Tim Milbourne

Graduate Student

Ph.D. Physics, Harvard University, 2014-Present
B.S. Physics, College of William and Mary, 2014

Tim’s research focuses on detecting exoplanets and developing models of stellar activity to help distinguish planetary signals from the host stars. Specifically, he uses the Sun as a test case to build better models of stellar activity, which will later be applied to non-solar targets.

tmilbourne@g.harvard.edu

Estimating Magnetic Filling Factors from Simultaneous Spectroscopy and Photometry: Disentangling Spots, Plage, and Network. T. W. Milbourne, D. F. Phillips, N. Langellier, A. Mortier, R. D. Haywood, S. H. Saar, H. M. Cegla, A. Collier Cameron, X. Dumusque, D. W. Latham, L. Malavolta, J. Maldonado, S. Thompson, A. Vanderburg, C. A. Watson, L. A. Buchhave, M. Cecconi, R. Cosentino, A. Ghedina, M. Gonzalez, M. Lodi, M. López-Morales, A. Sozzetti, and R. L. Walsworth. The Astrophysical Journal 920, 21 (2021). link PDF
BibTeX
@article{Milbourne2021, sort_date = {2021-10}, sort_date_type = {journal-issue}, doi = {10.3847/1538-4357/ac1266}, url_link = {https://doi.org/10.3847/1538-4357/ac1266}, url_pdf = {/files/2020/08/2021_Milbourne_ApJ.pdf}, year = {2021}, month = {Oct}, comment = {10}, publisher = {American Astronomical Society}, volume = {920}, number = {1}, pages = {21}, author = {T. W. Milbourne and D. F. Phillips and N. Langellier and A. Mortier and R. D. Haywood and S. H. Saar and H. M. Cegla and A. Collier Cameron and X. Dumusque and D. W. Latham and L. Malavolta and J. Maldonado and S. Thompson and A. Vanderburg and C. A. Watson and L. A. Buchhave and M. Cecconi and R. Cosentino and A. Ghedina and M. Gonzalez and M. Lodi and M. L{\'{o}}pez-Morales and A. Sozzetti and R. L. Walsworth}, title = {Estimating Magnetic Filling Factors from Simultaneous Spectroscopy and Photometry: Disentangling Spots, Plage, and Network}, journal = {The Astrophysical Journal}, keywords = {astro}, eprint = {2105.09113}, archiveprefix = {arXiv} }

arXiv
Detection Limits of Low-mass, Long-period Exoplanets Using Gaussian Processes Applied to HARPS-N Solar Radial Velocities. N. Langellier, T. W. Milbourne, D. F. Phillips, R. D. Haywood, S. H. Saar, A. Mortier, L. Malavolta, S. Thompson, A. Collier Cameron, X. Dumusque, H. M. Cegla, D. W. Latham, J. Maldonado, C. A. Watson, N. Buchschacher, M. Cecconi, D. Charbonneau, R. Cosentino, A. Ghedina, M. Gonzalez, C-H. Li, M. Lodi, M. López-Morales, G. Micela, E. Molinari, F. Pepe, E. Poretti, K. Rice, D. Sasselov, A. Sozzetti, S. Udry, and R. L. Walsworth. The Astronomical Journal 161, 287 (2021). link PDF
BibTeX
@article{Langellier2021, sort_date = {2021-06}, sort_date_type = {journal-issue}, doi = {10.3847/1538-3881/abf1e0}, year = {2021}, month = {may}, comment = {05}, publisher = {American Astronomical Society}, volume = {161}, number = {6}, pages = {287}, author = {N. Langellier and T. W. Milbourne and D. F. Phillips and R. D. Haywood and S. H. Saar and A. Mortier and L. Malavolta and S. Thompson and A. Collier Cameron and X. Dumusque and H. M. Cegla and D. W. Latham and J. Maldonado and C. A. Watson and N. Buchschacher and M. Cecconi and D. Charbonneau and R. Cosentino and A. Ghedina and M. Gonzalez and C-H. Li and M. Lodi and M. L{\'{o}}pez-Morales and G. Micela and E. Molinari and F. Pepe and E. Poretti and K. Rice and D. Sasselov and A. Sozzetti and S. Udry and R. L. Walsworth}, title = {Detection Limits of Low-mass, Long-period Exoplanets Using Gaussian Processes Applied to {HARPS}-N Solar Radial Velocities}, journal = {The Astronomical Journal}, url_pdf = {/files/2020/08/2021_Langellier_AJ.pdf}, url_link = {https://doi.org/10.3847/1538-3881/abf1e0}, keywords = {astro}, eprint = {2008.05970}, archiveprefix = {arXiv} }

arXiv

The spectral impact of magnetic activity on disc-integrated HARPS-N solar observations: exploring new activity indicators. A. P. G. Thompson, C. A. Watson, R. D. Haywood, J. C. Costes, E. de Mooij, A. Collier Cameron, X. Dumusque, D. F. Phillips, S. H. Saar, A. Mortier, T. W. Milbourne, S. Aigrain, H. M. Cegla, D. Charbonneau, R. Cosentino, A. Ghedina, D. W. Latham, M. López-Morales, G. Micela, E. Molinari, E. Poretti, A. Sozzetti, S. Thompson, and R. Walsworth. Monthly Notices of the Royal Astronomical Society 494, 4279–4290 (2020). link PDF
BibTeX
@article{Thompson2020, eprint = {2004.09830}, archiveprefix = {arXiv}, sort_date = {2020-05-21}, sort_date_type = {journal-issue}, author = {Thompson, A. P. G. and Watson, C. A. and Haywood, R. D. and Costes, J. C. and de Mooij, E. and Collier Cameron, A. and Dumusque, X. and Phillips, D. F. and Saar, S. H. and Mortier, A. and Milbourne, T. W. and Aigrain, S. and Cegla, H. M. and Charbonneau, D. and Cosentino, R. and Ghedina, A. and Latham, D. W. and L\'{o}pez-Morales, M. and Micela, G. and Molinari, E. and Poretti, E. and Sozzetti, A. and Thompson, S. and Walsworth, R.}, title = {The spectral impact of magnetic activity on disc-integrated {HARPS}-{N} solar observations: exploring new activity indicators}, journal = {Monthly Notices of the Royal Astronomical Society}, year = {2020}, volume = {494}, number = {3}, pages = {4279--4290}, month = {may}, comment = {05}, doi = {10.1093/mnras/staa1010}, keywords = {astro}, url_link = {https://academic.oup.com/mnras/article/494/3/4279/5824655}, url_pdf = {/files/2020/08/2020_Thompson_MNRAS.pdf} }

arXiv
Testing the Spectroscopic Extraction of Suppression of Convective Blueshift. M. Miklos, T. W. Milbourne, R. D. Haywood, D. F. Phillips, S. H. Saar, N. Meunier, H. M. Cegla, X. Dumusque, N. Langellier, J. Maldonado, L. Malavolta, A. Mortier, S. Thompson, C. A. Watson, M. Cecconi, R. Cosentino, A. Ghedina, C.H. Li, M. López-Morales, E. Molinari, Ennio Poretti, D. Sasselov, A. Sozzetti, and R. L. Walsworth. The Astrophysical Journal 888, 117 (2020). link PDF
BibTeX
@article{Miklos2020, eprint = {1910.09038}, archiveprefix = {arXiv}, sort_date = {2020-01-10}, sort_date_type = {journal-issue}, author = {Miklos, M. and Milbourne, T. W. and Haywood, R. D. and Phillips, D. F. and Saar, S. H. and Meunier, N. and Cegla, H. M. and Dumusque, X. and Langellier, N. and Maldonado, J. and Malavolta, L. and Mortier, A. and Thompson, S. and Watson, C. A. and Cecconi, M. and Cosentino, R. and Ghedina, A. and Li, C.H. and L\'{o}pez-Morales, M. and Molinari, E. and Poretti, Ennio and Sasselov, D. and Sozzetti, A. and Walsworth, R. L.}, title = {Testing the {Spectroscopic} {Extraction} of {Suppression} of {Convective} {Blueshift}}, journal = {The Astrophysical Journal}, year = {2020}, volume = {888}, number = {2}, pages = {117}, month = {jan}, comment = {01}, doi = {10.3847/1538-4357/ab59d5}, keywords = {astro}, url_link = {https://doi.org/10.3847%2F1538-4357%2Fab59d5}, url_pdf = {/files/2020/08/2020_Miklos_ApJ.pdf} }

arXiv

Sensitivity of low-degree solar p modes to active and ephemeral regions: frequency shifts back to the Maunder minimum. William J. Chaplin, Rachel Howe, Sarbani Basu, Yvonne Elsworth, Timothy W. Milbourne, Raphaëlle D. Haywood, Guy R. Davies, Steven J. Hale, Andrea Miglio, and Eddie Ross. Monthly Notices of the Royal Astronomical Society: Letters 489, L86–L90 (2019). link PDF
BibTeX
@article{Chaplin2019, eprint = {1908.08755}, archiveprefix = {arXiv}, sort_date = {2019-10-11}, sort_date_type = {journal-issue}, author = {Chaplin, William J. and Howe, Rachel and Basu, Sarbani and Elsworth, Yvonne and Milbourne, Timothy W. and Haywood, Rapha\"{e}lle D. and Davies, Guy R. and Hale, Steven J. and Miglio, Andrea and Ross, Eddie}, title = {Sensitivity of low-degree solar p modes to active and ephemeral regions: frequency shifts back to the {Maunder} minimum}, journal = {Monthly Notices of the Royal Astronomical Society: Letters}, year = {2019}, volume = {489}, number = {1}, pages = {L86--L90}, month = {oct}, comment = {10}, doi = {10.1093/mnrasl/slz132}, keywords = {astro}, url_link = {https://academic.oup.com/mnrasl/article/489/1/L86/5556555}, url_pdf = {/files/2020/08/2019_Chaplin_arXiv.pdf} }

arXiv
Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum. A. Collier Cameron, A. Mortier, D. Phillips, X. Dumusque, R. D. Haywood, N. Langellier, C. A. Watson, H. M. Cegla, J. Costes, D. Charbonneau, A. Coffinet, D. W. Latham, M. López-Morales, L. Malavolta, J. Maldonado, G. Micela, T. Milbourne, E. Molinari, S. H. Saar, S. Thompson, N. Buchschacher, M. Cecconi, R. Cosentino, A. Ghedina, A. Glenday, M. Gonzalez, C.-H. Li, M. Lodi, C. Lovis, F. Pepe, E. Poretti, K. Rice, D. Sasselov, A. Sozzetti, A. Szentgyorgyi, S. Udry, and R. Walsworth. Monthly Notices of the Royal Astronomical Society 487, 1082–1100 (2019). link PDF
BibTeX
@article{CollierCameron2019, eprint = {1904.12186}, archiveprefix = {arXiv}, sort_date = {2019-07-21}, sort_date_type = {journal-issue}, author = {Collier Cameron, A. and Mortier, A. and Phillips, D. and Dumusque, X. and Haywood, R. D. and Langellier, N. and Watson, C. A. and Cegla, H. M. and Costes, J. and Charbonneau, D. and Coffinet, A. and Latham, D. W. and L\'{o}pez-Morales, M. and Malavolta, L. and Maldonado, J. and Micela, G. and Milbourne, T. and Molinari, E. and Saar, S. H. and Thompson, S. and Buchschacher, N. and Cecconi, M. and Cosentino, R. and Ghedina, A. and Glenday, A. and Gonzalez, M. and Li, C.-H. and Lodi, M. and Lovis, C. and Pepe, F. and Poretti, E. and Rice, K. and Sasselov, D. and Sozzetti, A. and Szentgyorgyi, A. and Udry, S. and Walsworth, R.}, title = {Three years of {Sun}-as-a-star radial-velocity observations on the approach to solar minimum}, journal = {Monthly Notices of the Royal Astronomical Society}, year = {2019}, volume = {487}, number = {1}, pages = {1082--1100}, month = {jul}, comment = {07}, doi = {10.1093/mnras/stz1215}, keywords = {astro}, url_link = {https://academic.oup.com/mnras/article/487/1/1082/5485657}, url_pdf = {/files/2020/08/2019_ACC_MNRAS.pdf} }

arXiv
HARPS-N Solar RVs Are Dominated by Large, Bright Magnetic Regions. T. W. Milbourne, R. D. Haywood, D. F. Phillips, S. H. Saar, H. M. Cegla, A. C. Cameron, J. Costes, X. Dumusque, N. Langellier, D. W. Latham, J. Maldonado, L. Malavolta, A. Mortier, M. L. Palumbo III, S. Thompson, C. A. Watson, F. Bouchy, N. Buchschacher, M. Cecconi, D. Charbonneau, R. Cosentino, A. Ghedina, A. G. Glenday, M. Gonzalez, C.-H. Li, M. Lodi, M. López-Morales, C. Lovis, M. Mayor, G. Micela, E. Molinari, F. Pepe, G. Piotto, K. Rice, D. Sasselov, D. Ségransan, A. Sozzetti, A. Szentgyorgyi, S. Udry, and R. L. Walsworth. The Astrophysical Journal 874, 107 (2019). link PDF
BibTeX
@article{Milbourne2019, eprint = {1902.04184}, archiveprefix = {arXiv}, sort_date = {2019-03-20}, sort_date_type = {journal-issue}, author = {Milbourne, T. W. and Haywood, R. D. and Phillips, D. F. and Saar, S. H. and Cegla, H. M. and Cameron, A. C. and Costes, J. and Dumusque, X. and Langellier, N. and Latham, D. W. and Maldonado, J. and Malavolta, L. and Mortier, A. and III, M. L. Palumbo and Thompson, S. and Watson, C. A. and Bouchy, F. and Buchschacher, N. and Cecconi, M. and Charbonneau, D. and Cosentino, R. and Ghedina, A. and Glenday, A. G. and Gonzalez, M. and Li, C.-H. and Lodi, M. and L\'{o}pez-Morales, M. and Lovis, C. and Mayor, M. and Micela, G. and Molinari, E. and Pepe, F. and Piotto, G. and Rice, K. and Sasselov, D. and S\'{e}gransan, D. and Sozzetti, A. and Szentgyorgyi, A. and Udry, S. and Walsworth, R. L.}, title = {{HARPS}-{N} {Solar} {RVs} {Are} {Dominated} by {Large}, {Bright} {Magnetic} {Regions}}, journal = {The Astrophysical Journal}, year = {2019}, volume = {874}, number = {1}, pages = {107}, month = {mar}, comment = {03}, doi = {10.3847/1538-4357/ab064a}, keywords = {astro}, url_link = {https://doi.org/10.3847%2F1538-4357%2Fab064a}, url_pdf = {/files/2020/08/2019_Milbourne_ApJ.pdf} }

arXiv

A genetic strategy for probing the functional diversity of magnetosome formation. Lilah Rahn-Lee, Meghan E. Byrne, Manjing Zhang, David Le Sage, David R. Glenn, Timothy Milbourne, Ronald L. Walsworth, Hojatollah Vali, and Arash Komeili. PLoS genetics 11, e1004811 (2015). link PDF
BibTeX
@article{Rahn-Lee2015, sort_date = {2015-01-08}, sort_date_type = {journal-publication}, author = {Rahn-Lee, Lilah and Byrne, Meghan E. and Zhang, Manjing and Le Sage, David and Glenn, David R. and Milbourne, Timothy and Walsworth, Ronald L. and Vali, Hojatollah and Komeili, Arash}, title = {A genetic strategy for probing the functional diversity of magnetosome formation}, journal = {PLoS genetics}, year = {2015}, month = {1}, day = {8}, volume = {11}, number = {1}, pages = {e1004811}, doi = {10.1371/journal.pgen.1004811}, keywords = {bioimaging, quantum-sensing}, url_pdf = {/files/2020/08/2015_Rahn-Lee_PLOS.pdf}, url_link = {https://doi.org/10.1371/journal.pgen.1004811} }

Tim Milbourne

2021

2020

2019

2015