Kepler-1625b I

<h2 id="studies-and-observations">Studies and observations</h2>
<p>The original paper<a class="footnote-ref" id="fnref:4" href="#fn:4"><sup>4</sup></a> presented two independent lines of evidence for the exomoon, a <a href="/facts/Transit_timing_variation/yqK6GSYW">transit timing variation</a> indicating a Neptune-mass moon, and a photometric dip indicating a Neptune-radius moon. An independent re-analysis of the observations published in February 2019<a class="footnote-ref" id="fnref:5" href="#fn:5"><sup>5</sup></a> recovered both but suggested that an inclined and hidden hot-Jupiter could also be responsible, which could be tested with future <a href="/facts/Doppler_spectroscopy/0uTvj3pq">Doppler spectroscopy</a> radial velocity observations. A third study analyzing this data set recovered the transit timing variation signature but not the photometric dip, and thus questioned the exomoon hypothesis.<a class="footnote-ref" id="fnref:6" href="#fn:6"><sup>6</sup></a> The original discovery team later addressed this paper, finding that their re-reduction exhibits higher systematics that may explain their differing conclusions.<a class="footnote-ref" id="fnref:7" href="#fn:7"><sup>7</sup></a>
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<h2 id="see-also">See also</h2>

<ul><li><a href="/facts/Kepler-1708b/uk7zV04f">Kepler-1708b</a></li>
<li><a href="/facts/PDS_70/1AhrXflI">PDS 70</a></li>
<li><a href="/facts/2MASS_J11193254%25E2%2580%25931137466_AB/dyj7pmYn">2MASS J11193254–1137466 AB</a></li>
<li><a href="/facts/Subsatellite/31waKMUR">Subsatellite</a></li>
<li><a href="/facts/V1400_Centauri/1dL9uYfV">V1400 Centauri</a></li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1"><p>Teachey, A.; Kipping, D. M.; Schmitt, A. R. (26 July 2017). "HEK. VI. On the Dearth of Galilean Analogs in Kepler, and the Exomoon Candidate Kepler-1625b I". The Astronomical Journal. 155 (1) (published 22 December 2017): 36. arXiv:1707.08563. Bibcode:2018AJ....155...36T. doi:10.3847/1538-3881/aa93f2. S2CID 118911978. <a href="https://doi.org/10.3847%2F1538-3881%2Faa93f2" target="_blank">https://doi.org/10.3847%2F1538-3881%2Faa93f2</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li>
<li id="fn:2"><p>Kollmeier, Juna A.; Raymond, Sean N. (21 November 2018). "Can moons have moons?". Monthly Notices of the Royal Astronomical Society: Letters. 483: L80 – L84. arXiv:1810.03304. doi:10.1093/mnrasl/sly219. <a href="https://academic.oup.com/mnrasl/article/483/1/L80/5195537" target="_blank">https://academic.oup.com/mnrasl/article/483/1/L80/5195537</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></p></li>
<li id="fn:3"><p>Forgan, Duncan H. (11 February 2019). "The habitable zone for Earth-like exomoons orbiting Kepler-1625b". International Journal of Astrobiology. 18 (6): 510–517. arXiv:1810.02712. Bibcode:2019IJAsB..18..510F. doi:10.1017/s1473550418000514. ISSN 1473-5504. S2CID 118857039. <a href="https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/abs/habitable-zone-for-earthlike-exomoons-orbiting-kepler1625b/D8A5CEB8416914F2CD0D9B275F4E8FBB" target="_blank">https://www.cambridge.org/core/journals/international-journal-of-astrobiology/article/abs/habitable-zone-for-earthlike-exomoons-orbiting-kepler1625b/D8A5CEB8416914F2CD0D9B275F4E8FBB</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></p></li>
<li id="fn:4"><p>Teachey, Alex; et al. (2018). "Evidence for a large exomoon orbiting Kepler-1625b". Science Advances. 4 (10): eaav1784. arXiv:1810.02362. Bibcode:2018SciA....4.1784T. doi:10.1126/sciadv.aav1784. PMC 6170104. PMID 30306135. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170104" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6170104</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></p></li>
<li id="fn:5"><p>Heller, René; Rodenbeck, Kai; Giovanni, Bruno (17 April 2019). "An alternative interpretation of the exomoon candidate signal in the combined Kepler and Hubble data of Kepler-1625". Astronomy & Astrophysics. 624: 95. arXiv:1902.06018. Bibcode:2019A&A...624A..95H. doi:10.1051/0004-6361/201834913. S2CID 119311103. <a href="https://www.aanda.org/articles/aa/full_html/2019/04/aa34913-18/aa34913-18.html" target="_blank">https://www.aanda.org/articles/aa/full_html/2019/04/aa34913-18/aa34913-18.html</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></p></li>
<li id="fn:6"><p>Kreidberg, Laura; Luger, Rodrigo; Bedell, Megan (24 May 2019). "No Evidence for Lunar Transit in New Analysis of Hubble Space Telescope Observations of the Kepler-1625 System". The Astrophysical Journal. 877 (2): L15. arXiv:1904.10618. Bibcode:2019ApJ...877L..15K. doi:10.3847/2041-8213/ab20c8. S2CID 129945202. <a href="https://doi.org/10.3847%2F2041-8213%2Fab20c8" target="_blank">https://doi.org/10.3847%2F2041-8213%2Fab20c8</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></p></li>
<li id="fn:7"><p>Teachey, Alex; Kipping, David M.; Burke, Christopher (5 March 2020). "Loose Ends for the Exomoon Candidate Host Kepler-1625b". The Astronomical Journal. 159 (4): 142. arXiv:1904.11896. Bibcode:2020AJ....159..142T. doi:10.3847/1538-3881/ab7001. S2CID 135465103. <a href="https://doi.org/10.3847%2F1538-3881%2Fab7001" target="_blank">https://doi.org/10.3847%2F1538-3881%2Fab7001</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></p></li>
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Kepler-1625b I open-in-new

Kepler-1625b I