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$\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics
We obtain restrictions on the universal baryon fraction, $f_B = \Omega_{B}/ \Omega_{0}$, by assuming that the observed microlensing events towards the Large Magellanic Cloud are due to baryonic MACHOs in the halo of the Galaxy and by extracting a bound to the total mass of the Milky Way from the mot...
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1998
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1086/307657 http://cds.cern.ch/record/347487 |
| _version_ | 1780891997229285376 |
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| author | Steigman, G. Tkachev, I. |
| author_facet | Steigman, G. Tkachev, I. |
| author_sort | Steigman, G. |
| collection | CERN |
| description | We obtain restrictions on the universal baryon fraction, $f_B = \Omega_{B}/ \Omega_{0}$, by assuming that the observed microlensing events towards the Large Magellanic Cloud are due to baryonic MACHOs in the halo of the Galaxy and by extracting a bound to the total mass of the Milky Way from the motion of tracer galaxies in the Local Group. We find a lower bound $f_B > 0.29^{+0.18}_{-0.15}$ . Consistency with the predictions of primordial nucleosynthesis leads to the further constraint on the total mass density, $\Omega_{0} \lesssim {0.2}$ |
| id | cern-347487 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1998 |
| record_format | invenio |
| spelling | cern-3474872023-03-14T17:01:39Zdoi:10.1086/307657http://cds.cern.ch/record/347487engSteigman, G.Tkachev, I.$\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group DynamicsAstrophysics and AstronomyWe obtain restrictions on the universal baryon fraction, $f_B = \Omega_{B}/ \Omega_{0}$, by assuming that the observed microlensing events towards the Large Magellanic Cloud are due to baryonic MACHOs in the halo of the Galaxy and by extracting a bound to the total mass of the Milky Way from the motion of tracer galaxies in the Local Group. We find a lower bound $f_B > 0.29^{+0.18}_{-0.15}$ . Consistency with the predictions of primordial nucleosynthesis leads to the further constraint on the total mass density, $\Omega_{0} \lesssim {0.2}$astro-ph/9803008oai:cds.cern.ch:3474871998-03-03 |
| spellingShingle | Astrophysics and Astronomy Steigman, G. Tkachev, I. $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title | $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title_full | $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title_fullStr | $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title_full_unstemmed | $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title_short | $\Omega ^B$ and $\Omega ^0$ from MACHOs and Local Group Dynamics |
| title_sort | $\omega ^b$ and $\omega ^0$ from machos and local group dynamics |
| topic | Astrophysics and Astronomy |
| url | https://dx.doi.org/10.1086/307657 http://cds.cern.ch/record/347487 |
| work_keys_str_mv | AT steigmang omegabandomega0frommachosandlocalgroupdynamics AT tkachevi omegabandomega0frommachosandlocalgroupdynamics |