On the mass of the Galactic star cluster NGC 4337
Only a small number of galactic open clusters survives for longer than few hundred million years. Longer lifetimes are routinely explained in term of larger initial masses, particularly quiet orbits, and off-plane birth-places. We derive in this work the actual mass of NGC 4337, one of the few open...
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| Autores principales: | , , , , |
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| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2017
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/124622 |
| Aporte de: |
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I19-R120-10915-124622 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Ciencias Astronómicas (Galaxy): open clusters and associations: general (Galaxy): open clusters and associations: individual: NGC 4337 |
| spellingShingle |
Ciencias Astronómicas (Galaxy): open clusters and associations: general (Galaxy): open clusters and associations: individual: NGC 4337 Seleznev, A. F. Carraro, Giovanni Capuzzo Dolcetta, Roberto Monaco, Lorenzo Baume, Gustavo Luis On the mass of the Galactic star cluster NGC 4337 |
| topic_facet |
Ciencias Astronómicas (Galaxy): open clusters and associations: general (Galaxy): open clusters and associations: individual: NGC 4337 |
| description |
Only a small number of galactic open clusters survives for longer than few hundred million years. Longer lifetimes are routinely explained in term of larger initial masses, particularly quiet orbits, and off-plane birth-places. We derive in this work the actual mass of NGC 4337, one of the few open clusters in the Milky Way inner disk that managed to survive for about 1.5 Gyr. We derive its mass in two different ways. First, we exploit an unpublished photometric data set in the UBVI passbands to estimate -using star counts- the cluster luminosity profile, and luminosity and mass function, and hence its actual mass both from the luminosity profile and from the mass function.This data-set is also used to infer crucial cluster parameters, as the cluster half-mass radius and distance. Second, we make use of a large survey of cluster star radial velocities to derive dynamical estimates for the cluster mass. Under the assumption of virial equilibrium and neglecting the external gravitational field leads to values for the mass significantly larger than those obtained by mean of observed density distribution or with the mass function but still marginally compatible with the inferred values of the invisible mass in form of both low mass stars or remnants of high mass stars in the cluster. Finally, we derive the cluster initial mass by computing the mass loss experienced by the cluster during its lifetime, and adopting the various estimates of the actual mass. |
| format |
Articulo Preprint |
| author |
Seleznev, A. F. Carraro, Giovanni Capuzzo Dolcetta, Roberto Monaco, Lorenzo Baume, Gustavo Luis |
| author_facet |
Seleznev, A. F. Carraro, Giovanni Capuzzo Dolcetta, Roberto Monaco, Lorenzo Baume, Gustavo Luis |
| author_sort |
Seleznev, A. F. |
| title |
On the mass of the Galactic star cluster NGC 4337 |
| title_short |
On the mass of the Galactic star cluster NGC 4337 |
| title_full |
On the mass of the Galactic star cluster NGC 4337 |
| title_fullStr |
On the mass of the Galactic star cluster NGC 4337 |
| title_full_unstemmed |
On the mass of the Galactic star cluster NGC 4337 |
| title_sort |
on the mass of the galactic star cluster ngc 4337 |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/124622 |
| work_keys_str_mv |
AT seleznevaf onthemassofthegalacticstarclusterngc4337 AT carrarogiovanni onthemassofthegalacticstarclusterngc4337 AT capuzzodolcettaroberto onthemassofthegalacticstarclusterngc4337 AT monacolorenzo onthemassofthegalacticstarclusterngc4337 AT baumegustavoluis onthemassofthegalacticstarclusterngc4337 |
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Repositorios |
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1764820450759671811 |