"Physical elements of the eclipsing binary \u03B4 Orionis" . "12"^^ . . . "520" . . "eclipsing binaries; early-type stars; fundamental parameters"@en . . "Bo\u017Ei\u010D, H." . . . "The main result of this paper is to show that the observed line spectra of \u03B4 Orionis are composed of the lines of the O9.5 II primary and a similarly hot tertiary, while the lines of a cooler B-type secondary are too faint to be detected in the available spectra."@en . . "000283064200083" . "\u0160lechta, Miroslav" . "FR - Francouzsk\u00E1 republika" . "1"^^ . . . "278909" . "The main result of this paper is to show that the observed line spectra of \u03B4 Orionis are composed of the lines of the O9.5 II primary and a similarly hot tertiary, while the lines of a cooler B-type secondary are too faint to be detected in the available spectra." . "Physical elements of the eclipsing binary \u03B4 Orionis"@en . . "Harmanec, P." . "Physical elements of the eclipsing binary \u03B4 Orionis"@en . . "RIV/67985815:_____/10:00355065" . . "Physical elements of the eclipsing binary \u03B4 Orionis" . "Mayer, P." . "5"^^ . . . "Astronomy & Astrophysics" . "RIV/67985815:_____/10:00355065!RIV15-GA0-67985815" . . "Sep-Oct" . "0004-6361" . . "[B4FC0D43DC80]" . "10.1051/0004-6361/200913796" . . . "P(GA205/06/0304), P(GA205/06/0584), P(GAP209/10/0715), Z(AV0Z10030501), Z(MSM0021620860)" . . "Wolf, M." . .