Zobrazeno 1 - 10
of 158
pro vyhledávání: '"WEGNER, GARY"'
We explore the possible dependencies of galaxy metal abundance and star-formation rate (SFR) on local environment, focusing on the volume of space in and around the Bootes Void. Our sample of star-forming galaxies comes from the second catalog of the
Externí odkaz:
http://arxiv.org/abs/1908.07539
We present updated metallicity relations for the spectral database of star-forming galaxies (SFGs) found in the KPNO International Spectroscopic Survey (KISS). New spectral observations of emission-line galaxies (ELGs) obtained from a variety of tele
Externí odkaz:
http://arxiv.org/abs/1801.01133
Autor:
Wegner, Gary A., Umetsu, Keiichi, Molnar, Sandor M., Nonino, Mario, Medezinski, Elinor, Andrade-Santos, Felipe, Bogdan, Akos, Lovisari, Lorenzo, Forman, William R., Jones, Christine
We report Chandra X-ray observations and optical weak-lensing measurements from Subaru/Suprime-Cam images of the double galaxy cluster Abell 2465 (z=0.245). The X-ray brightness data are fit to a beta-model to obtain the radial gas density profiles o
Externí odkaz:
http://arxiv.org/abs/1701.01767
We investigate the relationship between star formation (SF) and level of relaxation in a sample of 379 galaxy clusters at z < 0.2. We use data from the Sloan Digital Sky Survey to measure cluster membership and level of relaxation, and to select star
Externí odkaz:
http://arxiv.org/abs/1504.05191
Autor:
Wegner, Gary A., Onofrio, Roberto
Publikováno v:
European Physical Journal C 75, 307 (2015)
We discuss the potential for using neutron stars to determine bounds on the Higgs-Kretschmann coupling by looking at peculiar shifts in gamma-ray spectroscopic features. In particular, we reanalyse multiple lines observed in GRB781119 detected by two
Externí odkaz:
http://arxiv.org/abs/1503.01738
We investigate the star formation rate and its location in the major merger cluster Abell 2465 at $z$ = 0.245. Optical properties of the cluster are described in Paper I. Measurements of the H$\alpha$ and infrared dust emission of galaxies in the clu
Externí odkaz:
http://arxiv.org/abs/1412.5047
Autor:
Onofrio, Roberto, Wegner, Gary A.
Publikováno v:
Astrophysical Journal 791: 125 (2014)
We report on a search for differential shifts between electronic and vibronic transitions in carbon-rich white dwarfs BPM 27606 and Procyon B. The absence of differential shifts within the spectral resolution and taking into account systematic effect
Externí odkaz:
http://arxiv.org/abs/1409.8546
We investigate the relationship between star formation (SF) and substructure in a sample of 107 nearby galaxy clusters using data from the Sloan Digital Sky Survey (SDSS). Several past studies of individual galaxy clusters have suggested that cluster
Externí odkaz:
http://arxiv.org/abs/1401.6171
We present time-series photometry of 11 hypervelocity stars (HVSs) to constrain their nature. Known HVSs are mostly late-B spectral type objects that may be either main-sequence (MS) or evolved blue horizontal branch (BHB) stars. Fortunately, MS star
Externí odkaz:
http://arxiv.org/abs/1302.1899
The disruption of a binary star system by the massive black hole at the Galactic Centre, SgrA*, can lead to the capture of one star around SgrA* and the ejection of its companion as a hypervelocity star (HVS). We consider the possibility that these s
Externí odkaz:
http://arxiv.org/abs/1201.1446