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Star Formation in the Orion Nebula I: Stellar Content
August Muench, Konstantin Getman, Lynne Hillenbrand +1
The Orion Nebula is one of the most frequently observed nearby (<1 kiloparsec) star forming regions and, consequently, the subject of a large bibliography of observations and inter…
Stellar Age Estimation from ~3 Myr to ~3 Gyr
Lynne Hillenbrand, Eric Mamajek, John Stauffer +3
We present recent progress on quantitative estimation of stellar ages using ind icators such as theoretical evolutionary tracks, rotation, rotation-driven chrom ospheric and corona…
Age-Related Observations of Low Mass Pre-Main and Young Main Sequence Stars (Invited Review)
Lynne A. Hillenbrand
This overview summarizes the age dating methods available for young sub-solar mass stars. Pre-main sequence age diagnostics include the Hertzsprung-Russell (HR) diagram, spectrosco…
Astrometry with the Keck-Interferometer: the ASTRA project and its science
Jorg-Uwe Pott, Julien Woillez, Rachel L. Akeson +22
The sensitivity and astrometry upgrade ASTRA of the Keck Interferometer is introduced. After a brief overview of the underlying interferometric principles, the technology and conce…
Formation and Evolution of Planetary Systems (FEPS): Properties of Debris Dust around Solar-type Stars
John M. Carpenter, Jeroen Bouwman, Eric E. Mamajek +12
We present Spitzer photometric (IRAC and MIPS) and spectroscopic (IRS low resolution) observations for 314 stars in the Formation and Evolution of Planetary Systems (FEPS) Legacy p…
The Palomar/Keck Adaptive Optics Survey of Young Solar Analogs: Evidence for a Universal Companion Mass Function
Stanimir Metchev, Lynne Hillenbrand
We present results from an adaptive optics survey for substellar and stellar companions to Sun-like stars. The survey targeted 266 F5-K5 stars in the 3Myr to 3Gyr age range with di…
A Large-Area Search for Low-Mass Objects in Upper Scorpius II: Age and Mass Distributions
Catherine L. Slesnick, Lynne A. Hillenbrand, John M. Carpenter
We present continued results from a wide-field, ~150 deg^2, optical photometric and spectroscopic survey of the northern part of the ~5 Myr-old Upper Scorpius OB Association. Photo…
Spatial Distributions of Young Stars
Adam L. Kraus, Lynne A. Hillenbrand
We analyze the spatial distributions of young stars in Taurus-Auriga and Upper Sco as determined from the two-point correlation function (i.e. the mean surface density of neighbors…
Redshifted Absorption at He I 10830 as a Probe of the Accretion Geometry of T Tauri Stars
William Fischer, John Kwan, Suzan Edwards +1
We probe the geometry of magnetospheric accretion in classical T Tauri stars by modeling red absorption at He I 10830 via scattering of the stellar and veiling continua. Under the…
Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
Eric E. Mamajek, Lynne A. Hillenbrand
While the strong anti-correlation between chromospheric activity and age has led to the common use of the Ca II H & K emission index (R'_HK = L_HK/L_bol) as an empirical age estima…
Disk Dispersal and Planet Formation Time Scales
Lynne A. Hillenbrand
Well before the existence of exo-solar systems was confirmed, it was accepted knowledge that most -- if not all -- stars possess circumstellar material during the first one-to-seve…
The formation and evolution of planetary systems: Grain growth and chemical processing of dust in T Tauri systems
J. Bouwman, Th. Henning, L. A. Hillenbrand +8
This paper is one in a series presenting results obtained within the Formation and Evolution of Planetary Systems (FEPS) Legacy Science Program on the Spitzer Space Telescope. Here…
UV excess measures of accretion onto young very low-mass stars and brown dwarfs
Gregory J. Herczeg, Lynne A. Hillenbrand
Low-resolution spectra from 3000-9000 AA of young low-mass stars and brown dwarfs were obtained with LRIS on Keck I. The excess UV and optical emission arising in the Balmer and Pa…
The Complete Census of 70-um-Bright Debris Disks within the FEPS (Formation and Evolution of Planetary Systems) Spitzer Legacy Survey of Sun-like Stars
Lynne A. Hillenbrand, John M. Carpenter, Jinyoung Serena Kim +7
(abbreviated) We report detection with the Spitzer Space Telescope of cool dust surrounding solar type stars. The observations were performed as part of the Legacy Science Program,…
Evolution of Mid-IR Excess Around Sun-like Stars: Constraints on Models of Terrestrial Planet Formation
M. R. Meyer, J. M. Carpenter, E. E. Mamajek +11
We report observations from the Spitzer Space Telescope (SST) regarding the frequency of 24 micron excess emission toward sun-like stars. Our unbiased sample is comprised of 309 st…
The Stellar Populations of Praesepe and Coma Berenices
Adam L. Kraus, Lynne A. Hillenbrand
We present the results of a stellar membership survey of the nearby open clusters Praesepe and Coma Berenices. We have combined archival survey data from the SDSS, 2MASS, USNOB1.0,…
TrES-4: A Transiting Hot Jupiter of Very Low Density
Georgi Mandushev, Francis T. O'Donovan, David Charbonneau +12
We report the discovery of TrES-4, a hot Jupiter that transits the star GSC 02620-00648 every 3.55 days. From high-resolution spectroscopy of the star we estimate a stellar effecti…
Near-Infrared Interferometric, Spectroscopic, and Photometric Monitoring of T Tauri Inner Disks
J. A. Eisner, L. A. Hillenbrand, R. J. White +3
We present high angular resolution observations with the Keck Interferometer, high dispersion spectroscopic observations with Keck/NIRSPEC, and near-IR photometric observations fro…
The Space Infrared Interferometric Telescope (SPIRIT): High-resolution imaging and spectroscopy in the far-infrared
David Leisawitz, Charles Baker, Amy Barger +53
We report results of a recently-completed pre-Formulation Phase study of SPIRIT, a candidate NASA Origins Probe mission. SPIRIT is a spatial and spectral interferometer with an ope…
High-resolution Spectroscopy of [Ne II] Emission from TW Hya
Gregory J. Herczeg, Joan Najita, Lynne A. Hillenbrand +1
We present high-resolution echelle spectra of [Ne II] 12.81 micron emission from the classical T Tauri star (CTTS) TW Hya obtained with MICHELLE on Gemini North. The line is center…
The dust, planetesimals and planets of HD 38529
Amaya Moro-Martin, Renu Malhotra, John M. Carpenter +6
HD 38529 is a post-main sequence G8III/IV star (3.5 Gyr old) with a planetary system consisting of at least two planets having Msin(i) of 0.8 MJup and 12.2 MJup, semimajor axes of…
High-Dispersion Optical Spectra of Nearby Stars Younger Than The Sun
R. J. White, J. M. Gabor, L. A. Hillenbrand
We present high-dispersion (R~16,000) optical (3900-8700 A) spectra of 390 stars obtained with the Palomar 60 inch telescope. The majority of stars observed are part of the Spitzer…
SIM PlanetQuest Key Project Precursor Observations to Detect Gas Giant Planets Around Young Stars
Angelle Tanner, Charles Beichman, Rachel Akeson +10
We present a review of precursor observing programs for the SIM PlanetQuest Key project devoted to detecting Jupiter mass planets around young stars. In order to ensure that the st…
TrES-3: A Nearby, Massive, Transiting Hot Jupiter in a 31-Hour Orbit
Francis T. O'Donovan, David Charbonneau, Gáspár Á. Bakos +16
We describe the discovery of a massive transiting hot Jupiter with a very short orbital period (1.30619 d), which we name TrES-3. From spectroscopy of the host star GSC 03089-00929…