Table 4: Radii derived with the current CORS method compared with previous determinations (see text).
Cepheid Binary Period $R_{{\rm without} \Delta B}$ $R_{\Delta B}$ $R_{\rm AFR}$ $R_{\rm LS}/R_{\rm GFG}$ $R_{\rm RBMR.}$ $R_{\rm BM}$

days $\frac{R}{R_{\odot}}$ $\frac{R}{R_{\odot}}$ $\frac{R}{R_{\odot}}$ $\frac{R}{R_{\odot}}$ $\frac{R}{R_{\odot}}$ $\frac{R}{R_{\odot}}$

FF Aql^* O 4.470840 49.8 54.1 52.0 - - -

FM Aql - 6.114334 56.5 59.3 59.3 - 60.6 51.61

FN Aql - 9.481614 83.5 86.5 - - - -

$\eta$ Aql B 7.176779 48.2 52.6 67.5 - 56.7 52.76

TT Aql - 13.75551 84.3 - 76.1 - 95.3 94.31

U Aql O 7.024100 45.4 47.0 48.9 - 61.3 52.45

V496 Aql B 6.807164 47.7 61.2 38.1 - 36.4 43.69

V600 Aql - 7.238748 55.4 8 0.1 56.3 - - -

RX Aur B: 11.623537 83.7 81.0 - - - 61.17

RT Aur - 3.728561 27.9 30.6 36.2 - 42.2 35.74

$\delta$ Cep V 5.366316 41.0 47.2 46.2 - 52.8 39.84

DT Cyg^* - 2.499086 46.4 38.7 32.3 - 42.9 -

SU Cyg O 3.845733 35.4 40.8 48.9 - 61.3 52.45

X Cyg - 16.386130 104.1 - 69.3 - 96.2 114.29

VZ Cyg O 4.864504 45.3 53.1 35.8 - 47.3 35.57

BG Cru^* - 3.342503 28.9 32.7 - - - -

$\zeta$ Gem V 10.150780 64.4 75.0 55.1 - 86.2 62.55

W Gem - 7.913960 96.9 86.4 48.5 - 60.7 48.69

BG Lac b 5.331938 47.0 48.9 - - 35.8 43.49

X Lac b 5.444990 41.3 46.9 36.7 - 71.2 61.97

Z Lac O 10.88554 67.2 69.4 83.1 - 86.8 66.40

BF Oph b 4.067695 39.9 44.8 - 36.11^a/ 35.8^b 32.4 33.78

Y Oph b 17.126780 96.3 93.4 - 93.22^a 112.2 -

AW Per O 6.463589 29.7 37.5 34.7 - 54.8 45.40

V440 Per^* B: 7.572712 62.9 76.8 - - - -

CM Sct - 3.916977 38.4 38.6 29.6 - - -

EV Sct B: 3.090998 30.9 42.0 - 47.62^a/ 32.5^b 36.6 -

SS Sct - 3.671280 39.6 44.2 30.4 - - 27.71

RU Sct - 19.70062 102.9 - - 120.45^a - -

Y Sct b 10.341650 60.9 - - - 71.5 80.45

AP Sgr B: 5.0574269 60.4 62.3 36.6 - 50.0 -

S Sge O 8.382044 75.1 79.1 64.6 - - -

BB Sgr - 6.637115 47.6 61.3 - 37.39^a /44.4^b 53.5 40.42

U Sgr - 6.745363 76.6 82.5 - 52.30^a/ 48.8^b - 57.61

V350 Sgr O 5.154557 32.1 32.7 40.2 - 46.0 49.55

X Sgr - 7.012630 52.5 59.8 68.5 - 58.6 47.76

Y Sgr B 5.773400 47.4 56.2 - - 61.4 47.95

YZ Sgr - 9.553606 93.6 95.8 - - 136.0 -

W Sgr O 7.595080 58.6 62.6 62.5 - 58.6 60.77

WZ Sgr B 21.849708 120.5 - - 121.43^a /122.2^b - 151.20

SV Vul B 44.999660 213.0 - 135.6 241.62^a/ 250.7^b - 189.5

T Vul b 4.435532 31.8 37.1 42.3 - 48.8 36.54

U Vul O 7.990736 75.0 84.4 57.9 - 61.1 54.34

An asterisk at top-right of Cepheid name means that it pulsates as a First Overtone.
In the second column: B - spectroscopic binary, B: - spectroscopic binary but confirmation needed; b - Photometric companion, physical relation should be investigated; O - spectroscopic binary with known orbit; V visual binary (see Szabados 2003 for details).
Radius sources: $R_{\rm AFR}$ Arellano Ferro & Rosenzweing (2000); $R_{\rm LS}$ Laney & Stobie (1995) / $R_{\rm GFG}$ Gieren et al. (1998): in the table ^a refer to $R_{\rm LS}$ and ^b to $R_{\rm GFG}$ ; $R_{\rm RBMR}$ Ripepi et al. (1997); $R_{\rm BM}$ Barnes & Moffet (1987).

**Table 4:** Radii derived with the current CORS method compared with previous determinations (see text).
Cepheid	Binary	Period	$R_{{\rm without} \Delta B}$	$R_{\Delta B}$	$R_{\rm AFR}$	$R_{\rm LS}/R_{\rm GFG}$	$R_{\rm RBMR.}$	$R_{\rm BM}$
		days	$\frac{R}{R_{\odot}}$	$\frac{R}{R_{\odot}}$	$\frac{R}{R_{\odot}}$	$\frac{R}{R_{\odot}}$	$\frac{R}{R_{\odot}}$	$\frac{R}{R_{\odot}}$
FF Aql^*	O	4.470840	49.8	54.1	52.0	-	-	-
FM Aql	-	6.114334	56.5	59.3	59.3	-	60.6	51.61
FN Aql	-	9.481614	83.5	86.5	-	-	-	-
$\eta$ Aql	B	7.176779	48.2	52.6	67.5	-	56.7	52.76
TT Aql	-	13.75551	84.3	-	76.1	-	95.3	94.31
U Aql	O	7.024100	45.4	47.0	48.9	-	61.3	52.45
V496 Aql	B	6.807164	47.7	61.2	38.1	-	36.4	43.69
V600 Aql	-	7.238748	55.4	8 0.1	56.3	-	-	-
RX Aur	B:	11.623537	83.7	81.0	-	-	-	61.17
RT Aur	-	3.728561	27.9	30.6	36.2	-	42.2	35.74
$\delta$ Cep	V	5.366316	41.0	47.2	46.2	-	52.8	39.84
DT Cyg^*	-	2.499086	46.4	38.7	32.3	-	42.9	-
SU Cyg	O	3.845733	35.4	40.8	48.9	-	61.3	52.45
X Cyg	-	16.386130	104.1	-	69.3	-	96.2	114.29
VZ Cyg	O	4.864504	45.3	53.1	35.8	-	47.3	35.57
BG Cru^*	-	3.342503	28.9	32.7	-	-	-	-
$\zeta$ Gem	V	10.150780	64.4	75.0	55.1	-	86.2	62.55
W Gem	-	7.913960	96.9	86.4	48.5	-	60.7	48.69
BG Lac	b	5.331938	47.0	48.9	-	-	35.8	43.49
X Lac	b	5.444990	41.3	46.9	36.7	-	71.2	61.97
Z Lac	O	10.88554	67.2	69.4	83.1	-	86.8	66.40
BF Oph	b	4.067695	39.9	44.8	-	36.11^a/ 35.8^b	32.4	33.78
Y Oph	b	17.126780	96.3	93.4	-	93.22^a	112.2	-
AW Per	O	6.463589	29.7	37.5	34.7	-	54.8	45.40
V440 Per^*	B:	7.572712	62.9	76.8	-	-	-	-
CM Sct	-	3.916977	38.4	38.6	29.6	-	-	-
EV Sct	B:	3.090998	30.9	42.0	-	47.62^a/ 32.5^b	36.6	-
SS Sct	-	3.671280	39.6	44.2	30.4	-	-	27.71
RU Sct	-	19.70062	102.9	-	-	120.45^a	-	-
Y Sct	b	10.341650	60.9	-	-	-	71.5	80.45
AP Sgr	B:	5.0574269	60.4	62.3	36.6	-	50.0	-
S Sge	O	8.382044	75.1	79.1	64.6	-	-	-
BB Sgr	-	6.637115	47.6	61.3	-	37.39^a /44.4^b	53.5	40.42
U Sgr	-	6.745363	76.6	82.5	-	52.30^a/ 48.8^b	-	57.61
V350 Sgr	O	5.154557	32.1	32.7	40.2	-	46.0	49.55
X Sgr	-	7.012630	52.5	59.8	68.5	-	58.6	47.76
Y Sgr	B	5.773400	47.4	56.2	-	-	61.4	47.95
YZ Sgr	-	9.553606	93.6	95.8	-	-	136.0	-
W Sgr	O	7.595080	58.6	62.6	62.5	-	58.6	60.77
WZ Sgr	B	21.849708	120.5	-	-	121.43^a /122.2^b	-	151.20
SV Vul	B	44.999660	213.0	-	135.6	241.62^a/ 250.7^b	-	189.5
T Vul	b	4.435532	31.8	37.1	42.3	-	48.8	36.54
U Vul	O	7.990736	75.0	84.4	57.9	-	61.1	54.34

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