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The mass function of NGC288
Astrophysics · Submitted 23 Aug 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim This result is fully consistent with the global mass function derived by Paresce & De Marchi (2000) for a sample of 12 globular clusters with very different dynamical histories, thus confirming that near the cluster's half-light radius the mass function appears ``undistorted'' by evaporation or tidal interactions with the Galaxy and should then reflect the initial mass function.
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The abstract, sentence by sentence
We present NICMOS NIC3 observations of the Galactic globular cluster NGC 288, taken South - East at 2.4 times the cluster's half-light radius in the J and H bands. We have detected the cluster main sequence down to J~25 and H~24. The corresponding luminosity function covers the range 3<M_H<9 and peaks at M_H~6.8. The theoretical tracks of Baraffe et al. (1997) at [Fe/H]=-1.3 give a mass function which is best fitted by a log-normal distribution with characteristic mass m_c=0.42 Msolar and a standard deviation sigma=0.35. This result is fully consistent with the global mass function derived by Paresce & De Marchi (2000) for a sample of 12 globular clusters with very different dynamical histories, thus confirming that near the cluster's half-light radius the mass function appears ``undistorted'' by evaporation or tidal interactions with the Galaxy and should then reflect the initial mass function.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We present NICMOS NIC3 observations of the Galactic globular cluster NGC 288, taken South - East at 2.4 times the cluster's half-light radius in the J and H bands. | method 0.80 | 0.97 | 0.02 | asserted 0.99 |
| s1 | We have detected the cluster main sequence down to J~25 and H~24. | result 0.99 | 0.97 | 0.03 | asserted 1.00 |
| s2 | The corresponding luminosity function covers the range 3<M_H<9 and peaks at M_H~6.8. | result 1.00 | 0.91 | 0.05 | asserted 1.00 |
| s3 | The theoretical tracks of Baraffe et al. (1997) at [Fe/H]=-1.3 give a mass function which is best fitted by a log-normal distribution with characteristic mass m_c=0.42 Msolar and a standard deviation sigma=0.35. | result 1.00 | 0.77 | 0.34 | asserted 0.97 |
| s4 | This result is fully consistent with the global mass function derived by Paresce & De Marchi (2000) for a sample of 12 globular clusters with very different dynamical histories, thus confirming that near the cluster's half-light radius the mass function appears ``undistorted'' by evaporation or tidal interactions with the Galaxy and should then reflect the initial mass function. | interpretation 1.00 | 0.28 | 0.75 | asserted 0.53 |
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Original abstract
We present NICMOS NIC3 observations of the Galactic globular cluster NGC 288, taken South - East at 2.4 times the cluster's half-light radius in the J and H bands. We have detected the cluster main sequence down to J~25 and H~24. The corresponding luminosity function covers the range 3<M_H<9 and peaks at M_H~6.8. The theoretical tracks of Baraffe et al. (1997) at [Fe/H]=-1.3 give a mass function which is best fitted by a log-normal distribution with characteristic mass m_c=0.42 Msolar and a standard deviation sigma=0.35. This result is fully consistent with the global mass function derived by Paresce & De Marchi (2000) for a sample of 12 globular clusters with very different dynamical histories, thus confirming that near the cluster's half-light radius the mass function appears ``undistorted'' by evaporation or tidal interactions with the Galaxy and should then reflect the initial mass function.
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