2006A&A...460..769T


Query : 2006A&A...460..769T

2006A&A...460..769T - Astronomy and Astrophysics, volume 460, 769-776 (2006/12-4)

Observations and analysis of two type IIP supernovae: the intrinsically faint object SN 2005cs and the ambiguous object SN 2005ay.

TSVETKOV D.Y., VOLNOVA A.A., SHULGA A.P., KOROTKIY S.A., ELMHAMDI A., DANZIGER I.J. and ERESHKO M.V.

Abstract (from CDS):

To derive observational properties and physical parameters of the progenitor stars of type IIP supernovae SN 2005ay and SN 2005cs from their U,B,V,R,I CCD photometry, and to define their velocity behaviour. Light curves are analysed, and the velocities and spectral characteristics of SN 2005cs are obtained using synthetic spectra modeling. Both supernovae are found to be fainter than the average SN IIP, with SN 2005cs being more subluminous and showing slight brightening in the second half of plateau stage in the V,R,I bands and a low expansion velocity. The effects of two different plausible distance moduli on the derived physical parameters of SN 2005ay are considered. Two approaches are used to recover the amounts of the ejected 56Ni, indicating masses of the order of ∼0.02 M, although late luminosities might indicate a higher amount for SN 2005ay, especially for the large distance case. Constraints on the progenitor properties are also presented, based on empirical analytical models. Two approaches are used to estimate the expansion velocities at the middle of the plateau phase. SN 2005cs represents an example of where all 3 physical parameters, velocity, energy and 56Ni mass are lower than average, a correlation not always observed in SNe IIP. SN 2005ay may belong to the same class if the shorter distance possibility is adopted. Furthermore, the estimated mass range for SN 2005cs is in agreement with limits established by using pre-supernova imaging.

Abstract Copyright:

Journal keyword(s): supernovae: general - supernovae: individual: SN 2005ay - supernovae: individual: SN2005cs

Nomenclature: Fig.1, Table 2: [TVS2006] NGC 3938-N (Nos 1-2). Fig.2, Table 2: [TVS2006] M 51-N (Nos 1-2).

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 674 1
2 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4937 2
3 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
4 SN 1999gi SN* 10 18 16.66 +41 26 28.2   14.8       SNIIP 235 1
5 SN 2005ay SN* 11 52 48.07 +44 06 18.4   15.3       SNIIP 60 1
6 NGC 3938 GiG 11 52 49.4335936248 +44 07 14.697085116 10.80 10.90 10.38     ~ 533 1
7 NGC 3982 Sy1 11 56 28.1445516072 +55 07 30.859586652   12.20 11.70 11.18   ~ 550 1
8 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4329 4
9 SN 2005cs SN* 13 29 53.37 +47 10 28.2   14.5       SNIIP 408 1
10 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2115 0
11 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 798 0
12 NGC 7790 OpC 23 58 27.1 +61 12 36   9.18 8.5     ~ 272 0
13 [RVH96] B * ~ ~   16.339 15.096 14.331 13.680 ~ 2 0
14 [TVS2006] NGC 3938-1 * ~ ~ 14.47 14.40 13.83 13.49 13.17 ~ 1 0
15 [TVS2006] NGC 3938-2 * ~ ~ 16.36 15.86 15.07 14.63 14.25 ~ 1 0
16 [TVS2006] M 51-1 * ~ ~ 14.14 14.005 13.420 13.067 12.730 ~ 2 0

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