J/A+A/681/A65 Cepheids PL relation metallicity dependence (Trentin+, 2024)
Cepheid Metallicity in the Leavitt Law (C-MetaLL) survey:
IV. The metallicity dependence of Cepheid period-luminosity relations.
Trentin E., Ripepi V., Molinaro R., Catanzaro G., Storm J., De Somma G.,
Marconi M., Bhardwaj A., Gatto M., Testa V., Musella I., Clementini G.,
Leccia S.
<Astron. Astrophys. 681, A65 (2024)>
=2024A&A...681A..65T 2024A&A...681A..65T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry ; Optical ; Abundances
Keywords: stars: variables: Cepheids - stars: distances - distance scale -
stars: abundances - stars: fundamental parameters
Abstract:
Classical Cepheids (DCEPs) play a fundamental role in the calibration
of the extragalactic distance ladder, which eventually leads to the
determination of the Hubble constant(H0) thanks to the
period-luminosity (PL) and period-Wesenheit (PW) relations
exhibited by these pulsating variables. Therefore, it is of great
importance to establish the dependence of PL and PW relations on
metallicity.
We aim to quantify the metallicity dependence of the PL and PW
relations of the Galactic DCEPs for a variety of photometric bands,
ranging from optical to near-infrared.
We gatheres a literature sample of 910 DCEPs with available [Fe/H]
values from high-resolution spectroscopy or metallicities from the
Gaia Radial Velocity Spectrometer (RVS). For all these stars, we
collected photometry in the GBP, GRP, G, I, V, J, H, and KS
bands and astrometry from Gaia Data Release 3 (DR3). We used these
data to investigate the metal dependence of both the intercepts and
slopes of a variety of PL and PW relations at multiple wavelengths.
We find a large negative metallicity effect on the intercept (γ
coefficient) of all the PL and PW relations investigated in this work,
while present data still do not allow us to draw firm conclusions
regarding the metal dependence of the slope (δ coefficient). The
typical values of γ are around -0.4:-0.5mag/dex, which is
larger than most of the recent determinations present in the
literature. We carried out several tests, which confirm the robustness
of our results. As in our previous works, we find that the inclusion
of a global zero point offset of Gaia parallaxes provides smaller
values of γ (in an absolute sense). However, the assumption of
the geometric distance of the Large Magellanic Cloud (LMC) seems to
indicate that larger values of γ (in an absolute sense) would be
preferred.
Description:
Photometric, astrometric, and spectroscopic data for the DCEP sample
used in this work.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 507 910 Photometric, astrometric, and spectroscopic data
for the DCEP sample used in this work
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See also:
J/MNRAS/508/4047 : 47 classical Cepheids HARPSN@TNG spectroscopy (Ripepi+ 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- GaiaDR3 GaiaDR3 id
21- 47 A27 --- Name Name
49- 68 F20.16 deg RAdeg Right ascension (J2000)
70- 91 F22.18 deg DEdeg Declination (J2000)
93-101 A9 --- Mode Mode of pulsation
103-123 F21.18 mas plx Original parallax value
125-144 F20.18 mas e_plx Error of the parallax value
146-167 E22.16 mas plxcorr Parallax correction according to
Lindegren et al., 2021A&A...649A...4L 2021A&A...649A...4L
169-174 F6.3 --- RUWE RUWE value from Gaia DR3
176-186 E11.9 --- fv2 Fidelity_v2 index from Rybizki et al.,
2022MNRAS.510.2597R 2022MNRAS.510.2597R
188-207 F20.17 d Period Period of pulsation
209-228 F20.18 mag E(B-V) Colour excess E(B-V)
230-249 F20.18 mag e_E(B-V) Error of E(B-V)
251-260 F10.7 mag Gmag G magnitude
262-271 F10.7 mag e_Gmag Error of G magnitude
273-282 F10.7 mag BPmag Gbp magnitude
284-293 F10.7 mag e_BPmag Error of Gbp magnitude
295-304 F10.7 mag RPmag Grp magnitude
306-315 F10.7 mag e_RPmag Error of Grp magnitude
317-326 F10.7 mag Vmag V magnitude
328-337 F10.7 mag e_Vmag Error of V magnitude
339-348 F10.7 mag Imag I magnitude
350-359 F10.7 mag e_Imag Error of I magnitude
361-370 F10.7 mag Jmag J magnitude
372-381 F10.7 mag e_Jmag Error of J magnitude
383-392 F10.7 mag Hmag H magnitude
394-403 F10.7 mag e_Hmag ?=- Error of H magnitude
405-414 F10.7 mag Kmag K magnitude
416-425 F10.7 mag e_Kmag ?=- Error of K magnitude
427-448 E22.16 [-] [Fe/H] Iron abundance
450-469 F20.18 [-] e_[Fe/H] Error of [Fe/H]
471-478 A8 --- r_[Fe/H] Literature source of the iron abundance (1)
480-483 A4 --- r_E(B-V) Source for the values of E(B-V) (1)
485-494 A10 --- r_Vmag Source for the V magnitude
496-505 A10 --- r_Imag Source for the I magnitude
507 I1 --- f_[Fe/H] [0/2] Flag for the provenance of [Fe/H] (2)
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Note (1): References as follows:
G14 = Genovali et al. (2014A&A...566A..37G 2014A&A...566A..37G, Cat. J/A+A/566/A37)
G18 = Groenewegen (2018A&A...619A...8G 2018A&A...619A...8G, Cat. J/A+A/619/A8)
GALAH = Buder et al. (2021MNRAS.506..150B 2021MNRAS.506..150B, Cat. J/MNRAS/506/150)
GC17 = Gaia Collaboration et al. (2017A&A...605A..79G 2017A&A...605A..79G,
Cat. J/A+A/605/A79)
Gaia_CU8 = Gaia DR3 (Cat. I/355) CUS
Gaia_Synth = Gaia DR3 (Cat. I/355) Synyh
K21 = Kovtyukh et al. (2022MNRAS.510.1894K 2022MNRAS.510.1894K)
Lit = compilation from the literature (mainly from G18)
PASTEL = Soubiran et al. (2016A&A...591A.118S 2016A&A...591A.118S, Cat. B/pastel)
Pancino22 = magnitudes calculated on the basis of the Gaia bands using the
transformations to the Johnson-Cousins system by Pancino et
al. (2022A&A...664A.109P 2022A&A...664A.109P, Cat. J/A+A/664/A109)
R21 = the value of reddening was calculated using the period-colour
relations published in Ripepi et al.
(2021MNRAS.508.4047R 2021MNRAS.508.4047R, Cat. J/MNRAS/508/4047)
T22 = Trentin et al. (2023MNRAS.519.2331T 2023MNRAS.519.2331T)
VL07 = van Leeuwen et al. (2007MNRAS.379..723V 2007MNRAS.379..723V)
Note (2): Flag as follows:
0 = HiRes spectroscopy
1 = Gaia RVS spectroscopy published in DR3 with good quality according to
the selections by Recio-Blanco et al. (2023A&A...674A..29R 2023A&A...674A..29R, Cat. I/355)
2 = Gaia RVS spectroscopy published in DR3 with intermediate-quality
according to the selections by Recio-Blanco et al.
(2023A&A...674A..29R 2023A&A...674A..29R, Cat. I/355)
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Acknowledgements:
Erasmo Trentin, etrentin(at)aip.de, erasmo.trentin(at)inaf.it
References:
Ripepi et al., Paper I 2021MNRAS.508.4047R 2021MNRAS.508.4047R, Cat. J/MNRAS/508/4047
Trentin et al., Paper II 2023MNRAS.519.2331T 2023MNRAS.519.2331T
Molinaro et al., Paper III 2023MNRAS.520.4154M 2023MNRAS.520.4154M
(End) Patricia Vannier [CDS] 01-Dec-2023