The VLT-FLAMES Tarantula Survey - V. The peculiar B[e]-like supergiant, VFTS698, in 30 Doradus

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Table 7

Comparison of orbital and stellar parameters of VFTS698 derived here with those for known sgB[e] stars and interacting binary systems.

System	Galaxy	Orb. period	Spectral type		log L/L_⊙		T_eff		log g		Ref.
		(days)					(kK)		log (cm s^-2)
			Pri.	Sec.	Pri.	Sec.	Pri.	Sec.	Pri.	Sec.

VFTS698	LMC	12.7	mid B	early B	5.0	5.3	18.0	26.0	3.0^*	3.3	This work

Comparison B[e] stars:

Hen S22	LMC	...	B0 – B0.5	...	5.9	...	23.0	...	...	...	1
Hen S35	LMC	...	B1[e] Iab	...	5.2	...	22.0	...	3.0	...	2
R4	SMC	7774.5	B0.5	A	5.0	4.2	27.0	9.5	3.2	2.5	3
R50	SMC	...	B2 – B3	...	5.7	...	17.0	...	...	...	1

Comparison interacting binaries:

RY Scuti	MW	11.1	O9.7 Ibpe	B0.5 I	> 5.0	> 5.0	27.0–30.0	27.0–30.0	3.0	3.0	4,5
β Lyrae	MW	12.9	B?	B6-8 II	4.4	3.8	30.0	15.0	...	...	6,7

Notes.

^(*)

Assumed value;

⁽¹⁾

Zickgraf et al. (1986);

⁽²⁾

Gummersbach et al. (1995);

⁽³⁾

Zickgraf et al. (1996);

⁽⁴⁾

Grundstrom et al. (2007);

⁽⁵⁾

Men’shchikov & Miroshnichenko (2005);

⁽⁶⁾

De Greve & Linnell (1994);

⁽⁷⁾

Harmanec et al. (1996).

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