2023
DOI: 10.48550/arxiv.2301.05139
|View full text |Cite
Preprint
|
Sign up to set email alerts
|

Probing the Milky Way stellar and brown dwarf initial mass function with modern microlensing observations

Abstract: We use recent microlensing observations toward the central bulge of the Galaxy to probe the overall stellar plus brown dwarf initial mass function (IMF) in these regions well within the brown dwarf domain. We find that the IMF is consistent with the same Chabrier (2005) IMF characteristic of the Galactic disk. In contrast, other IMFs suggested in the literature overpredict the number of shorttime events, thus of very-low mass stars and brown dwarfs, compared with observations. This, again, supports the suggest… Show more

Help me understand this report
View published versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
2

Citation Types

0
2
0

Year Published

2023
2023
2023
2023

Publication Types

Select...
2

Relationship

0
2

Authors

Journals

citations
Cited by 2 publications
(2 citation statements)
references
References 57 publications
0
2
0
Order By: Relevance
“…To establish the fraction of FFPs to stars, large samples with robust uncertainties and low contamination rates are needed to provide a statistically significant answer. Recently, some works have measured the mass function of the field population reaching planetary mass objects (Kirkpatrick et al, 2019(Kirkpatrick et al, , 2021Bardalez Gagliuffi et al, 2019;Chabrier and Lenoble, 2023). However, these mass functions are the combination of different star formation events which happened over several Gyr and thus, might differ from the initial mass function reported by simulations of star formation.…”
Section: Possibly a Combination Of Several Mechanismsmentioning
confidence: 99%
“…To establish the fraction of FFPs to stars, large samples with robust uncertainties and low contamination rates are needed to provide a statistically significant answer. Recently, some works have measured the mass function of the field population reaching planetary mass objects (Kirkpatrick et al, 2019(Kirkpatrick et al, , 2021Bardalez Gagliuffi et al, 2019;Chabrier and Lenoble, 2023). However, these mass functions are the combination of different star formation events which happened over several Gyr and thus, might differ from the initial mass function reported by simulations of star formation.…”
Section: Possibly a Combination Of Several Mechanismsmentioning
confidence: 99%
“…To establish the fraction of FFPs to stars, large samples with robust uncertainties and low contamination rates are needed to provide a statistically significant answer. Recently, some works have measured the mass function of the field population reaching planetary mass objects (Kirkpatrick et al 2019(Kirkpatrick et al , 2021Bardalez Gagliuffi et al 2019;Chabrier and Lenoble 2023). However, these mass functions are the combination of different star formation events which happened over several Gyr and thus, might differ from the initial mass function reported by simulations of star formation.…”
Section: Possibly a Combination Of Several Mechanismsmentioning
confidence: 99%