline at two and three weeks post-maximum. The initial spectrum reveals narrow Balmer and Fe II emission with P Cygni profiles superimposed on a blue continuum. These data along with the spectra obtained on the subsequent decline clearly establish that M31N 2007-11d belongs to the Fe II spectroscopic class. The properties of M31N 2007-11d are discussed within the context of other luminous novae in M31, the Galaxy, and the LMC. Overall, M31N 2007-11d appears to be remarkably similar to Nova LMC 1991, which was another bright, slowly-rising, Fe II nova. A comparison of the available data for luminous extragalactic novae suggest that the >~4 day rise to maximum light seen in M31N 2007-11d may not be unusual, and that the rise times of luminous Galactic novae, usually assumed to be <~2 days, may have been underestimated.
dc.descriptionAccepted for publication in The Astrophysical Journal (28 pages, 6 figures)
dc.identifierhttps://arxiv.org/abs/0809.1388
dc.identifierhttp://arxiv.org/abs/0809.1388
dc.identifierAstrophys.J.690:1148-1157,2009
dc.identifierdoi:10.1088/0004-637X/690/2/1148
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211531
dc.subjectAstrophysics
dc.titleM31N 2007-11d: A Slowly-Rising, Luminous Nova in M31
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