Наблюдения за лензированием квазаров тоже ограничивает число черных дыр — в лучшем случае до 0.4 масс Солнца, возможно и меньше
New evidence for a cosmological distribution of stellar mass primordial black holes
https://arxiv.org/pdf/2204.09143
...
Our analysis is based on the lightcurves of a sample of over
1000 quasars, photometrically monitored over a period of 26 year
For a lens mass of 1𝑀 the
distant source will be split into two or more images with a separa-
tion of the order of 106 arcsec, resulting in a change of observed
integrated brightness.
1993
The amplitude distribution for each
model was then compared with the observed amplitudes for a sample
of 117 quasar lightcurves covering a period of 10 years (Hawkins &
Véron 1993). The results of this study were that in almost all cases the
expected microlensing amplitudes from the simulations were greater
than those observed in the quasar sample
source radius, which Schneider set to 1015 cm or 0.4 lt-day. imply values
an order of magnitude larger than this, with a characteristic radius of around 4 lt-day.
with the dark matter
made up of 0•3𝑀 compact bodies.
This provides a consistent explanation for the difference between the
Palomar-Green lack of correlation of amplitude with luminosity, and
the well-known anti-correlation seen in other samples
The unidentified population
of compact bodies detected by Alcock et al. (2000) were found to have
a characteristic mass of around 0•3𝑀 , which is the the same as the
mass used to account for the observed microlensing in galaxy halos
(Mediavilla et al. 2009; Pooley et al. 2012) and clusters (Hawkins
2020b). It is also close to the preferred mass of 0•7𝑀 from
theoretical studies of primordial black hole formation during the
QCD phase transition
-
Probing compact dark matter objects with microlensing
in gravitationally lensed quasars
https://www.aanda.org/articles/aa/pdf/2023/05/aa45615-22.pdf
Given our current sample, we show that the standard scenario cannot be rejected, in contrast with previous results by
Hawkins (2020a, A&A, 633, A107), claiming that a population of stellar mass primordial black holes (PBHs) is necessary to explain
the observed amplitude of the microlensing signal in lensed quasar light curves.
900 microlensing curves from the Rubin Observatory will be sufficient to discriminate between the two extreme scenarios at a 95%
confidence level.
Other options:
no subject
Наблюдения за лензированием квазаров тоже ограничивает число черных дыр — в лучшем случае до 0.4 масс Солнца, возможно и меньше
New evidence for a cosmological distribution of stellar mass primordial black holes
https://arxiv.org/pdf/2204.09143
...
Our analysis is based on the lightcurves of a sample of over
1000 quasars, photometrically monitored over a period of 26 year
...
For a lens mass of 1𝑀 the
distant source will be split into two or more images with a separa-
tion of the order of 106 arcsec, resulting in a change of observed
integrated brightness.
...
1993
The amplitude distribution for each
model was then compared with the observed amplitudes for a sample
of 117 quasar lightcurves covering a period of 10 years (Hawkins &
Véron 1993). The results of this study were that in almost all cases the
expected microlensing amplitudes from the simulations were greater
than those observed in the quasar sample
...
source radius, which Schneider set to 1015 cm or 0.4 lt-day. imply values
an order of magnitude larger than this, with a characteristic radius of around 4 lt-day.
...
with the dark matter
made up of 0•3𝑀 compact bodies.
...
This provides a consistent explanation for the difference between the
Palomar-Green lack of correlation of amplitude with luminosity, and
the well-known anti-correlation seen in other samples
...
The unidentified population
of compact bodies detected by Alcock et al. (2000) were found to have
a characteristic mass of around 0•3𝑀 , which is the the same as the
mass used to account for the observed microlensing in galaxy halos
(Mediavilla et al. 2009; Pooley et al. 2012) and clusters (Hawkins
2020b). It is also close to the preferred mass of 0•7𝑀 from
theoretical studies of primordial black hole formation during the
QCD phase transition
-
Probing compact dark matter objects with microlensing
in gravitationally lensed quasars
https://www.aanda.org/articles/aa/pdf/2023/05/aa45615-22.pdf
Given our current sample, we show that the standard scenario cannot be rejected, in contrast with previous results by
Hawkins (2020a, A&A, 633, A107), claiming that a population of stellar mass primordial black holes (PBHs) is necessary to explain
the observed amplitude of the microlensing signal in lensed quasar light curves.
...
900 microlensing curves from the Rubin Observatory will be sufficient to discriminate between the two extreme scenarios at a 95%
confidence level.