M82-F: a doomed super star cluster?
نویسندگان
چکیده
منابع مشابه
M 82 - F : A Doomed Super Star Cluster ? ⋆
We present high dispersion echelle spectroscopy of the very luminous, young super star cluster (SSC) ‘F’ in M82, obtained with the 4.2-m William Herschel Telescope (WHT), for the purpose of deriving its dynamical mass and assessing whether it will survive to become an old globular cluster. In addition to the stellar lines, the spectrum contains complex Na I absorption and broad emission lines f...
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We investigate the Initial Mass Function and mass segregation in super–star cluster M82-F with high resolution Keck/NIRSPEC echelle spectroscopy. Cross-correlation with template supergiant spectra provides the velocity dispersion of the cluster, enabling measurement of the kinematic (virial) mass of the cluster when combined with sizes from NICMOS and ACS images. We find a mass of 6.6±0.9×10M⊙ ...
متن کامل1 Evolved Super Star Clusters in M82
We present high-resolution optical and near-infrared HST observations of two adjacent regions in the fossil star-burst region in M82, B1 and B2. Age estimates date the cluster population in the fossil star-burst between ∼ 2 × 10 8 and ∼ 10 × 10 9 years, assuming solar metallicity. The star cluster population in B2 is more heavily affected by internal extinction than that in B1. Although our clu...
متن کاملSuper–star Cluster Velocity Dispersions and Virial Masses in the M82 Nuclear Starburst
We use high-resolution near-infrared spectroscopy from Keck Observatory to measure the stellar velocity dispersions of 19 super star clusters (SSCs) in the nuclear starburst of M82. The clusters have ages on the order of 10 Myr, which is many times longer than the crossing times implied by their velocity dispersions and radii. We therefore apply the Virial Theorem to derive the kinematic mass f...
متن کاملStellar Populations and Ages of M82 Super Star Clusters
We present high signal-to-noise optical spectra of two luminous super star clusters in the starburst galaxy M82. The data for cluster F and the nearby, highly reddened cluster L were obtained with the William Herschel Telescope (WHT) at a resolution of 1.6 Å. The blue spectrum (3250–5540Å) of cluster F shows features typical of midB stars. The red spectra (5730–8790Å) of clusters F and L show t...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2001
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2001.04627.x