James E. Larkin

James E. Larkin
OccupationsAstrophysicist and academic
Academic background
EducationB.S., Physics and Mathematics
M.S., Physics
Ph.D., Physics
Alma materCalifornia State University, East Bay
California Institute of Technology
Academic work
InstitutionsUniversity of California, Los Angeles

James E. Larkin is an American astrophysicist and an academic. He is a professor of physics and astronomy at University of California, Los Angeles (UCLA). Larkin's research interests include extragalactic astrophysics, adaptive optics (AO), and infrared instrumentalization. He has been a recipient of the Alfred P. Sloan research fellowship. According to Scopus, his research has been cited 9,922 times.

Education

Larkin received a B.S. in Physics and Mathematics from California State University, East Bay (formerly known as California State University at Hayward) in 1990. In 1992, he completed his M.S. in Physics from California Institute of Technology and in 1996, earned a Ph.D. in Physics from the same institute. Between 1995 and 1997, he was a McCormick postdoctoral fellow at the University of Chicago.[1]

Career

Larkin joined UCLA in 1997 as professor at the department of Physics and Astronomy.[2] As a principal investigator and co-investigator for projects, he has worked on projects related to imaging devices for astrophysics, including the NIRC2, OSIRIS for the Keck Observatory, the Gemini Planet Imager for the Gemini International Telescopes,[1] and IRIS for the Thirty Meter Telescope.[3] As member of the UCLA Infrared Lab since 1997, he has contributed towards the development and design of diffraction-limited and infrared imaging devices for astrophysics, including OSIRIS.[4]

Research

Larkin's research has focused on developing instruments and methods for high-contrast astronomical imaging and extragalactic astronomy. Alongside colleagues, he introduced the Karhunen–Loève Image Projection (KLIP) algorithm, which was designed to reveal faint exoplanets hidden by their host star's light.[5] As part of the research team that developed the Gemini Planet Imager (GPI), he led the development of the integral field spectrograph.[6] The GPI was subsequently used to detect a young Jovian planet, named 51 Eri b.[7]

Larkin led the team that designed and developed OSIRIS, an integral field spectrograph with a spectral resolution of 3800, which achieved a relatively large field of view by the use of a Rockwell Hawaii-2 detector and packing the spectra closely together.[8] Using OSIRIS integral field spectroscopy, he collaboratively made observations of the kinematic structure of z ~ 2-3 galaxies which provided data on star formation activities at these epochs.[9]

In collaboration with Andrea Ghez for research relating to supermassive black holes, he investigated star clusters using the Keck II telescope.[10] As of 2025, as per Scopus, his work has received 9,922 citations.[11]

Awards and honors

  • 1993 – John Stemple Award, California Institute of Technology[12]
  • 1995 – Robert R. McCormick Postdoctoral fellowship, University of Chicago[13]
  • 2000 – Research fellowship, Alfred P. Sloan Foundation[14]

Selected articles

  • McLean, Ian S.; Becklin, Eric E.; Bendiksen, Oddvar; Brims, George; Canfield, John; Figer, Donald F.; Graham, James R.; Hare, Jonah; Lacayanga, Fred; Larkin, James E.; Larson, Samuel B.; Levenson, Nancy; Magnone, Nick; Teplitz, Harry; Wong, Woon (1998). "Design and development of NIRSPEC: A near-infrared echelle spectrograph for the Keck II telescope". In Fowler, Albert M. (ed.). Infrared Astronomical Instrumentation. Proceedings of SPIE. Vol. 3354. pp. 566–578. Bibcode:1998SPIE.3354..566M. doi:10.1117/12.317283. ISSN 0277-786X.
  • Ghez, A. M.; Duchêne, G.; Matthews, K.; Hornstein, S. D.; Tanner, A.; Larkin, J.; Morris, M.; Becklin, E. E.; Salim, S.; Kremenek, T.; Thompson, D.; Soifer, B. T.; Neugebauer, G.; McLean, I. (2003). "The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy's Central Black Hole: A Paradox of Youth". The Astrophysical Journal. 586 (2): L127 – L131. arXiv:astro-ph/0302299. Bibcode:2003ApJ...586L.127G. doi:10.1086/374804. ISSN 0004-637X.
  • Soummer, Rémi; Pueyo, Laurent; Larkin, James (2012). "Detection and Characterization of Exoplanets and Disks Using Projections on Karhunen-Loève Eigenimages". The Astrophysical Journal. 755 (2): L28. arXiv:1207.4197. Bibcode:2012ApJ...755L..28S. doi:10.1088/2041-8205/755/2/L28. ISSN 0004-637X.
  • Macintosh, Bruce; Graham, James R.; Ingraham, Patrick; Konopacky, Quinn; Marois, Christian; Perrin, Marshall; Poyneer, Lisa; Bauman, Brian; Barman, Travis; Burrows, Adam S.; Cardwell, Andrew; Chilcote, Jeffrey; De Rosa, Robert J.; Dillon, Daren; Doyon, Rene; Dunn, Jennifer; Erikson, Darren; Fitzgerald, Michael P.; Gavel, Donald; Goodsell, Stephen; Hartung, Markus; Hibon, Pascale; Kalas, Paul; Larkin, James; Maire, Jerome; Marchis, Franck; Marley, Mark S.; McBride, James; Millar-Blanchaer, Max; Morzinski, Katie; Norton, Andrew; Oppenheimer, B. R.; Palmer, David; Patience, Jennifer; Pueyo, Laurent; Rantakyro, Fredrik; Sadakuni, Naru; Saddlemyer, Leslie; Savransky, Dmitry; Serio, Andrew; Soummer, Remi; Sivaramakrishnan, Anand; Song, Inseok; Thomas, Sandrine; Wallace, J. Kent; Wiktorowicz, Sloane; Wolff, Schuyler (2014). "First light of the Gemini Planet Imager". Proceedings of the National Academy of Sciences. 111 (35): 12661–12666. arXiv:1403.7520. Bibcode:2014PNAS..11112661M. doi:10.1073/pnas.1304215111. PMID 24821792.
  • Macintosh, B.; Graham, J. R.; Barman, T.; De Rosa, R. J.; Konopacky, Q.; Marley, M. S.; Marois, C.; Nielsen, E. L.; Pueyo, L.; Rajan, A.; Rameau, J.; Saumon, D.; Wang, J. J.; Patience, J.; Ammons, M.; Arriaga, P.; Artigau, E.; Beckwith, S.; Brewster, J.; Bruzzone, S.; Bulger, J.; Burningham, B.; Burrows, A. S.; Chen, C.; Chiang, E.; Chilcote, J. K.; Dawson, R. I.; Dong, R.; Doyon, R.; Draper, Z. H.; Duchêne, G.; Esposito, T. M.; Fabrycky, D.; Fitzgerald, M. P.; Follette, K. B.; Fortney, J. J.; Gerard, B.; Goodsell, S.; Greenbaum, A. Z.; Hibon, P.; Hinkley, S.; Cotten, T. H.; Hung, L.-W.; Ingraham, P.; Johnson-Groh, M.; Kalas, P.; Lafreniere, D.; Larkin, J. E.; Lee, J.; Line, M.; Long, D.; Maire, J.; Marchis, F.; Matthews, B. C.; Max, C. E.; Metchev, S.; Millar-Blanchaer, M. A.; Mittal, T.; Morley, C. V.; Morzinski, K. M.; Murray-Clay, R.; Oppenheimer, R.; Palmer, D. W.; Patel, R.; Perrin, M. D.; Poyneer, L. A.; Rafikov, R. R.; Rantakyrö, F. T.; Rice, E. L.; Rojo, P.; Rudy, A. R.; Ruffio, J.-B.; Ruiz, M. T.; Sadakuni, N.; Saddlemyer, L.; Salama, M.; Savransky, D.; Schneider, A. C.; Sivaramakrishnan, A.; Song, I.; Soummer, R.; Thomas, S.; Vasisht, G.; Wallace, J. K.; Ward-Duong, K.; Wiktorowicz, S. J.; Wolff, S. G.; Zuckerman, B. (2015). "Discovery and spectroscopy of the young jovian planet 51 Eri b with the Gemini Planet Imager". Science. 350 (6256): 64–67. arXiv:1508.03084. Bibcode:2015Sci...350...64M. doi:10.1126/science.aac5891. PMID 26272904.

References

  1. ^ a b "James' Homepage". UCLA. Retrieved May 30, 2025.
  2. ^ "Members". UCLA Galactic Center Group. Retrieved June 27, 2025.
  3. ^ "Infrared Imaging Spectrograph (IRIS)". TMT International Observatory. Retrieved May 30, 2025.
  4. ^ "UCLA Infrared Lab". UCLA IR Lab. Retrieved May 30, 2025.
  5. ^ Maria Strampelli, Giovanni (2021). Discovery and Characterization of Substellar Companions in Stellar Clusters Using Karhunen-Loève Image Processing of HST Data. p. 44.
  6. ^ "Gemini Planet Imager First Light!". Gemini Observatory.
  7. ^ Chilcote, Jeffrey K.; Konopacky, Quinn M.; De Rosa, Robert J.; Hamper, Randall; Macintosh, Bruce A.; Marois, Christian; Perrin, Marshall D.; Savransky, Dmitry; Soummer, Rémi; Véran, Jean-Pierre; Agapito, Guido; Aleman, Arlene; Ammons, Mark; Bonaglia, Marco; Boucher, Marc-Andre; Curliss, Maeve; Dunn, Jennifer; Esposito, Simone; Filion, Guillaume; Fitzsimmons, Joeleff; Kain, Isabel; Kerley, Dan; Landry, Jean-Thomas; Lardiere, Olivier; Lemoine-Busserolle, Marie; Li, Duan; Limbach, Mary Anne; Madurowicz, Alex; Maire, Jerome; N'Diaye, Mamadou; Nielsen, Eric; Poyneer, Lisa; Pueyo, Laurent; Summey, Kaitlyn; Thomas, Coleman (13 December 2020). "GPI 2.0: Upgrading the Gemini Planet Imager". In Evans, Christopher J.; Bryant, Julia J.; Motohara, Kentaro (eds.). Ground-based and Airborne Instrumentation for Astronomy VIII. Proceedings of SPIE. p. 333. doi:10.1117/12.2562578. ISBN 978-1-5106-3681-1.
  8. ^ Kulkarni, S. R. (2016). "Instruments on large optical telescopes -- A case study". arXiv:1606.06674 [astro-ph.IM].
  9. ^ Jones, T. A.; Swinbank, A. M.; Ellis, R. S.; Richard, J.; Stark, D. P. (March 2010). "Resolved spectroscopy of gravitationally lensed galaxies: recovering coherent velocity fields in subluminous z ∼ 2-3 galaxies". Monthly Notices of the Royal Astronomical Society. 404 (3): 1247. arXiv:0910.4488. Bibcode:2010MNRAS.404.1247J. doi:10.1111/j.1365-2966.2010.16378.x.
  10. ^ "Einstein was right about relativity, UCLA says — for now". University of California. July 29, 2019. Retrieved May 20, 2025.
  11. ^ "Larkin, James E." Scopus. Retrieved June 27, 2025.
  12. ^ "John S. Stemple Memorial Prize WInners". Caltech. Retrieved May 30, 2025.
  13. ^ "Members". UCLA Galactic Center Group. Retrieved May 30, 2025.
  14. ^ "Annual report" (PDF). Sloan Foundation. Retrieved May 30, 2025.
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