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- University of ArizonaUS31 papers
- California Institute of TechnologyUS22 papers
- European Southern ObservatoryCL22 papers
- Space Telescope Science InstituteUS19 papers
- Leiden UniversityNL18 papers
- Max Planck SocietyDE17 papers
- Center for Astrophysics Harvard & SmithsonianUS16 papers
- University of OxfordGB15 papers
- Pennsylvania State UniversityUS14 papers
- National Radio Astronomy ObservatoryUS13 papers
- University of CambridgeGB13 papers
- Fermi National Accelerator LaboratoryUS12 papers
7 papers · 1 filter
Galactic masers and the Milky Way circular velocity
Jo Bovy, David W. Hogg, Hans-Walter Rix
Masers found in massive star-forming regions can be located precisely in six-dimensional phase space and therefore serve as a tool for studying Milky Way dynamics. The non-random o…
Eddington ratio governs the equivalent width of MgII emission line in active galactic nuclei
Xiao-Bo Dong, Ting-Gui Wang, Jian-Guo Wang +4
We have investigated the ensemble regularities of the equivalent widths (EWs) of MgII 2800 emission line of active galactic nuclei (AGNs), using a uniformly selected sample of 2092…
A Multi-Color Optical Survey of the Orion Nebula Cluster. Part I: the Catalog
Nicola Da Rio, Massimo Robberto, David R. Soderblom +4
We present U, B, V, I broad-band, 6200A TiO medium-band and Halpha photometry of the Orion Nebula Cluster obtained with the WFI imager at the ESO/MPI 2.2 telescope. The nearly-simu…
Dynamical masses of early-type galaxies at z~2: Are they truly superdense?
Michele Cappellari, S. di Serego Alighieri, A. Cimatti +11
We measured stellar velocity dispersions sigma and dynamical masses of 9 massive (M~10^11 Msun) early-type galaxies (ETG) from the GMASS sample at redshift 1.4<z<2.0. The sigma are…
Tracing Sagittarius Structure with SDSS and SEGUE Imaging and Spectroscopy
Brian Yanny, Heidi Jo Newberg, Jennifer A. Johnson +12
We show that the Sagittarius dwarf tidal stream can be traced with very red K/M-giant stars selected from SDSS photometry. A subset of these stars are spectroscopically confirmed w…
The velocity distribution of nearby stars from Hipparcos data I. The significance of the moving groups
Jo Bovy, David W. Hogg, Sam T. Roweis
We present a three-dimensional reconstruction of the velocity distribution of nearby stars (<~ 100 pc) using a maximum likelihood density estimation technique applied to the two-di…