The Nebula in Orion--Request to Astronomers
نویسندگان
چکیده
منابع مشابه
The distance to the Orion Nebula
We have used the Very Long Baseline Array to measure the trigonometric parallax of several member stars of the Orion Nebula Cluster showing non-thermal radio emission. We have determined the distance to the cluster to be 414 ± 7 pc. Our distance determination allows for an improved calibration of luminosities and ages of young stars. We have also measured the proper motions of four cluster star...
متن کاملThe distance to the Orion Nebula Cluster
The distance to the Orion Nebula Cluster (ONC) is estimated using the rotational properties of its low-mass pre main-sequence (PMS) stars. Rotation periods, projected equatorial velocities and distance-dependent radius estimates are used to form an observational sin i distribution (where i is the axial inclination), which is modelled to obtain the distance estimate. A distance of 440± 34,pc is ...
متن کاملThe Orion Nebula in the mid - Ir
We present two wide-field (≈ 5 × 3.5), diffraction limited (λ/D ≃ 0.5 at 10 μm), broad-band 10 μm and 20 μm images of the Orion Nebula, plus six 7–13 μm narrow-band (λ/∆λ ≃ 1) images of the BN/KL complex taken at the 3.8m UKIRT telescope with the MPIA MAX camera. The wide field images, centered on the Trapezium and BN/KL regions, are mosaics of 35 × 35 frames obtained with standard chopping and...
متن کاملThe Orion Nebula in the Mid-infrared
Q1 We present two wide-field ( 50 ; 3A5), diffraction-limited (k=D ’ 0B5 at 10 m), broadband 10 and 20 m images of the Orion Nebula, plus six 7–13 m narrowband (k= k ’ 1) images of the BN/KL complex taken at the 3.8 m UKIRT Q2 telescope with the MPIA MAX camera. The wide-field images, centered on the Trapezium and BN/KL regions, are mosaics of 3500 ; 3500 frames obtained with standard chopping ...
متن کاملWide binaries in the Orion Nebula Cluster
Using proper motion data for 894 stars in the Orion Nebula Cluster (ONC) compiled by Jones & Walker in 1988, we search for binaries with apparent separations in the range 1000–5000 AU, and find an upper limit of three. Using a Monte Carlo method, we test the consistency of this result with two hypotheses: i) that the cluster contains a binary population identical to that found in the solar neig...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1877
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/37.5.231a