Search

Now showing items 1-10 of 111

Double-Peaked Narrow-Line Active Galactic Nuclei. II. The Case Of Equal Peaks

Smith, K. L.; Shields, Gregory A.; Salviander, Sarah; Stevens, A. C.; Rosario, D. J. (2012-06)

Active galactic nuclei (AGNs) with double-peaked narrow lines (DPAGNs) may be caused by kiloparsec-scale binary AGNs, bipolar outflows, or rotating gaseous disks. We examine the class of DPAGNs in which the two narrow-line ...

The Herschel Stripe 82 Survey (HerS): Maps and Early Catalog

Viero, M. P.; Asboth, V.; Roseboom, I. G.; Moncelsi, L.; Marsden, G.; Cooper, E. Mentuch; Zemcov, M.; Addison, G.; Baker, A. J.; Beelen, A.; Bock, J.; Bridge, C.; Conley, A.; Devlin, M. J.; Dore, O.; Farrah, D.; Finkelstein, S.; Font-Ribera, A.; Geach, J. E.; Gebhardt, Karl; Gill, A.; Glenn, Jason; Hajian, A.; Halpern, M.; Jogee, S.; Kurczynski, P.; Lapi, A.; Negrello, M.; Oliver, S. J.; Papovich, C.; Quadri, R.; Ross, N.; Scott, D.; Schulz, B.; Somerville, R.; Spergel, D. N.; Vieira, J. D.; Wang, L.; Wechsler, R. (2014-02)

We present the first set of maps and band-merged catalog from the Herschel Stripe 82 Survey (HerS). Observations at 250, 350, and 500 mu m were taken with the Spectral and Photometric Imaging Receiver instrument aboard the ...

The Factory And The Beehive. II. Activity And Rotation In Praesepe And The Hyades

Douglas, S. T.; Agueros, M. A.; Covey, Kevin R.; Bowsher, E. C.; Bochanski, J. J.; Cargile, P. A.; Kraus, Adam; Law, N. M.; Lemonias, J. J.; Arce, Hector G.; Fierroz, D. F.; Kundert, A. (2014-11)

Open clusters are collections of stars with a single, well-determined age, and can be used to investigate the connections between angular-momentum evolution and magnetic activity over a star's lifetime. We present the ...

New ATLAS9 And MARCS Model Atmosphere Grids For The Apache Point Observatory Galactic Evolution Experiment (APOGEE)

Meszaros, Sz.; Prieto, C. Allende; Edvardsson, B.; Castelli, F.; Perez, A. E. G.; Gustafsson, B.; Majewski, S. R.; Plez, B.; Schiavon, R.; Shetrone, M.; de Vicente, A. (2012-10)

We present a new grid of model photospheres for the SDSS-III/APOGEE survey of stellar populations of the Galaxy, calculated using the ATLAS9 and MARCS codes. New opacity distribution functions were generated to calculate ...

Limits On Planets Around Pulsating White Dwarf Stars

Mullally, Fergal; Winget, D. E.; Degennaro, Steven; Jeffery, Elizabeth; Thompson, Susan E.; Chandler, Dean; Kepler, S. O. (2008-03)

We present limits on planetary companions to pulsating white dwarf stars. A subset of these stars exhibit extreme stability in the period and phase of some of their pulsation modes; a planet can be detected around such a ...

Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results

Hinshaw, G.; Larson, D.; Komatsu, Eiichiro; Spergel, D. N.; Bennett, C. L.; Dunkley, J.; Nolta, M. R.; Halpern, M.; Hill, R. S.; Odegard, N.; Page, L.; Smith, K. M.; Weiland, J. L.; Gold, B.; Jarosik, N.; Kogut, A.; Limon, M.; Meyer, S. S.; Tucker, G. S.; Wollack, E.; Wright, E. L. (2013-10)

We present cosmological parameter constraints based on the final nine-year Wilkinson Microwave Anisotropy Probe (WMAP) data, in conjunction with a number of additional cosmological data sets. The WMAP data alone, and in ...

Kiloparsec-Scale Spatial Offsets In Double-Peaked Narrow-Line Active Galactic Nuclei. I. Markers For Selection Of Compelling Dual Active Galactic Nucleus Candidates

Comerford, Julia M.; Gerke, Brian F.; Stern, Daniel; Cooper, Michael C.; Weiner, Benjamin J.; Newman, Jeffrey A.; Madsen, Kristin; Barrows, R. Scott (2012-07)

Merger-remnant galaxies with kiloparsec (kpc) scale separation dual active galactic nuclei (AGNs) should be widespread as a consequence of galaxy mergers and triggered gas accretion onto supermassive black holes, yet very ...

Identification Of Outflows And Candidate Dual Active Galactic Nuclei In SDSS Quasars At Z=0.8-1.6

Barrows, R. Scott; Lacy, Claud H. Sandberg; Kennefick, Julia; Comerford, Julia M.; Kennefick, Daniel; Berrier, Joel C. (2013-06)

We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8 < z < 1.6 with double peaks in either of the high-ionization narrow emission lines [Ne V]lambda 3426 or [Ne III]lambda 3869. These sources ...

VLT/FLAMES Spectroscopy Of Red Giant Branch Stars In The Fornax Dwarf Spheroidal Galaxy

Lemasle, B.; de Boer, T. J. L.; Hill, V.; Tolstoy, E.; Irwin, M. J.; Jablonka, P.; Venn, K.; Battaglia, G.; Starkenburg, E.; Shetrone, M.; Letarte, B.; Francois, P.; Helmi, A.; Primas, F.; Kaufer, A.; Szeifert, T. (2014-12)

Context. Fornax is one of the most massive dwarf spheroidal galaxies in the Local Group. The Fornax field star population is dominated by intermediate age stars but star formation was going on over almost its entire history. ...

Testing the Asteroseismic Mass Scale Using Metal-Poor Stars Characterized With APOGEE and Kepler

Epstein, Courtney R.; Elsworth, Yvonne P.; Johnson, Jennifer A.; Shetrone, Matthew; Mosser, Benoit; Hekker, Saskia; Tayar, Jamie; Harding, Paul; Pinsonneault, Marc; Aguirre, Victor Silva; Basu, Sarbani; Beers, Timothy C.; Bizyaev, Dmitry; Bedding, Timothy R.; Chaplin, William J.; Frinchaboy, Peter M.; Garcia, Rafael A.; Perez, Ana E. Garcia; Hearty, Fred R.; Huber, Daniel; Ivans, Inese I.; Majewski, Steven R.; Mathur, Savita; Nidever, David; Serenelli, Aldo; Schiavon, Ricardo P.; Schneider, Donald P.; Schoenrichi, Ralph; Sobeck, Jennifer S.; Stassun, Keivan G.; Stello, Dennis; Zasowski, Gail (2014-04)

Fundamental stellar properties, such as mass, radius, and age, can be inferred using asteroseismology. Cool stars with convective envelopes have turbulent motions that can stochastically drive and damp pulsations. The ...

1
2
3
4
. . .
12