Reclassification of Cepheids in the Gaia Data Release 2 - Period-luminosity and period-Wesenheit relations in the Gaia passbands

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Volume 625 (May 2019)

A&A, 625 (2019) A14

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Table 3.

Results of the least-squares fit in the form of Eq. (7) or Eq. (11) for the full MW DCEPs and T2CEPs sample (top part of the table) and for the selected sample of MW DCEPs with a full characterisation in terms of reddening and metallicity estimates (bottom half part of the table).

α	β	γ	σ_ABL	n	Method	Type
(1)	(2)	(3)	(4)	(5)	(6)	(7)
Full MW DCEPs and T2CEPs sample

−2.701 ± 0.086	−3.320 ± 0.107		0.013	489	PW_A	DCEP_F
−2.976 ± 0.131	−4.095 ± 0.304		0.020	138	PW_A	DCEP_1O
−1.194 ± 0.061	−2.381 ± 0.080		0.071	269	PW_A	T2CEP

−2.699 ± 0.023	−3.327 fixed		0.013	489	PW_A	DCEP_F
−3.246 ± 0.045	−3.471 fixed		0.020	138	PW_A	DCEP_1O
−1.211 ± 0.043	−2.356 fixed		0.071	269	PW_A	T2CEP

Selected MW DCEPs sample

−2.837 ± 0.081	−3.183 ± 0.097		0.011	292	PW_A	DCEP_F
−3.214 ± 0.223	−3.587 ± 0.507		0.012	33	PW_A	DCEP_1O
−1.942 ± 0.096	−2.454 ± 0.116		0.025	273		DCEP_F
−1.903 ± 0.302	−3.709 ± 0.712		0.026	33		DCEP_1O
−1.816 ± 0.102	−2.229 ± 0.121		0.031	273		DCEP_F
−2.100 ± 0.178	−2.776 ± 0.375		0.022	33		DCEP_1O
−2.313 ± 0.094	−2.607 ± 0.113		0.019	273		DCEP_F
−2.637 ± 0.178	−3.110 ± 0.383		0.016	33		DCEP_1O

−2.721 ± 0.025	−3.327 fixed		0.011	292	PW_A	DCEP_F
−3.261 ± 0.056	−3.471 fixed		0.012	33	PW_A	DCEP_1O
−1.688 ± 0.032	−2.765 fixed		0.025	273		DCEP_F
−2.175 ± 0.072	−3.159 fixed		0.028	33		DCEP_1O
−1.525 ± 0.033	−2.580 fixed		0.031	273		DCEP_F
−1.855 ± 0.040	−3.308 fixed		0.023	33		DCEP_1O
−2.083 ± 0.030	−2.892 fixed		0.019	273		DCEP_F
−2.593 ± 0.042	−3.204 fixed		0.016	33		DCEP_1O

−2.862 ± 0.082	−3.134 ± 0.095	−0.237 ± 0.199	0.011	261	PW_AZ	DCEP_F

−2.716 ± 0.028	−3.327 fixed	−0.105 ± 0.207	0.011	261	PW_AZ	DCEP_F

Notes. The different columns show the: (1–3) coefficients of the nonlinear fit and the relative errors; (4) rms of the residuals of the ABL function; (5) number of objects used in the fit; (6) method (PL or PW); (7) type of the pulsators. To remark on the differences with Table 1, we added an underscript “A” or a superscript 0 to show that the magnitudes adopted are absolute and/or de-reddened, respectively. “Fixed” means that the slope of LMC (β) was imposed to derive the other parameters; PW_AZ indicates a PW relation depending on metallicity.

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