Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Searching for planetary signals in Doppler time series: a performance
  evaluation of tools for periodograms analysis   We carry out a comparative analysis of the performance of three algorithms
widely used to identify significant periodicities in radial-velocity (RV)
datasets: the Generalised Lomb-Scargle Periodogram (GLS), its modified version
based on Bayesian statistics (BGLS), and the multi-frequency periodogram scheme
called FREquency DEComposer (FREDEC). We apply the algorithms to a suite of
numerical simulations of (single and multiple) low-amplitude Keplerian RV
signals induced by low-mass companions around M-dwarf primaries. The global
performance of the three period search approaches is quite similar in the limit
of an idealized, best-case scenario (single planets, circular orbits, white
noise). However, GLS, BGLS and FREDEC are not equivalent when it comes to the
correct identification of more complex signals (including correlated noise of
stellar origin, eccentric orbits, multiple planets), with variable degrees of
efficiency loss as a function of system parameters and degradation in
completeness and reliability levels. The largest discrepancy is recorded in the
number of false detections: the standard approach of residual analyses adopted
for GLS and BGLS translates in large fractions of false alarms ($\sim30\%$) in
the case of multiple systems, as opposed to $\sim10\%$ for the FREDEC approach
of simultaneous multi-frequency search. Our results reinforce the need for the
strengthening and further development of the most aggressive and effective {\it
ab initio} strategies for the robust identification of low-amplitude planetary
signals in RV datasets, particularly now that RV surveys are beginning to
achieve sensitivity to potentially habitable Earth-mass planets around
late-type stars.

27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph