Microlensing Constraints on the Stellar and Planetary Mass Functions
The mass function (MF) of isolated objects measured by microlensing consists of both a stellar and a planetary component. We compare the microlensing MFs of A. Gould et al. and T. Sumi et al. to other measurements of the MF. The abundance of brown dwarfs from the tail of the T. Sumi et al. stellar M...
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IOP Publishing
2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-3881/adeb84 |
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| author | Jennifer C. Yee Scott J. Kenyon |
| author_facet | Jennifer C. Yee Scott J. Kenyon |
| author_sort | Jennifer C. Yee |
| collection | DOAJ |
| description | The mass function (MF) of isolated objects measured by microlensing consists of both a stellar and a planetary component. We compare the microlensing MFs of A. Gould et al. and T. Sumi et al. to other measurements of the MF. The abundance of brown dwarfs from the tail of the T. Sumi et al. stellar MF is consistent with measurements from the local solar neighborhood. Microlensing free-floating planets ( μ FFPs) may be free-floating or orbit host stars with semimajor axes a ≳ 10 au and therefore can constrain the populations of both free-floating and wide-orbit planets. Comparisons to radial velocity and direct imaging low-mass companion populations suggest that either most of the μ FFP population with masses > 1 M _Jup is bound to hosts more massive than M dwarfs, or some fraction of the observed companion population 1 M _Jup < m _p < 0.08 M _⊙ actually comes from the low-mass tail of the stellar MF. The μ FFP population also places strong constraints on planets inferred from debris disks and gaps in protoplanetary disks observed by the Atacama Large Millimeter/submillimeter Array. |
| format | Article |
| id | doaj-art-dca2ae2475b04323b3553a663b344656 |
| institution | DOAJ |
| issn | 1538-3881 |
| language | English |
| publishDate | 2025-01-01 |
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| spelling | doaj-art-dca2ae2475b04323b3553a663b3446562025-08-20T03:16:01ZengIOP PublishingThe Astronomical Journal1538-38812025-01-01170213210.3847/1538-3881/adeb84Microlensing Constraints on the Stellar and Planetary Mass FunctionsJennifer C. Yee0https://orcid.org/0000-0001-9481-7123Scott J. Kenyon1https://orcid.org/0000-0003-0214-609XCenter for Astrophysics ∣Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USA ; jyee@cfa.harvard.eduCenter for Astrophysics ∣Harvard & Smithsonian , 60 Garden St., Cambridge, MA 02138, USA ; jyee@cfa.harvard.eduThe mass function (MF) of isolated objects measured by microlensing consists of both a stellar and a planetary component. We compare the microlensing MFs of A. Gould et al. and T. Sumi et al. to other measurements of the MF. The abundance of brown dwarfs from the tail of the T. Sumi et al. stellar MF is consistent with measurements from the local solar neighborhood. Microlensing free-floating planets ( μ FFPs) may be free-floating or orbit host stars with semimajor axes a ≳ 10 au and therefore can constrain the populations of both free-floating and wide-orbit planets. Comparisons to radial velocity and direct imaging low-mass companion populations suggest that either most of the μ FFP population with masses > 1 M _Jup is bound to hosts more massive than M dwarfs, or some fraction of the observed companion population 1 M _Jup < m _p < 0.08 M _⊙ actually comes from the low-mass tail of the stellar MF. The μ FFP population also places strong constraints on planets inferred from debris disks and gaps in protoplanetary disks observed by the Atacama Large Millimeter/submillimeter Array.https://doi.org/10.3847/1538-3881/adeb84ExoplanetsGravitational microlensing exoplanet detectionDebris disksProtoplanetary disks |
| spellingShingle | Jennifer C. Yee Scott J. Kenyon Microlensing Constraints on the Stellar and Planetary Mass Functions The Astronomical Journal Exoplanets Gravitational microlensing exoplanet detection Debris disks Protoplanetary disks |
| title | Microlensing Constraints on the Stellar and Planetary Mass Functions |
| title_full | Microlensing Constraints on the Stellar and Planetary Mass Functions |
| title_fullStr | Microlensing Constraints on the Stellar and Planetary Mass Functions |
| title_full_unstemmed | Microlensing Constraints on the Stellar and Planetary Mass Functions |
| title_short | Microlensing Constraints on the Stellar and Planetary Mass Functions |
| title_sort | microlensing constraints on the stellar and planetary mass functions |
| topic | Exoplanets Gravitational microlensing exoplanet detection Debris disks Protoplanetary disks |
| url | https://doi.org/10.3847/1538-3881/adeb84 |
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