Synthetic spectra from SYNTHE

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Grids

[Fe/H]	v_turb	Colour
		blue	red	CaT
		380 - 500 nm	637 - 677 nm	840 - 880 nm
+0.0	2 km/s	p00.vt2.blue	p00.vt2.red	p00.vt2.CaT
+0.0	5 km/s	p00.vt5.blue	p00.vt5.red	p00.vt5.CaT
-0.3	2 km/s	m03.vt2.blue	m03.vt2.red	m03.vt2.CaT
-0.3	5 km/s	m03.vt5.blue	m03.vt5.red	m03.vt5.CaT
-0.5	2 km/s	m05.vt2.blue	m05.vt2.red	m05.vt2.CaT
-0.5	5 km/s	m05.vt5.blue	m05.vt5.red	m05.vt5.CaT

The current extent of the grids is: Teff = 3500 (500) 8500 and log g = 2.0 (0.5) 4.5, and spectra are computed at a resolution of 90000.

Description

A limited grid of synthetic spectra computed using John Lester's version of Kurucz' codes MOLDECK, SYNTHE and SPECSYN. The grid is located at: http://star.arm.ac.uk/~csj/synthe_models/, where you may find folders in the form

mMM.vtV.WAV/


mMM: p00 corresponds to [Fe/H] =  0.0 
     m03             to [Fe/H] = -0.3, etc... 

vtV: vt2 represents v_turb = 2 km/s 

WAV: blue : 380 - 500 nm
     red  : 637 - 677 nm
     CaT  : 840 - 880 nm
  

Within each folder are files with names of the form....

mMMTTGG.vtV.WAV  and/or mMMTTGG.WAV  

TT:  Teff / 100K
GG:  log g * 10

(If both files exist they should be equivalent). Thus the blue spectrum for a solar composition model with Teff=5500, log g=4.0, v_turb = 2 km/s would be found at .... http://star.arm.ac.uk/~csj/synthe_models/p00.vt2.blue/p005545.vt2.blue. The contents of each file is as follows:

#  sdsc grid  [+0.0]   vturb 2.0 km/s    l/h 1.25                           
# teff =  5500.
# log g = 4.5000
# lambda/delta lambda =  90000.
# number of data points =   24701
#
#      lambda(nm)     physical flux     continuum flux     residual flux
#
       380.00000       2.29043E-05       4.38229E-05          0.52266
       380.00422       2.48818E-05       4.38239E-05          0.56777
...
       499.99748       6.86839E-05       6.90442E-05          0.99478
       500.00304       6.87264E-05       6.90451E-05          0.99538

References

The model atmospheres on which these spectra were based were taken from Kurucz' standard grid of ATLAS models:

Kurucz, R.L., 1991, in Stellar Atmopsheres: Beyond Classical Models, ed., L.Crivellari, I.Hubeny, & D.G.Hummer, NATO ASI Ser., vol. C341 (Kluwer, Dordrecht), 441.

The formal solution program SYNTHE with which they were computed was presented on:

Kurucz, R.L., 1993, SAO KURUCZ CD-ROM, No 18

Its implementation on Unix systems has been described by:

Jeffery, C.S., Lester, J., & Short, I. 1996, CCP7 Newslett., No. 24, 13

The models presented here were computed originally for the analysis of the cool component of the remarkable binary BI Lyn, which comprises an early B-type hydrogen-deficient giant and a rapidliy rotating G giant. The work is described by

Jeffery, C.S., & Aznar Cuadrado, R. 2001, A&A 378, 936

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