Hubble Space Telescope Astrometry in the Orion Nebula Cluster: Census of Low-mass Runaways
نویسندگان
چکیده
منابع مشابه
Hubble Space Telescope Measures of Mass Accretion Rates in the Orion Nebula Cluster
The present observational understanding of the evolution of the mass accretion rates (Ṁacc) in pre-main-sequence stars is limited by the lack of accurate measurements of Ṁacc over homogeneous and large statistical samples of young stars. Such observational effort is needed to properly constrain the theory of star formation and disk evolution. Based on Hubble Space Telescope/WFPC2 observations, ...
متن کاملStar Formation in Space and Time: the Orion Nebula Cluster
We examine the pattern of star birth in the Orion Nebula cluster (ONC), with the goal of discerning the cluster’s formation mechanism. Outside the Trapezium, the distribution of stellar masses is remarkably uniform and is not accurately described by the field-star initial mass function. The deconvolved, three-dimensional density of cluster members peaks at the Trapezium stars, which are truly a...
متن کاملExternally Illuminated Young Stellar Environments in the Orion Nebula: Hubble Space Telescope Planetary Camera and Uv Observations
We present new 0.05 00 (22 AU) resolution narrow-band Hubble Space Telescope Planetary Camera images of externally illuminated young stellar objects embedded in the Orion Nebula. We also present 0.02 00 (9 AU) resolution UV images of 7 externally illuminated proto-stellar environments and the rst UV spectra that cover the spectral range between 1400 and 3000 A. We discuss 43 objects for which t...
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...
متن کاملRotation in the Orion Nebula Cluster
Eighteen small (4 arc-min square) fields within the Orion Nebula Cluster (ONC) have been photometrically monitored for one or more observing seasons between 1990 and 1999 with a CCD attached to the 0.6 m telescope at Van Vleck Observatory on the campus of Wesleyan University. Data were obtained exclusively in the Cousins I band on between 25 and 40 nights per season. Results from the first thre...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2020
ISSN: 1538-3881
DOI: 10.3847/1538-3881/ab8d42