J/A+A/584/A80 Pulsation model data for delta Cep and eta Aql (Merand+, 2015)
Cepheid distances from the SpectroPhoto-Interferometry of Pulsating Stars
(SPIPS). Application to the prototypes δ Cephei and η Aquilae.
Merand A., Kervella P., Breitfelder J., Gallenne A., Coude du Foresto V.,
ten Brummelaar T.A., McAlister H.A., Ridgway S., Sturmann L., Sturmann J.,
Turner N.H.
<Astron. Astrophys. 584, A80 (2015)>
=2015A&A...584A..80M 2015A&A...584A..80M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, distances ; Models
Keywords: techniques: interferometric stars: variables: Cepheids -
stars: distances - circumstellar matter - methods: observational
Abstract:
The parallax of pulsation, and its implementations such as the
Baade-Wesselink method and the infrared surface brightness technique,
is an elegant method to determine distances of pulsating stars in a
quasi-geometrical way. However, these classical implementations in
general only use a subset of the available observational data.
Freedman & Madore (2010ApJ...719..335F 2010ApJ...719..335F) suggested a more physical
approach in the implementation of the parallax of pulsation in order
to treat all available data. We present a global and model-based
parallax-of-pulsation method that enables including any type of
observational data in a consistent model fit, the
SpectroPhoto-Interferometric modeling of Pulsating Stars (SPIPS).
We implemented a simple model consisting of a pulsating sphere with a
varying effective temperature and a combination of atmospheric model
grids to globally fit radial velocities, spectroscopic data, and
interferometric angular diameters. We also parametrized (and adjusted)
the reddening and the contribution of the circumstellar envelopes in
the near-infrared photometric and interferometric measurements.
Description:
FITS files containing the stars' (delta Cep and eta Aql) data and
model presented in the paper. Each fits file has 3 HDU:
1- primary HDU: contains no data apart from the header. The header has
the parameters of the model (keywords 'HIERARCH PARAM') as well as
some other quantities derived from the modeling (keywords 'HIERARCH
MODEL'). These quantities are aimed at people who would like to
reproduce or compare their results with us.
2- 'DATA' HDU: this contains the data used for the fit. Each line is a
scalar measurement described as follow:
col1='MJD' (E) modified Julian date of the observations
col2='OBS' (A50) description of the data point: the string before ";"
defines the type, after ";" is the source. after | are anciliary data:
for diam, UDdiam: [wavelength_um, interfbaselinem]
for mag: photometric band
for color: photometric band1 - photometric band2
col3='MEAS' (E) the actual measurements. units are km/s for Vpuls or Vrad
(which includes the p-factor correction), and mas (milli-arcseconds) for
diameters (diam of UDdiam).
col4='ERR' (E) the uncertainty on the measurement.
col5='MODEL' (E) corresponding value predicted by the model
col6='PHASE' (E) pulsation phase computed from the model ranges from 0 to 1.
col7='PERIOD' (E) pulsation period computed from the model in days
3- 'MODEL' HDU: a tabulation of the pulsation model, as a function of
pulsation phase.
col1='PHASE' (E) phase from 0 to 1.
col2='Vpuls' (E) pulsation velocity, in km/s.
col3='Vrad' (E) radial velocity, in km/s. It is Vpuls/p-factor + Vgamma.
col4='diam' (E) Rosseland angular diameter, in milliarcseconds (mas).
col5='Teff' (E) effective temperature, in Kelvin.
col6='Lum' (E) Luminosity in solar luminosities.
col7='logg' (E) surface gravity, in log_10(cm/s2).
col8,9,10='diamK xxxm' (E) biased angular diameters measured by an
interferometer at baselines xxx (in m), for xxx=[100, 200, 300]. In
milliarcseconds
col≥11= 'MAG ...' or 'COLOR ...' (E) reddenned magnitudes or colors in
various bands, depending on the data entry. '...' is the name of band for
magnitudes, and pair of bands for colors.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
22 29 10.27 +58 24 54.7 delta Cep = HD 213306
19 52 28.37 +01 00 20.4 eta Aql = HD 187929
----------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
etaaql1.dat 103 825 Data used for the fit for eta Aql
delcep1.dat 103 911 Data used for the fit for delta Cep
etaaql2.dat 173 999 Pulsation model data for eta Aql
delcep2.dat 173 999 Pulsation model data for delta Cep
eta_Aql.fits 2880 60 Fits file for eta Aql
delta_Cep.fits 2880 58 Fits file for delta Cep
--------------------------------------------------------------------------------
Byte-by-byte Description of file: etaaql1.dat delcep1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d MJD Modified Julian date of the observation
12- 49 A38 --- Obs Description of the data point (1)
51- 60 F10.6 --- Meas Actual measurements (2)
63- 73 F11.9 --- e_Meas rms uncertainty on the measurement
75- 86 F12.8 --- Model Corresponding value predicted by the model
88- 95 F8.6 --- Phase Pulsation phase computed from the model
97-103 F7.5 d Period Pulsation period computed from the model
--------------------------------------------------------------------------------
Note (1): Description of the data point:
the string before ";" defines the type, after ";" is the source.
after | are anciliary data:
for diam, UDdiam: [wavelength_um, interfbaselinem]
for mag: photometric band
for color: photometric band1 - photometric band2
Note (2): Actual measurement. Units are km/s for Vpuls or Vrad (which includes
the p-factor correction), and mas (milli-arcseconds) for diameters
(diam of UDdiam).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: etaaql2.dat delcep2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.6 --- Phase Phase
10- 19 F10.6 km/s Vpuls Pulsation velocity
21- 30 F10.6 km/s Vrad Radial velocity (Vpuls/p-factor + Vgamma)
32- 38 F7.5 mas diam Rosseland angular diameter
40- 47 F8.3 K Teff Effective temperature
49- 56 F8.3 Lsun Lum Luminosity
58- 64 F7.5 [cm/s2] logg Surface gravity
66- 72 F7.5 mas diamK100m Biased angular diameters measured by an
interferometer at baselines 100m
74- 80 F7.5 mas diamK200m Biased angular diameters measured by an
interferometer at baselines 200m
82- 88 F7.5 mas diamK300m Biased angular diameters measured by an
interferometer at baselines 300m
90- 96 F7.5 mag BTmag Reddenned Tycho B magnitude
(MAG BMVBTYCHO)
98-104 F7.5 mag Hpmag Reddenned Hipparcos B magnitude
(MAG HPMVBHIPPARCOS)
106-112 F7.5 mag VTmag Reddenned Tycho V magnitude
(MAG VMVBTYCHO)
114-120 F7.5 mag Vgcpdmag Reddenned GCPD V magnitude (MAG V_GCPD)
122-129 F8.5 mag VWmag ?=- Reddenned Walraven V magnitude (MAG V_W)
(only for eta Aql)
131-137 F7.5 mag Kctiomag Reddenned CTIO K magnitude (MAG K_CTIO)
139-146 F8.6 mag B-V(W) ?=- Reddenned Walraven B-V colour index
(COLOR BW-VW) (only for eta Aql)
148-155 F8.6 mag B-V(G) Reddenned GCPD B-V colour index
(COLOR BGCPD-VGCPD)
157-164 F8.6 mag J-K Reddenned CTIO J-K colour index
(COLOR JCTIO-KCTIO)
166-173 F8.6 mag H-K Reddenned CTIO H-K colour index
(COLOR HCTIO-KCTIO)
--------------------------------------------------------------------------------
Acknowledgements:
Antoine Merand, amerand(at)eso.org
(End) Patricia Vannier [CDS] 21-Sep-2015