Benedict, G. Fritz, et al. (1999). «Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions». The Astronomical Journal118 (2): 1086–1100. Bibcode:1999astro.ph..5318B. arXiv:astro-ph/9905318. doi:10.1086/300975.
Benedict; G. Fritz; et al. (1998). «Photometry of Proxima Centauri and Barnard's Star Using Hubbleteleskopet Fine Guidance Sensor 3: A Search for Periodic Variations». The Astronomical Journal116 (1): 429–439. Bibcode:1998AJ....116..429B. arXiv:astro-ph/9806276. doi:10.1086/300420.
Dunkley, J.; et al. (2009). «Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results». The Astrophysical Journal Supplement Series180 (2): 306–329. Bibcode:2009ApJS..180..306D. arXiv:0803.0586. doi:10.1088/0067-0049/180/2/306.
Kürster, M.; et al. (1999). «Precise radial velocities of Proxima Centauri. Strong constraints on a substellar companion». Astronomy & Astrophysics Letters344: L5–L8. Bibcode:1999A&A...344L...5K. arXiv:astro-ph/9903010.
García-Sánchez, J.; Weissman, P. R.; Preston, R. A.; Jones, D. L.; Lestrade, J.-F.; Latham, D. W.; Stefanik, R. P.; Paredes, J. M. (2001). «Stellar encounters with the solar system». Astronomy and Astrophysics379 (2): 634–659. Bibcode:2001A&A...379..634G. doi:10.1051/0004-6361:20011330.
Benedict, G. Fritz, et al. (1999). «Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions». The Astronomical Journal118 (2): 1086–1100. Bibcode:1999astro.ph..5318B. arXiv:astro-ph/9905318. doi:10.1086/300975.
Benedict; G. Fritz; et al. (1998). «Photometry of Proxima Centauri and Barnard's Star Using Hubbleteleskopet Fine Guidance Sensor 3: A Search for Periodic Variations». The Astronomical Journal116 (1): 429–439. Bibcode:1998AJ....116..429B. arXiv:astro-ph/9806276. doi:10.1086/300420.
Christian, D. J.; Mathioudakis, M.; Bloomfield, D. S.; Dupuis, J.; Keenan, F. P. (2004). «A Detailed Study of Opacity in the Upper Atmosphere of Proxima Centauri». The Astrophysical Journal612 (2): 1140–1146. Bibcode:2004ApJ...612.1140C. doi:10.1086/422803.
Dunkley, J.; et al. (2009). «Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results». The Astrophysical Journal Supplement Series180 (2): 306–329. Bibcode:2009ApJS..180..306D. arXiv:0803.0586. doi:10.1088/0067-0049/180/2/306.
Schroeder, Daniel J.; Golimowski, David A.; Brukardt, Ryan A.; Burrows, Christopher J.; Caldwell, John J.; Fastie, William G.; Ford, Holland C.; Hesman, Brigette; et al. (2000). «A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2». The Astronomical Journal119 (2): 906–922. Bibcode:2000AJ....119..906S. doi:10.1086/301227.
García-Sánchez, J.; Weissman, P. R.; Preston, R. A.; Jones, D. L.; Lestrade, J.-F.; Latham, D. W.; Stefanik, R. P.; Paredes, J. M. (2001). «Stellar encounters with the solar system». Astronomy and Astrophysics379 (2): 634–659. Bibcode:2001A&A...379..634G. doi:10.1051/0004-6361:20011330.
Benedict, G. Fritz, et al. (1999). «Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions». The Astronomical Journal118 (2): 1086–1100. Bibcode:1999astro.ph..5318B. arXiv:astro-ph/9905318. doi:10.1086/300975.
See Table 1, Doyle, J. G.; Butler, C. J. (1990). «Optical and infrared photometry of dwarf M and K stars». Astronomy and Astrophysics235: 335–339. Bibcode:1990A&A...235..335D. and p. 57, Peebles, P. J. E. (1993). Principles of Physical Cosmology. Princeton, New Jersey: Princeton University Press. ISBN0-691-01933-9.
Benedict; G. Fritz; et al. (1998). «Photometry of Proxima Centauri and Barnard's Star Using Hubbleteleskopet Fine Guidance Sensor 3: A Search for Periodic Variations». The Astronomical Journal116 (1): 429–439. Bibcode:1998AJ....116..429B. arXiv:astro-ph/9806276. doi:10.1086/300420.
Christian, D. J.; Mathioudakis, M.; Bloomfield, D. S.; Dupuis, J.; Keenan, F. P. (2004). «A Detailed Study of Opacity in the Upper Atmosphere of Proxima Centauri». The Astrophysical Journal612 (2): 1140–1146. Bibcode:2004ApJ...612.1140C. doi:10.1086/422803.
Dunkley, J.; et al. (2009). «Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results». The Astrophysical Journal Supplement Series180 (2): 306–329. Bibcode:2009ApJS..180..306D. arXiv:0803.0586. doi:10.1088/0067-0049/180/2/306.
Kürster, M.; et al. (1999). «Precise radial velocities of Proxima Centauri. Strong constraints on a substellar companion». Astronomy & Astrophysics Letters344: L5–L8. Bibcode:1999A&A...344L...5K. arXiv:astro-ph/9903010.
Schroeder, Daniel J.; Golimowski, David A.; Brukardt, Ryan A.; Burrows, Christopher J.; Caldwell, John J.; Fastie, William G.; Ford, Holland C.; Hesman, Brigette; et al. (2000). «A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2». The Astronomical Journal119 (2): 906–922. Bibcode:2000AJ....119..906S. doi:10.1086/301227.