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Nota 1: Nesta página você encontra vários artigos científicos para download, sobre o tema "Planeta X".
O que dificulta um pouco o conhecimento sobre o tema é o fato da linguagem não ser tão simples, além de estar em inglês, pois é a "linguagem padrão" (se assim posso dizer) do meio acadêmico/científico relacionado a comunidade astronômica. Deixei de disponibilizar alguns artigos que havia encontrado, pois estavam restritos a páginas de associados, ou exigia pagamento (para ter direito ao conhecimento do assunto, seria necessário pagar, uma lástima!).
A parte mais interessante do Artigo (para quem não quiser lê-lo inteiro) é a Discussão/Conclusão.
Obs. Caso queira observar os títulos dos artigos abaixo em Português, clique aqui para ver a tradução com o google translator.
Artigos para Download
Constraints on the location of a putative distant massive body in the Solar System from recent planetary dataCornell University Library - 13/01/2011
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Cornell University Library - 13/09/2011
Young Solar System’s Fifth Giant Planet?
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Searching the WISE preliminary catalog for massive planets in the Oort cloudCópia dos slides de uma pesquisa apresentado no site da Universidade de Louisiana. 07/10/2011
http://www.ucs.louisiana.edu/~jjm9638/Nantes.pdf
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The perihelion precession of Saturn, planet X/Nemesis and MONDCornell University Library - 27/07/2009
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Constraints on planet X/Nemesis from Solar System’s inner dynamicsCornell University Library - 09/04/2009
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Tycho Brahe's 1572 supernova as a standard type Ia explosion revealed from its light echo spectrumCornell University Library - 28/10/2008
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The CORALIE survey for southern extra-solar planets X. A Hot Jupiter orbiting HD73256Astronomy & Astrophysics manuscript no. ms3857. Fevereiro 2008.
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The Physical Properties of HD 3651B: An Extrasolar Nemesis?The Astrophisycal Jornal - 06/09/2006
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A theoretical look at the direct detection of giant planets outside the Solar SystemCornell University Library - 22/01/2005
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Astrometric Microlensing Constraints on a Massive Body in the Outer Solar System with GaiaCornell University Library - 17/06/2005
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Mass limit on NemesisBull. Astr. Soc. India 33, 27-33, 2005.
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Supportive Evidence for a Brown Dwarf Solar CompanionPlanetary Systems in the Universe, Proceedings of IAU Symposium #202, held 7-11 August 2000 at Manchester, United Kingdom. Edited by A. Penny, p.214. 2004.
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Measurement of the lunar impact record for the past 3.5 b.y. and implications for the Nemesis theoryGeological Society of America Special Paper 356. 2002.
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Do mirror planets exist in our solar system?Cornell University Library - 15/04/2001
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Arguments for the presence of a distant large undiscovered Solar system planetMon. Not. R. Astron. Soc. 309, 31±34. 1999.
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Cometary Evidence of a Massive Body in the Outer Oort CloudsIcarus, Volume 141, Issue Icarus, pp. 354-366. Outubro/1999
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A Jupiter-mass companion to a solar-type starGeneva Observatory, 51 Chemin des Maillettes, CH·1290 Sauverny, NATURE· VOL 378, Switzerland, Novembro/1995.
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The X-Ray View of the Low-Mass Stars in the Solar NeighborhoodAstrophysical Journal v.450, p.392. Setembro/1995.
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Solar-system dynamics and planet XThe Observatory, Vol. 112, p. 36-40. Abril/1992.
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A theoretical dynamical limit of planet X's mass based on its perturbations on Uranus and NeptuneAstronomy and Astrophysics (ISSN 0004-6361), vol. 265, no. 1, p. 324-327. Novembro/1992.
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Mass and orbit estimation of Planet X via a family of cometsEarth, Moon, and Planets (ISSN 0167-9295), vol. 54, p. 193-202. Setembro/1991.
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The location of Planet XAstronomical Journal (ISSN 0004-6256), vol. 96, p. 1476-1478, Outubro/1988.
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Planet X and the stability of resonances in the Neptune-Pluto system.Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 235, p. 593-601. Dezembro/1988.
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Planet X — The current statusVolume 43, Numbers 1-4, 55-68, DOI: 10.1007/BF01234554. 1987
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The passage of a 'Nemesis'-like object through the planetary systemAstronomical Journal (ISSN 0004-6256), vol. 90, p. 1876-1882. Setembro/1985
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The passage of a 'Nemesis'-like object through the planetary systemAstronomical Journal (ISSN 0004-6256), vol. 90, p. 1876-1882, Setembro/1985.
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Evidence for Nemesis: a solar companion starLawrence Berkeley Lab. Conference: Conference on the galaxy and the solar system, Tucson, AZ, USA. Janeiro/1985
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Photoelectric light curves of minor planets 599 Luisa and 128 Nemesis during the 1976 oppositionAstronomy and Astrophysics Supplement Series, vol. 30, p. 375-379. - Dezembro/1977
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Planet X-Lowell Observatory Observation CircularJournal of the Royal Astronomical Society of Canada, Vol. 24, p.282, Agosto/1930
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Oppositions-Ephemeriden für die Planeten (73) Klytia und (128) NemesisAstronomische Nachrichten, volume 125, p.169 - Agosto/1890
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Alguns artigos científicos para serem vistos online
22/09/2011 - Computer simulation shows Solar System once had an extra planethttp://phys.org/news/2011-09-simulation-solar-extra-planet.html
10/11/2011 - Giant planet ejected from the solar system
http://phys.org/news/2011-11-giant-planet-ejected-solar.html
13/02/2011 - Up telescope! Search begins for giant new planet
http://www.independent.co.uk/news/science/up-telescope-search-begins-for-giant-new-planet-2213119.html
11/11/2011 - Is it a star? Is it a planet? ISO may have discovered the true nature of brown dwarfs
http://sci.esa.int/science-e/www/object/index.cfm?fobjectid=28886
18/12/2009 - Mr Minister, will Planet X hit Earth?
http://www.indianexpress.com/news/mr-minister-will-planet-x-hit-earth/555768/
14/04/2003 - X-rays found from a lightweight brown dwarf
http://www.spaceflightnow.com/news/n0304/14browndwarf/
18/10/2002 - Does the Sun have a doomsday twin?
http://www.telegraph.co.uk/science/science-news/3300270/Does-the-Sun-have-a-doomsday-twin.html
08/01/2002 - Object near sunlike star caught on camera
http://edition.cnn.com/2002/TECH/space/01/07/brown.dwarf/index.html
23/05/2002 - Astronomers Find Jupiter-Like Weather On Brown Dwarfs
http://www.spacedaily.com/news/extrasolar-02l.html
2001 - Large Object Discovered Orbiting Sun
http://web.archive.org/web/20020212033620/http:/dsc.discovery.com/news/briefs/20010702/kuiper.html
15/10/1999 - The Sun's sister could be a brown dwarf
http://www.timeshighereducation.co.uk/story.asp?storyCode=148429§ioncode=26
28/04/1997 - A Faint and Lonely Brown Dwarf in the Solar Vicinity
http://www.eso.org/public/news/eso9709/
Obs. A ferramenta que auxiliou sobremaneira a busca de vários artigos foi o Google Acadêmico e uma boa parte pela pesquisa comum do Google.
Leitura Recomendada:
Cronologia de como Netuno e Plutão foram descobertos e começo da busca pelo "Planeta X"
Diversas matérias que saíram nos jornais sobre o Planeta X (Segundo Sol)
1 Comentário foi registrado nessa publicação
Fonte: http://dda.harvard.edu/meetings/2012/DDA2012Abstracts.pdf
10 de junho de 2012 19:1305 Planetary Formation Mt. Hood, 1:40PM - 4:20PM
05.01: Signatures Of A Putative Planetary Mass Solar Companion On The Orbital Distribution Of Tno's And Centaurs - Rodney S. Gomes1, J. S. Soares1
1Observatorio Nacional, Brazil.
Gomes et al. 2006 (Icarus 184, 589) show that a planetary mass solar companion (PMSC) can produce orbits in an inner Oort cloud that can account for Sedna's orbit. On the other hand, one should expect that this faraway planet would also produce some peculiar orbital distribution for distant TNO's and Centaurs. A pair of interesting orbits in this respect are those of 2006 SQ372 and 2000 OO67. These objects have very large semimajor axes and perihelion between Uranus and Neptune orbits. It has been claimed that a likely source for 2006 SQ372 is the Oort cloud. Yet a PMSC has an important effect on objects at inner Oort cloud distances, say between 300 AU and 2000 AU, to make their perihelion distances to continually oscillate with a large enough amplitude to account for objects both inside and outside Neptune's orbit. This
naturally produces an extra amount of TNO's with semimajor axes between 300 and 2000 AU and perihelion inside Neptune's orbit, like 2006 SQ372 and 2000 OO67. This signature should be found in present observations. To deal with this problem we construct a numerical simulator and apply it to populations of distant TNO's produced by numerical integration of planetesimals and planets according to the Nice model, either including or not a PMSC. With the results from the numerical simulator we compare the model with and without the PMSC with observations.
We conclude that a PMSC is compatible with the existence of 2006 SQ372 and 2000 OO67 and, in fact, although not conclusively, we can also claim that the observations of 2006 SQ372 and 2000 OO67, compared to all other scattered objects, would be lucky events if no PMSC exists.