Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new cold sub-Saturnian candidate planet orbiting GJ 221   We re-analyse the recently published HARPS and PFS velocities of the nearby K
dwarf GJ 221 that have been reported to contain the signatures of two planets
orbiting the star. Our goal is to see whether the earlier studies discussing
the system fell victims of false negative detections. We perform the analyses
by using an independent statistical method based on posterior samplings and
model comparisons in the Bayesian framework that is known to be more sensitive
to weak signals of low-mass planets. According to our analyses, we find strong
evidence in favour of a third candidate planet in the system corresponding to a
cold sub-Saturnian planet with an orbital period of 500 days and a minimum mass
of 29 $M_{\oplus}$. Application of sub-optimal signal detection methods can
leave low-amplitude signals undetected in radial velocity time-series. Our
results suggest that the estimated statistical properties of low-mass planets
can thus be biased because several signals corresponding to low-mass candidate
planets may have gone unnoticed. This also suggests that the occurrence rates
of such planets based on radial velocity surveys might be underestimated.

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The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org