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We have developed a new method, K2, optimized for the detection of galaxy clusters in multicolor images. Based on the Red Sequence approach, K2 detects clusters using simultaneous enhancements in both colors and position. The detection…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Karun Thanjavur , Jon Willis , David Crampton

The Kepler Mission revolutionized exoplanet science and stellar astrophysics by obtaining highly precise photometry of over 200,000 stars over 4 years. A critical piece of information to exploit Kepler data is its selection function, since…

Solar and Stellar Astrophysics · Physics 2021-05-05 Linnea M. Wolniewicz , Travis A. Berger , Daniel Huber

Over 2500 eclipsing binaries were identified and characterized from the ultra-precise photometric data provided by the Kepler space telescope. Kepler is now beginning its second mission, K2, which is proving to again provide ultra-precise…

The Kepler space telescope has revolutionised our knowledge about exoplanets and stars and is continuing to do so in the K2 mission. The exquisite photometric precision, together with the long, uninterrupted observations opened up a new way…

Solar and Stellar Astrophysics · Physics 2016-10-10 László Molnár , Róbert Szabó , Emese Plachy

Lunar occultations (LO) provide a unique combination of high angular resolution and sensitivity at near-infrared wavelenghts. At the ESO Very Large Telescope, it is possible to achieve about 1 milliarcsecond (mas) resolution and detect…

Solar and Stellar Astrophysics · Physics 2015-05-28 A. Richichi , W. P. Chen , O. Fors , P. F. Wang

The Gaia mission has provided the largest ever astrometric chart of the Milky Way. Using it to map the Galactic halo is helpful for disentangling its merger history. The identification of halo stars in Gaia DR2 with reliable distance…

Astrophysics of Galaxies · Physics 2021-11-25 Helmer H. Koppelman , Amina Helmi

Asteroseismology has proven to be an excellent tool to determine not only the global stellar properties with a good precision but also to infer stellar structure, dynamics, and evolution for a large sample of Kepler stars. Prior to the…

Solar and Stellar Astrophysics · Physics 2016-08-17 S. Mathur , R. A. Garcia , D. Huber , C. Regulo , D. Stello , P. G. Beck , K. Houmani , D. Salabert

A homogeneous search for stellar flares has been performed using every available Kepler light curve. An iterative light curve de-trending approach was used to filter out both astrophysical and systematic variability to detect flares. The…

Solar and Stellar Astrophysics · Physics 2016-09-28 James R. A. Davenport

In the third paper of this series we continue the exploitation of Kepler/K2 data in dense stellar fields using our PSF-based method. This work is focused on a ~720-arcmin^2 region centred on the Solar-metallicity and Solar-age open cluster…

Solar and Stellar Astrophysics · Physics 2016-09-07 D. Nardiello , M. Libralato , L. R. Bedin , G. Piotto , L. Borsato , V. Granata , L. Malavolta , V. Nascimbeni

The Kepler Space Telescope is currently searching for planets transiting stars along the ecliptic plane as part of its extended K2 mission. We processed the publicly released data from the first year of K2 observations (Campaigns 0, 1, 2,…

We measure the luminosity function (LF) of the Milky Way's stellar halo, using a magnitude complete, distance limited sample of stars from $Gaia$ DR3. Stars with high transverse velocities are selected, to isolate a high purity sample of…

Astrophysics of Galaxies · Physics 2026-03-13 Sarah A. Bird , Chris Flynn , Rudra Sekhri , Hai-Jun Tian , Juntai Shen , Xiang-Xiang Xue , Chao Liu , Gang Zhao

We outline the purpose, strategy and first results of a deep, high cadence, photometric survey of the Kepler field using the Isaac Newton Telescope on La Palma and the MDM 1.3m Telescope on Kitt Peak. Our goal was to identify sources…

NASA's K2 mission is observing tens of thousands of stars along the ecliptic, providing data suitable for large scale asteroseismic analyses to inform galactic archaeology studies. Its first campaign covered a field near the north galactic…

Solar and Stellar Astrophysics · Physics 2017-01-25 D. Stello , J. Zinn , Y. Elsworth , R. A. Garcia , T. Kallinger , S. Mathur , B. Mosser , S. Sharma , W. J. Chaplin , G. Davies , D. Huber , C. D. Jones , A. Miglio , V. S. Aguirre

The Century Survey Galactic Halo Project is a photometric and spectroscopic survey from which we select relatively blue stars (V-R<0.30 mag) as probes of the Milky Way halo. The Survey strip spans the range of Galactic latitude 35<b<88 deg,…

Rotation curves are the key observational manifestation of the dark matter distribution around late-type galaxies. In a halo model context, the precision of constraints on halo parameters is a complex function of the properties of the…

Astrophysics of Galaxies · Physics 2024-02-27 Tariq Yasin , Harry Desmond , Julien Devriendt , Adrianne Slyz

We present the first results of the application of supervised classification methods to the Kepler Q1 long-cadence light curves of a subsample of 2288 stars measured in the asteroseismology program of the mission. The methods, originally…

We present 151 planet candidates orbiting 141 stars from K2 campaigns 5-8 (C5-C8), identified through a systematic search of K2 photometry. In addition, we identify 16 targets as likely eclipsing binaries, based on their light curve…

The original {\it Kepler} mission observed and characterized over 2400 eclipsing binaries in addition to its prolific exoplanet detections. Despite the mechanical malfunction and subsequent non-recovery of two reaction wheels used to…

The Kepler Mission began its 3.5-year photometric monitoring campaign in May 2009 on a select group of approximately 150,000 stars. The stars were chosen from the ~half million in the field of view that are brighter than 16th magnitude. The…

We provide the first full K2 transiting exoplanet sample, using photometry from Campaigns 1-8 and 10-18, derived through an entirely automated procedure. This homogeneous planet candidate catalog is a crucial to perform a robust demographic…