Surface brightness–colour relations of Milky Way and Magellanic Clouds classical Cepheids based on Gaia magnitudes

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Volume 706 (February 2026)

A&A, 706 (2026) A336

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Table 2

Distances in parsec of seven Cepheids from the literature.

RS Pup	1756 ± 53	(1)
	${1704.42}_{59.19}^{50.84}$ $\[1704.42_{59.19}^{50.84}\]$	(13)
	1695 ± 62	(2)
	1910 ± 80	(3)
	1641 ± 148	(7)

ℓ Car	503 ± 27	(1)
	${514.97}_{547.91}^{28.99}$ $\[514.97_{547.91}^{28.99}\]$	(13)
	533 ± 25	(2)
	$463_{83}^{123}$ $\[463_{83}^{123}\]$	(4)
	$603_{19}^{24}$ $\[603_{19}^{24}\]$	(5)
	$566_{19}^{24}$ $\[566_{19}^{24}\]$	(6)

ζ Gem	325 ± 23	(1)
	374 ± 13	(2)
	370 ± 33	(7)
	$358_{80}^{146}$ $\[358_{80}^{146}\]$	(4)
	$422_{47}^{61}$ $\[422_{47}^{61}\]$	(8)
	$369_{21}^{24}$ $\[369_{21}^{24}\]$	(9)
	$360_{22}^{25}$ $\[360_{22}^{25}\]$	(10)
	362 ± 38	(11)

β Dor	341 ± 16	(1)
	349 ± 15	(2)
	316 ± 28	(7)
	$345_{80}^{175}$ $\[345_{80}^{175}\]$	(5)
	$318_{50}^{74}$ $\[318_{50}^{74}\]$	(4)

η Aql	272 ± 14	(1)
	${272.17}_{14.38}^{11.31}$ $\[272.17_{14.38}^{11.31}\]$	(13)
	272 ± 11	(2)
	256 ± 23	(7)
	$360_{89}^{175}$ $\[360_{89}^{175}\]$	(4)
	$276_{33}^{55}$ $\[276_{33}^{55}\]$	(5)
	320 ± 32	(11)

X Sgr	356 ± 17	(1)
	${354.35}_{20.95}^{15.80}$ $\[354.35_{20.95}^{15.80}\]$	(13)
	350 ± 13	(2)
	$330_{78}^{148}$ $\[330_{78}^{148}\]$	(4)

δ Cep	281 ± 11	(1)
	${281.19}_{10.35}^{9.72}$ $\[281.19_{10.35}^{9.72}\]$	(13)
	266 ± 12	(2)
	244 ± 22	(7)
	$301_{45}^{64}$ $\[301_{45}^{64}\]$	(4)
	$273_{11}^{12}$ $\[273_{11}^{12}\]$	(12)

Notes. (1) Gaia Collaboration (2020); (2) Skowron et al. (2019); (3) Kervella et al. (2014); (4) Perryman et al. (1997); (5) Kervella et al. (2004c); (6) Kervella et al. (2004b); (7) Luck et al. (2011), (8) van Leeuwen (2007); (9) van Leeuwen et al. (2007); (10) Benedict et al. (2007); (11) Lane et al. (2002); (12) Benedict et al. (2002), (13) Bailer-Jones (2023). Following Luck et al. (2011), we took uncertainties of 9% for their distance measurements. The distances are indicated in parsec. As no zero-point correction is available for all the seven stars, we decided to not use the Gaia parallax (distances in italics), but the geometric Bailer-Jones (2023) distances when available.

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