Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Jon M. Jenkins is active.

Publication


Featured researches published by Jon M. Jenkins.


Nature | 2011

Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars

Timothy R. Bedding; Benoit Mosser; Daniel Huber; Josefina Montalban; P. G. Beck; Joergen Christensen-Dalsgaard; Yvonne P. Elsworth; Rafael Arenas Garcia; Andrea Miglio; D. Stello; T. R. White; Joris De Ridder; S. Hekker; Conny Aerts; C. Barban; K. Belkacem; Anne-Marie Broomhall; Timothy M. Brown; Derek L. Buzasi; Fabien Carrier; William J. Chaplin; Maria Pia di Mauro; Marc-Antoine Dupret; S. Frandsen; Ronald L. Gilliland; M. J. Goupil; Jon M. Jenkins; T. Kallinger; Steven D. Kawaler; Hans Kjeldsen

Red giants are evolved stars that have exhausted the supply of hydrogen in their cores and instead burn hydrogen in a surrounding shell. Once a red giant is sufficiently evolved, the helium in the core also undergoes fusion. Outstanding issues in our understanding of red giants include uncertainties in the amount of mass lost at the surface before helium ignition and the amount of internal mixing from rotation and other processes. Progress is hampered by our inability to distinguish between red giants burning helium in the core and those still only burning hydrogen in a shell. Asteroseismology offers a way forward, being a powerful tool for probing the internal structures of stars using their natural oscillation frequencies. Here we report observations of gravity-mode period spacings in red giants that permit a distinction between evolutionary stages to be made. We use high-precision photometry obtained by the Kepler spacecraft over more than a year to measure oscillations in several hundred red giants. We find many stars whose dipole modes show sequences with approximately regular period spacings. These stars fall into two clear groups, allowing us to distinguish unambiguously between hydrogen-shell-burning stars (period spacing mostly ∼50 seconds) and those that are also burning helium (period spacing ∼100 to 300 seconds).


Observatory Operations: Strategies, Processes, and Systems VII | 2018

The TESS science data archive

Daryl A. Swade; Jon M. Jenkins; David W. Latham; Edward H. Morgan; William Sparks; Roland Kraft Vanderspek; Scott W. Fleming; Susan E. Mullally

The Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey mission designed to discover exoplanets around the nearest and brightest stars. The Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute will serve as the archive for TESS science data. The services provided by MAST for the TESS mission are to store science data and provide an Archive User Interface for data documentation, search, and retrieval. The TESS mission takes advantage of MAST multi-mission architecture to provide a cost-effective archive that allows integration of TESS data with data from other missions.


Proceedings of the International Astronomical Union | 2012

Stellar Variability Observed with Kepler

Jon M. Jenkins; Ronald L. Gilliland; Soeren Meibom; Lucianne M. Walkowicz; William J. Borucki; Douglas A. Caldwell

The Kepler photometer was launched in March 2009 initiating NASA’s search for Earth-size planets orbiting in the habitable zone of their star. After three years of science operations, Kepler has proven to be a veritable cornucopia of science results, both for exoplanets and for astrophysics. The phenomenal photometric precision and continuous observations required in order to identify small, rocky transiting planets enables the study of a large range of phenomena contributing to stellar variability for many thousands of solar-like stars in Kepler’s field of view in exquisite detail. These effects range from <1 ppm acoustic oscillations on timescales from a few minutes and longward, to flares on timescales of hours, to spot-induced modulation on timescales of days to weeks to activity cycles on timescales of months to years. Recent improvements to the science pipeline have greatly enhanced Kepler’s ability to reject instrumental signatures while better preserving intrinsic stellar variability, opening up the timescales for study well beyond 10 days. We give an overview of the stellar variability we see across the full range of spectral types observed by Kepler, from the cool, small red M stars to the hot, large late A stars, both in terms of amplitude as well as timescale. We also present a picture of what the extended mission will likely bring to the field of stellar variability as we progress from a 3.5 year mission to a 7.5+ year mission.


Proceedings of the International Astronomical Union | 2012

The Kepler Completeness Study: A Pipeline Throughput Experiment

Jessie L. Christiansen; Bruce D. Clarke; Christopher J. Burke; Jon M. Jenkins

The Kepler Mission was designed to measure the frequency of Earth-like planets in the habitable zone of Sun-like stars. A requirement for determining the underlying planet population from a sample of detected planets is understanding the completeness of that sample—what fraction of the planets that could have been discovered in a given data set were actually detected. Here we describe an experiment designed to address a specific aspect of that question, which is the issue of signal throughput efficiency. We investigate the extent to which the Kepler pipeline preserves transit signals by injecting simulated transit signals into the pixel-level data, processing the modified pixels through the pipeline, and measuring their detection statistics. For the single channel that we examine initially, we inject simulated transit signal trains into the pixel time series of each of the 1801 targets for the 89 days that constitute Quarter 3. For the 1680 that behave as expected in the pipeline, on average we find the strength of the injected signal is recovered at 99.6% of the strength of the original signal. Finally we outline the further work required to characterise the completeness of the Kepler pipeline.


Symposium - International Astronomical Union | 2004

Transit Search for Exoplanets with the Vulcan Camera

Douglas A. Caldwell; W. J. Borucki; Jon M. Jenkins; David G. Koch; Larry Webster; Robert L. Showen

The NASA Ames Research Centers Vulcan photometer is being used in a search for close-in giant extrasolar planets. With our current data reduction system we achieve 0.2-0.8% hour-to-hour relative photometric precision on rv 6000 stars brighter than 13t h magnitude. Three Galactic-plane fields have so far yielded hundreds of variable stars, including rv 50 eclipsing or interacting binaries per field. Several candidate detections have been followed up with radial velocity observations. High-resolution spectroscopy revealed many of the strongest candidates to be grazing eclipsing binaries.


HASH(0x7f331a4e4550) | 2010

Hybrid γ Doradus-δ Scuti Pulsators: New Insights into the Physics of the Oscillations from Kepler Observations

V. Antoci; L. A. Balona; G. Catanzaro; J. Daszy; Joyce Ann Guzik; G. Handler; G. Houdek; D. W. Kurtz; M. Marconi; M. J. P. F. G. Monteiro; Andrés Moya; V. Ripepi; K. Uytterhoeven; William J. Borucki; Timothy M. Brown; J. Christensen-Dalsgaard; R. L. Gilliland; Jon M. Jenkins; Hans Kjeldsen; David G. Koch; Stefano Bernabei; P. A. Bradley; Michel Breger; M. Di; R. A. Garc; A. Garc; Jason Jackiewicz; A. Kaiser; H. Lehmann; R. Szab


Archive | 2006

The Kepler Mission: A Transit-Photometry Mission to Discover Terrestrial Planets

William J. Borucki; David G. Koch; Gibor Basri; Timothy M. Brown; Douglas A. Caldwell; Edna DeVore; Edward W. Dunham; Thomas N. Gautier; John C. Geary; Ronald L. Gilliland; Alan Gould; Steven B. Howell; Jon M. Jenkins


Archive | 2012

Planet Detection: The Kepler Mission

Jon M. Jenkins; Jeffrey C. Smith; Peter Tenenbaum; Joseph D. Twicken; Jeffrey Edward van Cleve


Archive | 2001

Expected results for the number extrasolar planets vs their size and semi-major axis from the Kepler Mission

William J. Borucki; David G. Koch; Jon M. Jenkins


Archive | 2010

High-Precision Imaging Photometers for the Transient Exoplanet Survey Satellite

Roland Kraft Vanderspek; George R. Ricker; David W. Latham; Kimberly A. Ennico; G. Á. Bakos; Timothy M. Brown; Adam J. Burgasser; David Charbonneau; Mark C. Clampin; L. Drake Deming; John P. Doty; Edward W. Dunham; James L. Elliot; Matthew J. Holman; Shigeru Ida; Jon M. Jenkins; J. G. Jernigan; Nobuyuki Kawai; Gregory P. Laughlin; Jack J. Lissauer; F. Martel; Dimitar D. Sasselov; Robert Schingler; Sara Seager; Andrew Szentgyorgyi; Guillermo Torres; Stephane Udry; Jesus Noel Samonte Villasenor; Joshua N. Winn; Simon P. Worden

Collaboration


Dive into the Jon M. Jenkins's collaboration.

Top Co-Authors

Avatar

William J. Borucki

Rochester Institute of Technology

View shared research outputs
Top Co-Authors

Avatar

David G. Koch

NASA Exoplanet Science Institute

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Ronald L. Gilliland

Pennsylvania State University

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge