2002ApJ...578..144K

Query : 2002ApJ...578..144K

2002ApJ...578..144K - Astrophys. J., 578, 144-150 (2002/October-2)

Large Magellanic Cloud bump cepheids: probing the stellar mass-luminosity relation.

KELLER S.C. and WOOD P.R.

Abstract (from CDS):

We present the results of nonlinear pulsation modeling of 20 bump Cepheids in the LMC. By obtaining an optimal fit to the observed V,R MACHO light curves, we have placed tight constraints on stellar parameters of M, L, and Teff as well as quantities of distance modulus and reddening. We describe the mass-luminosity relation for core He burning for intermediate-mass stars. The mass-luminosity relation depends critically on the level of mixing within the stellar interior over the course of the main-sequence lifetime. Our sample is significantly more luminous than predicted by classical stellar evolutionary models that do not incorporate extension to the convective core. Under the paradigm of convective core overshoot, our data imply Λcof 0.65±0.03l/Hp. We derive a LMC distance modulus of 18.55±0.02.

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Journal keyword(s): Stars: Variables: Cepheids - Cosmology: Distance Scale - Galaxies: Magellanic Clouds - Stars: Evolution - Stars: Oscillations

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
2 SV* HV 5513 cC* 04 57 50.1463096464 -68 59 22.567332300     14.890   14.093 ~ 16 0
3 SV* HV 2277 cC* 05 01 51.9530155152 -69 23 22.220295252   15.06 14.480 14.03 13.695 ~ 28 0
4 SV* HV 2280 cC* 05 02 51.5613694680 -68 47 05.190635112   15.52 14.698 14.23 13.757 ~ 30 0
5 SV* HV 2296 cC* 05 03 57.2785115976 -68 50 24.131781132   15.40 14.761 14.22 13.827 ~ 27 0
6 SV* HV 2307 cC* 05 05 08.9199004992 -69 15 12.203243748     14.824   14.073 ~ 22 0
7 SV* HV 2309 cC* 05 05 41.9753378280 -68 51 05.193082944   15.68 15.125 14.55 14.216 ~ 25 0
8 SV* HV 896 cC* 05 06 39.8884924200 -68 25 12.642337920   15.37 14.704 14.29 13.915 ~ 25 0
9 SV* HV 2339 cC* 05 08 49.5351793512 -68 59 59.038673568   15.06 14.299 13.89 13.406 ~ 33 0
10 SV* HV 2352 cC* 05 09 04.3684805616 -70 21 54.126143748   14.86 14.197 13.74 13.38 ~ 47 0
11 SV* HV 905 cC* 05 09 15.9284230344 -68 44 29.529329028   15.06 14.520 13.99 13.592 ~ 42 0
12 SV* HV 2337 cC* 05 09 36.9600213408 -68 02 43.661029272     15.050   14.291 ~ 31 0
13 SV* HV 908 cC* 05 09 56.3310707184 -68 59 40.535268360   15.09 14.600 14.15 13.911 ~ 24 0
14 SV* HV 913 cC* 05 11 53.2789474104 -69 06 48.546536832   15.11 14.605 14.15 13.873 ~ 25 0
15 SV* HV 2367 cC* 05 12 18.7904882592 -68 52 45.029480772     14.646   13.912 ~ 23 0
16 SV* HV 2386 cC* 05 13 10.0896063480 -70 26 45.045981096     15.154   14.350 ~ 18 0
17 SV* HV 919 cC* 05 15 04.6026191184 -70 07 10.018253028     14.903   14.162 ~ 17 0
18 SV* HV 937 cC* 05 20 22.9671347376 -70 02 33.041757804     15.151   14.419 ~ 22 0
19 SV* HV 939 cC* 05 20 55.9784950200 -69 48 20.435829012     14.958   14.291 ~ 23 0
20 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
21 SV* HV 2497 cC* 05 24 33.2907697800 -69 36 40.175809920     14.649   13.974 ~ 21 0
22 SV* HV 974 cC* 05 27 54.9953817744 -69 48 03.864235932   15.38 14.784 14.36 14.129 ~ 21 0

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