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Suhail al Muhlif

HIP 39953; Gamma2 Vel

관측 가능한 이중성 우수 (64/100)

Sep: 41.2", Companion: mag 4.1

HIP 39953; Gamma2 Vel DoubleStar Vel 관측 가능 난이도 2 Small telescope (4") - Requires steady seeing
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물리적 특성

등급 1.78
범위 1.81 - 1.87
주기 78.530 일
변광성 유형 Wolf-Rayet Variable
분광형 WC 8
항성 색상 파랑 (B-V -0.22)
거리 1256.8 ly

위치 & 식별자

RA 08h 09m 32.0s
Dec -47° 20' 12.0"
별자리 Vel
HR 3207
HIP 39953
Bayer Gamma2
Variable ID Gam2 Vel

가시성

사용자 설정에서 관측지를 설정하세요 가시성 데이터를 확인할 수 있습니다.

광도 곡선

다중 항성계

구성 항성 5
구성 ID AB
이격 41.2″
동반성 등급 4.1
동반성 분광형 O9I
위치각 221°
항성 색상 A: 파랑 B: 파랑
발견자 DUN 65

접안렌즈 시야

80x Dawes: 1.9″ TFOV: 0.6°
실제 = 실제 각크기
N E 221° A (1.8) B (4.1)

Sep: 41.2″ · PA: 221° · 위=북, 왼쪽=동

분해됨 · Rayleigh: 2.3″ · Dawes: 1.9″ · Eff: 3.1″

크기 비교

VizieR에서 항성 데이터 조회 중…

항성의 진화

분광 분류

헤르츠스프룽-러셀 도표

HR 도표 로드 중…

흑체 복사 스펙트럼

항성 흡수 스펙트럼

스펙트럼 유형을 기반으로 한 시뮬레이션 흡수 스펙트럼. 선 위에 마우스를 올려 원소를 식별하세요.

항성 참고사항

1.6 - 1.8V, 154 sec. Sp. var. in about 200 sec. Variability too great to be explained by the 78.5d SB companion. | Possibly a third close companion: a collapsed star of less than 2 solar masses.
See HR 3206. Mag. and colors blended with other companions. C = CoD -46d3848, 7.65V, B6V at 63", physical. D, 9.07V, | Am at 94", SB, over 7d?, optical.
Comp. A of visual double, 78.5d, K 43.1k/s, V0 -18.0k/s, asini 45.8. Alternate orbit 78.5002d, K 70k/s, | V0 +12k/s, msin3i 32, asini 67. Possible mass transfer from WR to O-type component.
Gamma Velorum group which includes HR 3206, probably also HD 68157 at 20' and HR 3213 at 36' from A; HII region.
Magnesium and iron depleted by factor of 100 relative to the sun. UV spectrum dominated by supergiant companions. The | Wolf-Rayet component appears to be the most massive known. Radio emission indicates a circumstellar gas cloud extending | beyond the orbit of the binary. Also classified WC8+O7.5e.
Suhail al Muhlif; Al Suhail al Muhlif; "Spectral Gem of Southern Skies".
Diam. = 0.00043 - 0.00044".

서베이 이미지

서베이 이미지 로드 중…

Suhail al Muhlif 소개

설명

Regor (also called Suhail al Muhlif) is one of the most remarkable star systems visible to the naked eye at magnitude 1.78. The primary is a Wolf-Rayet star (spectral type WC8) in a binary with an O9 supergiant, located about 1,100 light-years away. Wolf-Rayet stars are extremely hot, massive stars that are blowing off their outer layers in powerful stellar winds at thousands of km/s, exposing their helium-burning cores.

관측 팁

Gamma Vel lies in the rich Milky Way fields of Vela and is one of the finest wide double stars in the sky — a small telescope reveals a brilliant pair of blue-white stars separated by about 41 arcseconds. The surrounding star field is gorgeous in binoculars. Visible from the southern hemisphere and low northern latitudes. Best observed February through May.

역사

The informal name Regor (Roger spelled backwards) was a joke by Apollo 1 astronaut Gus Grissom, honoring crewmate Roger Chaffee. The name stuck in some usage. Gamma Vel was one of the first Wolf-Rayet stars identified, and its extreme spectral features have made it a prototype for studying massive stellar evolution.

재미있는 사실

The Wolf-Rayet component of Gamma Vel is losing mass at an extraordinary rate — shedding roughly one Earth mass per year through its fierce stellar wind. This wind collides with the O-star companion's wind, creating a cone of shocked, superheated gas that emits X-rays. The star is a supernova candidate.