J/A+A/550/A70 Galactic and Magellanic Cloud Cepheids distance (Groenewegen 2013)
Baade-Wesselink distances to Galactic and Magellanic Cloud Cepheids and
the effect of metallicity.
Groenewegen M.A.T.
<Astron. Astrophys., 550, A70 (2013)>
=2013A&A...550A..70G 2013A&A...550A..70G
ADC_Keywords: Milky Way ; Magellanic Clouds ; Stars, variable ; Stars, distances
Keywords: stars: distances - stars: variables: Cepheids
Abstract:
The metallicity dependence of the Cepheid period-luminosity (PL)
relation is of importance in establishing the extragalactic distance
scale.
The aim of this paper is to investigate the metallicity dependence of
the PL relation in V and K, based on a sample of 128 Galactic, 36
Large Magellanic Cloud (LMC), and 6 Small Magellanic Cloud (SMC)
Cepheids with individual Baade-Wesselink (BW) distances (some of the
stars also have an Hubble Space Telescope (HST) based and Hipparcos
parallax or are in clusters) and individually determined metallicities
from high-resolution spectroscopy.
Literature values of the V-band, K-band, and radial velocity data were
collected for the sample of Cepheids. Based on a (V-K)
surface-brightness relation and a projection factor, distances were
derived from a BW analysis.
Since 2008, additional radial velocity data has been obtained using
the 1.2m Euler telescope located at the La Silla observatory (see
Groenewegen 2008A&A...488...25G 2008A&A...488...25G for a description of the data taking
and data reduction). The new Radial Velocity (RV) data are presented
in Table 3.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table10.dat 109 170 *Distances, radii, and absolute magnitudes from
the Baade-Wesselink (BW) analysis
table3.dat 29 170 *New radial velocity data
table45.dat 25 143 Published [Fe/H] values for Cepheids
tablea1.dat 40 23 Distances to cluster containing Cepheids
notes.dat 80 61 Notes to tablea1
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Note on table10.dat, table5.dat: X Sct was observed for radial velocities
(table3.dat), but has too poor near-IR data for BW analysis, and is
therefore absent from table10.dat
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1 A1 --- Loc [GLS] Localisation: Galaxy / LMC / SMC
3- 11 A9 --- Name Cepheid name
13- 17 F5.3 mag E(B-V) Colour excess
19- 23 F5.3 mag e_E(B-V) rms uncertainty on E(B-V)
25- 33 F9.6 d Per Period
35- 39 F5.3 --- p p-factor relation (p=1.50-0.24logPer)
41- 47 F7.1 pc Dist Cepheid distance
49- 54 F6.1 pc e_Dist Error in the fit on Dist
56- 61 F6.1 pc e.D Error based on Monte-Carlo simulation on Dist
63- 67 F5.1 Rsun Rad Cepehid radius
69- 72 F4.1 Rsun e_Rad Error in the fit on Rad
74- 77 F4.1 Rsun e.R Error based on Monte-Carlo simulation on Rad
79- 83 F5.2 mag VMAG Absolute V magnitude
85- 88 F4.2 mag e_VMAG Error due to the errors of Dist and E(B-V)
on VMAG
90- 93 F4.2 mag e.V Error based on Monte-Carlo simulation on VMAG
95- 99 F5.2 mag KMAG Absolute K magnitude
101-104 F4.2 mag e_KMAG Error due to the errors of Dist and E(B-V)
on KMAG
106-109 F4.2 mag e.K Error based on Monte-Carlo simulation on KMAG
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cepheid name
11- 22 F12.4 d JD Julian date
24- 29 F6.2 km/s RV Radial velocity
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Byte-by-byte Description of file: table45.dat
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Bytes Format Units Label Explanations
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1 A1 --- Loc [GLS] Localisation: Galaxy / LMC / SMC
3- 11 A9 --- Name Cepheid name
14- 18 F5.2 [Sun] [Fe/H] Metallicity
20- 23 F4.2 [Sun] e_[Fe/H] ? rms uncertainty on [Fe/H]
25 I1 --- r_[Fe/H] Reference for [Fe/H] (1)
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Note (1): References as follows:
1 = Luck & Lambert (2011, Cat. J/AJ/142/136)
2 = Luck et al. (2011, Cat. J/AJ/142/51)
3 = Romaniello et al. (2008A&A...488..731R 2008A&A...488..731R)
4 = Fry & Carney (1997, Cat. J/AJ/113/1073)
5 = Andrievsky et al. (2003AN....324..532A 2003AN....324..532A)
6 = Molinaro et al. (2012ApJ...748...69M 2012ApJ...748...69M)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cepheid name
11- 23 A13 --- Cluster Cluster name
26- 30 F5.2 mag DM Adopted distance modulus for the cluster
32- 35 F4.2 mag e_DM rms uncertainty on DM
36 A1 --- n_DM [*] *: No error quoted, conservative error
adopted
38- 40 A3 --- Met [BV JHK] Method of ZAMS fitting: with
(B,V) or (J,H,K) colors.
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Cepheid name
11- 80 A70 --- Note Text of the note
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Apr-2013