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Titolo:
zeta Orionis A is a double star
Autore:
Hummel, CA; White, NM; Elias, NM; Hajian, AR; Nordgren, TE;
Indirizzi:
USN Observ, Astrometry Dept, Washington, DC 20392 USA USN Observ Washington DC USA 20392 rometry Dept, Washington, DC 20392 USA Lowell Observ, Flagstaff, AZ 86001 USA Lowell Observ Flagstaff AZ USA 86001 well Observ, Flagstaff, AZ 86001 USA USN Observ, NPOI, Flagstaff, AZ 86002 USA USN Observ Flagstaff AZ USA 86002 N Observ, NPOI, Flagstaff, AZ 86002 USA
Titolo Testata:
ASTROPHYSICAL JOURNAL
fascicolo: 2, volume: 540, anno: 2000,
parte:, 2
pagine: L91 - L93
SICI:
0004-637X(20000910)540:2<L91:ZOAIAD>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTOTYPE OPTICAL INTERFEROMETER;
Keywords:
binaries : visual; stars : individual (zeta Orionis A); techniques : interferometric;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Hummel, CA USN Observ, Astrometry Dept, 3450 Massachusetts Ave NW, Washington, DC 20392 USA USN Observ 3450 Massachusetts Ave NW Washington DC USA 20392 SA
Citazione:
C.A. Hummel et al., "zeta Orionis A is a double star", ASTROPHYS J, 540(2), 2000, pp. L91-L93

Abstract

A close, 4th magnitude companion to zeta Orionis A has been resolved with the Navy Prototype Optical Interferometer at Lowell Observatory. This confirms an indication of multiplicity from observations with the stellar intensity interferometer at Narrabri 26 years ago. The new component in the multiple system ADS 4263, zeta Orionis Ab, is 2 mag fainter than Aa, which is a supergiant of type O9.5. During 1998 February and March, the pair had a mean separation of 42 mas. Orbital motion was subsequently detected, but the corresponding are allows only a preliminary ephemeris.

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Documento generato il 23/11/20 alle ore 21:48:32