  From new results presented in the literature we discuss the hypothesis that
the ultrafast periodic spectral modulations at $f_S \simeq 0.607$ THz found in
the spectra of $236$ stars of the Sloan Digital Sky Survey (SDSS) [1] were due
to oscillations induced by dark matter (DM) cores in their centers [2] behaving
as oscillating boson stars [3,4]. Two additional frequencies in the
redshift-corrected SDSS galactic spectra were found [5], $ f_{1,G} \simeq 9.5$
THz, the beating between $f_S$ and a spurious frequency, $f_{2,G} \simeq 8.9$
THz, introduced during the data analysis [6]. The indication that $f_S$ can be
real is its detection in a real solar spectrum but not in the Kurucz's
artificial solar spectrum [6,7,8]. Then, independent SETI observations of four
of these stars could not confirm with high confidence, but not completely
exclude, the presence of $f_S$ in their power spectra [9] while the radio SETI
deep-learning analysis with artificial intelligence confirmed indirectly $f_S$
detecting a narrowband Doppler drifting of radio signals in two of these stars
over a sample of $7$ with a high S/N [10]. Numerical simulations suggest that
the drifting can be due to frequency and phase modulation in time of the
observed frequencies at $1.3-1.7$ GHz with $f_S$. This would imply a DM upper
mass limit $m_a \lesssim 2.4 \times 10^{3}~ \mathrm{\mu eV}$ [2] which also
agrees with the results from the gamma ray burst GRB221009A [11,12,13], laser
interferometry [14], suggesting new physics for the muon g-2 anomaly [15].
