Results 11 to 20 of about 71,946 (109)

The Return of Business Creation [PDF]

, 2013
Freshly released government data show that new business formation rebounded in 2011, after four years of decline, from the depths of the Great Recession.
Dane Stangler, Ian Hathaway, Jordan Bell-Masterson   +2 more
core   +1 more source

Rotation and variability of very low mass stars and brown dwarfs near Epsilon Ori

, 2004
We explore the rotation and activity of very low mass (VLM) objects by means of a photometric variability study. Our targets in the vicinity of Epsilon Ori belong to the OriOB1b population in the Orion star-forming complex. In this region we selected 143
A. Scholz, Alcalá, Allard, Bailer-Jones, Bailer-Jones, Baraffe, Barnes, Barnes, Barnes, Barrado y Navascués, Barrado y Navascués, Bertin, Bouvier, Bouvier, Bouvier, Bouvier, Béjar, Carpenter, Chabrier, Chabrier, Clarke, D'Antona, de Jager, Delfosse, Durney, Guenther, Herbst, Herbst, Herbst, Herbst, Herbst, Hillenbrand, Horne, Hussain, J. Eislöffel, Jayawardhana, Joergens, Koen, Krishnamurthi, Krishnamurthi, Königl, Kürster, Lamm, Landolt, Liebert, Lucas, López Martí, Martín, Mohanty, Mohanty, Mohanty, Mokler, Morisson, Muench, Muench, Muench, Natta, Oliveira, Patten, Porter, Roberts, Robin, Robin, Scargle, Scholz, Scholz, Stassun, Stepanov, Stetson, Terndrup, Terndrup, Zapatero Osorio, Zapatero Osorio, Zapatero Osorio   +73 more
core   +1 more source

Chemical abundances of stars with brown-dwarf companions

, 2014
It is well-known that stars with giant planets are on average more metal-rich than stars without giant planets, whereas stars with detected low-mass planets do not need to be metal-rich.
Hernández, J. I. González, Israelian, G., Sahlmann, J., Santos, N. C., Sánchez, D. Mata, Udry, S.   +5 more
core   +1 more source

Using binary statistics in Taurus-Auriga to distinguish between brown dwarf formation processes

, 2017
Whether BDs form as stars through gravitational collapse ("star-like") or BDs and some very low-mass stars constitute a separate population which form alongside stars comparable to the population of planets, e.g. through circumstellar disk ("peripheral")
Béjar, V. J. S., Kroupa, P., Lodieu, N., López, R. Rebolo, Manjavacas, M. E., Marks, M., Martín, E. L., Thies, I., Velasco, S.   +8 more
core   +1 more source

On the universal outcome of star-formation: Is there a link between stars and brown-dwarfs?

, 2003
(abridged) The recent evidence obtained by Briceno et al. that star-formation in Taurus-Auriga (TA) may be producing significantly fewer brown dwarfs (BDs) per star than the ONC is investigated by setting up a realistic model stellar plus BD population ...
Aarseth, Adams, Bate, Bhattacharyya, Bonnell, Bontemps, Boss, Boss, Bouvier, Bouvier, Bouy, Briceno, Burgasser, Burkert, Carpenter, Close, de la Fuente Marcos, Delgado-Donate, Duchêne, Duchêne, Duquennoy, Elmegreen, Estelle Moraux, Fischer, Gaspard Duchêne, Gizis, Gizis, Gomez, Haisch, Halbwachs, Hartigan, Hartmann, Hartmann, Hartmann, Henry, Hillenbrand, Hillenbrand, Horton, Jerome Bouvier, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Kroupa, Köhler, Lada, Leinert, Luhman, Luhman, Marcy, Martín, Martín, Mathieu, Matzner, Mayor, Mazeh, Mermilliod, Moraux, Motte, Muench, Muench, Myers, Padoan, Pavel Kroupa, Pinfield, Prosser, Reid, Reipurth, Reipurth, Richichi, Sterzik, Sterzik, White, White, White, Woitas, Wuchterl   +82 more
core   +1 more source

Business Dynamics Statistics Briefing: Jobs Created From Business Startups in the United States [PDF]

, 2009
Summarizes findings from new measures of business dynamics on jobs created by business start-ups in 1980-2005, compared with average annual net employment growth.
Javier Miranda, John Haltiwanger, Ron Jarmin   +2 more
core   +1 more source

Orbital effects of spatial variations of fundamental coupling constants

, 2011
We deal with the effects induced on the orbit of a test particle revolving around a central body by putative spatial variations of fundamental coupling constants $\zeta$.
Battat, Benz, Berengut, Bertotti, Calura, Calura, Casotto, Damour, Damour, Damour, Damour, Degnan, Fouchet, Grevesse, Iorio, Khan, Konopliv, Lewis, Lorenzo Iorio, Merkowitz, Murphy, Müller, Müller, Pitjeva, Turyshev, Urey, Urey, Uzan, Williams, Williams, Williams, Williams, Williams, Yoder   +33 more
core   +1 more source

X-ray emission from young brown dwarfs in the Orion Nebula Cluster [PDF]

, 2005
We use the sensitive X-ray data from the Chandra Orion Ultradeep Project (COUP) to study the X-ray properties of 34 spectroscopically-identified brown dwarfs with near-infrared spectral types between M6 and M9 in the core of the Orion Nebula Cluster ...
Baraffe I., Beate Stelzer, Comeron F., D’Antona F., Eric D. Feigelson, Ettore Flaccomio, Giusi Micela, Gwendolyn Meeus, Konstantin Getman, Kuker M., Lynne A. Hillenbrand, Mark J. McCaughrean, Neuhauser R., Nicolas Grosso, Salvatore Sciortino, Siess L., Thomas Preibisch   +16 more
core   +5 more sources

Metal-rich T-dwarfs in the Hyades cluster

, 2008
We present the results of a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625 Myr-old, metal-rich ([Fe/H]=0.14) Hyades cluster. We performed a deep (I=23, z=22.5) photometric survey over 16 deg$^2$ around the cluster center.
Eric Stempels, G. Meeus, J. Bouvier, T. Kendall   +3 more
core   +2 more sources

A bilayer Double Semion Model with Symmetry-Enriched Topological Order [PDF]

, 2016
We construct a new model of two-dimensional quantum spin systems that combines intrinsic topo- logical orders and a global symmetry called flavour symmetry.
Martin-Delgado, M. A., Ortiz, L.
core   +3 more sources