Zobrazeno 1 - 10
of 49
pro vyhledávání: '"ADAMS, JOSHUA J."'
Autor:
Simon, Joshua D., Jacobson, Heather R., Frebel, Anna, Thompson, Ian B., Adams, Joshua J., Shectman, Stephen A.
Publikováno v:
Astrophys.J.802:93,2015
We present a homogeneous chemical abundance analysis of five of the most metal-poor stars in the Sculptor dwarf spheroidal galaxy. We analyze new and archival high resolution spectroscopy from Magellan/MIKE and VLT/UVES and determine stellar paramete
Externí odkaz:
http://arxiv.org/abs/1412.5176
Autor:
Chonis, Taylor S., Frantz, Amy, Hill, Gary J., Clemens, J. Christopher, Lee, Hanshin, Tuttle, Sarah E., Adams, Joshua J., Marshall, J. L., DePoy, D. L., Prochaska, Travis
The Visible Integral-field Replicable Unit Spectrograph (VIRUS) is a baseline array of 150 copies of a simple, fiber-fed integral field spectrograph that will be deployed on the Hobby-Eberly Telescope (HET). VIRUS is the first optical astronomical in
Externí odkaz:
http://arxiv.org/abs/1407.7537
Autor:
Adams, Joshua J., Simon, Joshua D., Fabricius, Maximilian H., Bosch, Remco C. E. van den, Barentine, John C., Bender, Ralf, Gebhardt, Karl, Hill, Gary J., Murphy, Jeremy D., Swaters, R. A., Thomas, Jens, van de Ven, Glenn
We present new constraints on the density profiles of dark matter (DM) halos in seven nearby dwarf galaxies from measurements of their integrated stellar light and gas kinematics. The gas kinematics of low mass galaxies frequently suggest that they c
Externí odkaz:
http://arxiv.org/abs/1405.4854
Autor:
Chonis, Taylor S., Blanc, Guillermo A., Hill, Gary J., Adams, Joshua J., Finkelstein, Steven L., Gebhardt, Karl, Kollmeier, Juna A., Ciardullo, Robin, Drory, Niv, Gronwall, Caryl, Hagen, Alex, Overzier, Roderik A., Song, Mimi, Zeimann, Gregory R.
We present new results on the spectrally resolved Lyman-alpha (LyA) emission of three LyA emitting field galaxies at z~2.4 with high LyA equivalent width (>100 Angstroms) and LyA luminosity (~10^43 erg/s). At 120 km/s (FWHM) spectral resolution, the
Externí odkaz:
http://arxiv.org/abs/1308.1957
Autor:
Adams, Joshua J., Simon, Joshua D., Bolatto, Alberto D., Sloan, G. C., Sandstrom, Karin M., Schmiedeke, Anika, van Loon, Jacco Th., Oliveira, Joana M., Keller, Luke D.
We use mid-infrared Spitzer spectroscopy and far-infrared Herschel photometry for a sample of twenty main sequence O9--B2 stars in the Small Magellanic Cloud (SMC) with strong 24 micron excesses to investigate the origin of the mid-IR emission. Eithe
Externí odkaz:
http://arxiv.org/abs/1305.4954
Autor:
Ciardullo, Robin, Gronwall, Caryl, Adams, Joshua J., Blanc, Guillermo A., Gebhardt, Karl, Finkelstein, Steven L., Jogee, Shardha, Hill, Gary J., Drory, Niv, Hopp, Ulrich, Schneider, Donald P., Zeimann, Gregory R., Dalton, Gavin B.
We present an analysis of the luminosities and equivalent widths of the 284 z < 0.56 [O II]-emitting galaxies found in the 169 square arcmin pilot survey for the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). By combining emission-line fluxe
Externí odkaz:
http://arxiv.org/abs/1304.5537
We use the Mitchell Spectrograph (formerly VIRUS-P) on the McDonald Observatory 2.7m Harlan J. Smith Telescope to search for the chemical signatures of massive elliptical galaxy assembly. The Mitchell Spectrograph is an integral-field spectrograph wi
Externí odkaz:
http://arxiv.org/abs/1202.4464
Autor:
Adams, Joshua J., Gebhardt, Karl, Blanc, Guillermo A., Fabricius, Maximilian H., Hill, Gary J., Murphy, Jeremy D., Bosch, Remco C. E. van den, van de Ven, Glenn
We study the mass distribution in the late-type dwarf galaxy NGC 2976 through stellar kinematics obtained with the VIRUS-P integral-field spectrograph and anisotropic Jeans models as a test of cosmological simulations and baryonic processes that puta
Externí odkaz:
http://arxiv.org/abs/1110.5951
We present 2-D stellar kinematics of M87 out to R = 238" taken with the integral field spectrograph VIRUS-P. We run a large set of axisymmetric, orbit-based dynamical models and find clear evidence for a massive dark matter halo. While a logarithmic
Externí odkaz:
http://arxiv.org/abs/1101.1957
We present new integral-field spectroscopy in the outskirts of two nearby, edge-on, late-type galaxies to search for the H-alpha emission that is expected from the exposure of their hydrogen gas to the metagalactic ultraviolet background (UVB). Despi
Externí odkaz:
http://arxiv.org/abs/1012.3188