Spectral Energy Distribution for Galactic O stars



This page provides new Spectral Energy Distributions for Galactic O stars computed with the code CMFGEN (Hillier & Miller 1998). A grid of non-LTE models including winds and line-blanketing was constructed and used to produce new calibration of stellar properties of Galactic O stars: the results were presented in Martins, Schaerer & Hillier, 2005, A&A, 436, 1049 ( ADS reference).

The following figure shows how our grid of models samples the HR diagram.

Our models in the HR diagram.

Here we make the SEDs of these models available. The following table gives the main parameters of the models together with a link to the complete SED. The SED files give the wavelength (Å) in the first column and F_λ (in erg/s/cm²/Å) in the second one. Their typical size is 10Mb. The SEDs cover the wavelength range 50 Å - 70 μm. The number of frequency points ranges between 294000 and 547000 depending on the ionisation states (and thus on the number of lines) included in the models (different ionisation states being included for different Teff). The spacing of the frequency grid is variable since the grid is designed to resolve all line profiles and since the density of lines depends on the wavelength range.

The complete set of SEDs can also be retrieved here (114 Mb, tar.gz file).

Teff [K]	log g	log L/Lsol	log Mdot [Msol/yr]	v∞ [km/s]	SED file
27500	3.00	5.50	-6.02	1530	T27p5_logg3p00.sed
27500	3.25	5.33	-6.50	1850	T27p5_logg3p25.sed
27500	3.50	4.95	-7.16	1980	T27p5_logg3p50.sed
27500	3.75	4.55	-7.84	2100	T27p5_logg3p75.sed
27730	3.35	5.17	-6.07	1868	T27p7_logg3p35.sed
30000	3.00	5.50	-5.67	1400	T30p0_logg3p00.sed
30000	3.13	5.85	-5.52	1983	T30p0_logg3p13.sed
30000	3.50	5.20	-6.59	2100	T30p0_logg3p50.sed
30000	4.00	4.50	-7.86	2500	T30p0_logg4p00.sed
30000	4.10	4.35	-8.13	2570	T30p0_logg4p10.sed
30000	4.20	4.25	-8.34	2720	T30p0_logg4p20.sed
30270	3.29	5.58	-5.41	1893	T30p3_logg3p29.sed
30410	3.73	4.87	-6.63	2202	T30p4_logg3p73.sed
31480	4.06	4.55	-7.20	2500	T31p5_logg4p06.sed
32210	3.26	5.87	-4.93	1960	T32p2_logg3p26.sed
32500	3.25	5.90	-5.35	2175	T32p5_logg3p25.sed
32500	3.50	5.40	-6.12	2175	T32p5_logg3p50.sed
32500	3.60	5.25	-6.38	2240	T32p5_logg3p60.sed
32500	4.10	4.60	-7.61	2740	T32p5_logg4p10.sed
32500	4.25	4.45	-7.94	2985	T32p5_logg4p25.sed
32660	3.71	5.10	-6.31	2208	T32p7_logg3p71.sed
33340	4.01	4.77	-6.86	2544	T33p3_logg4p01.sed
35000	3.25	6.10	-4.92	2266	T35p0_logg3p25.sed
35000	3.50	5.70	-5.60	2400	T35p0_logg3p50.sed
35000	4.10	4.80	-6.96	2850	T35p0_logg4p10.sed
35000	4.25	4.60	-7.56	3020	T35p0_logg4p25.sed
36310	4.02	5.00	-6.60	2589	T36p3_logg4p02.sed
37500	3.50	6.10	-5.03	2825	T37p5_logg3p90.sed
37500	3.90	5.30	-6.26	2820	T37p5_logg3p90.sed
37760	3.76	5.52	-5.81	2354	T37p8_logg3p76.sed
39540	3.68	5.84	-5.25	2381	T39p5_logg3p68.sed
40000	3.50	6.10	-4.85	2644	T40p0_logg3p50.sed
40000	3.90	5.53	-5.88	3020	T40p0_logg3p90.sed
41780	4.02	5.45	-6.17	2690	T41p8_logg4p02.sed
42560	3.71	6.07	-4.88	2538	T42p6_logg3p71.sed
46130	4.05	5.77	-5.86	2883	T46p1_logg4p05.sed
48530	4.01	6.03	-5.38	2977	T48p5_logg4p01.sed