We compare galaxy scaling relations as a function of environment at z~2 with our ZFIRE survey where we have measured H{alpha} fluxes for 90 star-forming galaxies selected from a mass-limited (log(M_*_/M_{sun}_)>9) sample based on ZFOURGE. The cluster galaxies (37) are part of a confirmed system at z=2.095 and the field galaxies (53) are at 1.9<z<2.4; all are in the COSMOS legacy field. There is no statistical difference between H{alpha}-emitting cluster and field populations when comparing their star formation rate (SFR), stellar mass (M_*_), galaxy size (r_eff_), SFR surface density ({Sigma}(H{alpha}_star_)), and stellar age distributions. The only difference is that at fixed stellar mass, the H{alpha}-emitting cluster galaxies are log(r_eff_)~0.1 larger than in the field. Approximately 19% of the H{alpha} emitters in the cluster and 26% in the field are IR-luminous (L_IR_>2x10^11^L_{sun}_). Because the luminous IR galaxies in our combined sample are ~5 times more massive than the low-IR galaxies, their radii are ~70% larger. To track stellar growth, we separate galaxies into those that lie above, on, or below the H{alpha} star-forming main sequence (SFMS) using {Delta}SFR(M*)=+/-0.2dex. Galaxies above the SFMS (starbursts) tend to have higher H{alpha} SFR surface densities and younger light-weighted stellar ages than galaxies below the SFMS. Our results indicate that starbursts (+SFMS) in the cluster and field at z~2 are growing their stellar cores. Lastly, we compare to the (SFR-M*) relation from Rhapsody-G cluster simulations and find that the predicted slope is nominally consistent with the observations. However, the predicted cluster SFRs tend to be too low by a factor of ~2, which seems to be a common problem for simulations across environment.
We present very deep spectrophotometry of 14 bright extragalactic HII regions belonging to spiral, irregular, and blue compact galaxies. The data for 13 objects were taken with the High Resolution Echelle Spectrometer on the Keck I telescope. We have measured CII recombination lines in 10 of the objects and OII recombination lines in eight of them. We have determined electron temperatures from line ratios of several ions, especially those of low ionization potential.
Launched in 2009, the Kepler Mission is surveying a region of our galaxy to determine what fraction of stars
in our galaxy have planets and measure the size distribution of those exoplanets.
Although Kepler completed its primary mission to determine the fraction of stars that have planets in 2013,
it is continuing the search, using a more limited survey mode, under the new name K2.
This service is the main Kepler data search.
This interface joins the Kepler Target Catalog (KTC) with other tables to allow users to access the Kepler data archive. Observed Kepler targets are included with their associated data set names. Since most of the Kepler light curve data is still proprietary, public data can be found by searching for release dates earlier than todays date.
The KIC, or Kepler Input Catalog, is the primary source of information about objects observed as part of the ground-based Kepler Spectral Classification Program (SCP) in preparation for the selection of Kepler PI and GO targets. The KIC lists objects down to 21st magnitude, but it is not complete to this limit. Light from only about 1/3 of these 14 million objects falls on the Kepler CCD detector. A small number of the KIC objects are calibration objects distributed across the sky.
Launched in 2009, the Kepler Mission is surveying a region of our galaxy to determine what fraction of stars
in our galaxy have planets and measure the size distribution of those exoplanets.
Although Kepler completed its primary mission to determine the fraction of stars that have planets in 2013,
it is continuing the search, using a more limited survey mode, under the new name K2.
The K2 Data Search Service provides the main catalog for all K2 data.
Launched in 2009, the Kepler Mission is surveying a region of our galaxy to determine what fraction of stars
in our galaxy have planets and measure the size distribution of those exoplanets.
Although Kepler completed its primary mission to determine the fraction of stars that have planets in 2013,
it is continuing the search, using a more limited survey mode, under the new name K2.
The K2 Ecliptic Plane Input Catalog is the primary source of information about
objects observed as potential targets for the K2 mission, as the Kepler Input Catalog was used for the original Kepler mission.
Launched in 2009, the Kepler Mission is surveying a region of our galaxy to determine what fraction of stars
in our galaxy have planets and measure the size distribution of those exoplanets.
Although Kepler completed its primary mission to determine the fraction of stars that have planets in 2013,
it is continuing the search, using a more limited survey mode, under the new name K2.
KOI is the Kepler Objects of Interest catalog listing observed Kepler targets which are flagged as potentially having
exoplanets but may be false positives caused by other types of transient detection. This catalog is produced by the Kepler
project and brought to MAST via NExScI.
"Kepler Published Planets" is a catalog created from NExScI catalogs listing of published exoplanets found using
Kepler. All included metadata is from the published paper.
The Kepler Target Search interface provides access to a 12.5 million row table created by MAST by joining entries from the Kepler Input catalog (KIC) with the Kepler Characteristics table (CT) and merging these with "associated" entries from the United Kingdom Infrared Telescope (IRT) project, the USNOb catalog, GALEX, the Kepler Isaac Newton Telescope Survey (KIS), and the Everett KPNO (UBV) survey. The search interface allows users to find targets within the Kepler field of view (FOV) and allows searches on magnitudes, colors, and other parameters for both KIC and associated non-KIC targets.
This is the recommended interface for potential guest observers to locate possible targets for observation. GO proposers however should check on the target's position by either (or both) looking to one of our posted FFI images and seeing if it is on a chip, and (2) confirming this with the GO office.