Stellar Activity Masquerading as Planets in the Habitable Zone of the M
dwarf Gliese 581
P. Robertson, S. Mahadevan, M. Endl, und A. Roy. (2014)cite arxiv:1407.1049Comment: This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science Express (3 July 2014), doi:10.1126/science.1253253.
DOI: 10.1126/science.1253253
Zusammenfassung
The M dwarf Gliese 581 is believed to host four planets, including one (GJ
581d) near the habitable zone that could possibly support liquid water on its
surface if it is a rocky planet. The detection of another habitable-zone
planet--GJ 581g--is disputed, as its significance depends on the eccentricity
assumed for d. Analyzing stellar activity using the H-alpha line, we measure a
stellar rotation period of 130+/-2 days and a correlation for H-alpha
modulation with radial velocity. Correcting for activity greatly diminishes the
signal of GJ 581d (to 1.5 sigma), while significantly boosting the signals of
the other known super-Earth planets. GJ 581d does not exist, but is an artifact
of stellar activity which, when incompletely corrected, causes the false
detection of planet g.
Beschreibung
Stellar Activity Masquerading as Planets in the Habitable Zone of the M
dwarf Gliese 581
cite arxiv:1407.1049Comment: This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science Express (3 July 2014), doi:10.1126/science.1253253
%0 Generic
%1 robertson2014stellar
%A Robertson, Paul
%A Mahadevan, Suvrath
%A Endl, Michael
%A Roy, Arpita
%D 2014
%K 2014 a:Mahadevan a:Robertson gl581 habitability planets
%R 10.1126/science.1253253
%T Stellar Activity Masquerading as Planets in the Habitable Zone of the M
dwarf Gliese 581
%U http://arxiv.org/abs/1407.1049
%X The M dwarf Gliese 581 is believed to host four planets, including one (GJ
581d) near the habitable zone that could possibly support liquid water on its
surface if it is a rocky planet. The detection of another habitable-zone
planet--GJ 581g--is disputed, as its significance depends on the eccentricity
assumed for d. Analyzing stellar activity using the H-alpha line, we measure a
stellar rotation period of 130+/-2 days and a correlation for H-alpha
modulation with radial velocity. Correcting for activity greatly diminishes the
signal of GJ 581d (to 1.5 sigma), while significantly boosting the signals of
the other known super-Earth planets. GJ 581d does not exist, but is an artifact
of stellar activity which, when incompletely corrected, causes the false
detection of planet g.
@misc{robertson2014stellar,
abstract = {The M dwarf Gliese 581 is believed to host four planets, including one (GJ
581d) near the habitable zone that could possibly support liquid water on its
surface if it is a rocky planet. The detection of another habitable-zone
planet--GJ 581g--is disputed, as its significance depends on the eccentricity
assumed for d. Analyzing stellar activity using the H-alpha line, we measure a
stellar rotation period of 130+/-2 days and a correlation for H-alpha
modulation with radial velocity. Correcting for activity greatly diminishes the
signal of GJ 581d (to 1.5 sigma), while significantly boosting the signals of
the other known super-Earth planets. GJ 581d does not exist, but is an artifact
of stellar activity which, when incompletely corrected, causes the false
detection of planet g.},
added-at = {2014-07-18T13:16:08.000+0200},
author = {Robertson, Paul and Mahadevan, Suvrath and Endl, Michael and Roy, Arpita},
biburl = {https://www.bibsonomy.org/bibtex/2e2ff52e11aee0afc0d1abb91b67d9f11/danielcarrera},
description = {Stellar Activity Masquerading as Planets in the Habitable Zone of the M
dwarf Gliese 581},
doi = {10.1126/science.1253253},
interhash = {8d9a65506f2dfd097593f72610e5b4af},
intrahash = {e2ff52e11aee0afc0d1abb91b67d9f11},
keywords = {2014 a:Mahadevan a:Robertson gl581 habitability planets},
note = {cite arxiv:1407.1049Comment: This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science Express (3 July 2014), doi:10.1126/science.1253253},
timestamp = {2014-07-18T13:16:08.000+0200},
title = {Stellar Activity Masquerading as Planets in the Habitable Zone of the M
dwarf Gliese 581},
url = {http://arxiv.org/abs/1407.1049},
year = 2014
}