Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Marble, Andrew R"'
We describe here a procedure to combine measurements in the 393.37 nm Ca II K spectral line taken at different observatories. Measurements from the National Solar Observatory (NSO) Integrated Sunlight Spectrometer (ISS) on the Synoptic Optical Long-t
Externí odkaz:
http://arxiv.org/abs/1702.00838
Autor:
Hughes, Anna L. H., Bertello, Luca, Marble, Andrew R., Oien, Niles A., Petrie, Gordon, Pevtsov, Alexei A.
Recently, the National Solar Observatory (NSO) Solar-atmosphere Pipeline Working Group has undertaken the production of synoptic maps from Helioseismic and Magnetic Imager (HMI) magnetograms. A set of maps has been processed spanning the data availab
Externí odkaz:
http://arxiv.org/abs/1605.03500
Autor:
Bertello, Luca, Marble, Andrew R.
The Vector Spectromagnetograph (VSM) instrument on the Synoptic Optical Long-term Investigations of the Sun (SOLIS) telescope is designed to obtain high-quality magnetic field observations in both the photosphere and chromosphere by measuring the Zee
Externí odkaz:
http://arxiv.org/abs/1507.07976
Autor:
Marble, Andrew R
This dissertation addresses two cosmological applications of the Lyman-alpha (Ly ɑ) forest observed in QSO pairs separated by several arcminutes or less. The Ly ɑ flux autocorrelation and cross-correlation provide a measurement of cosmic geometry a
Externí odkaz:
http://hdl.handle.net/10150/193945
The Vector Spectromagnetograph (VSM) instrument on the Synoptic Optical Longterm Investigations of the Sun (SOLIS) telescope is capable of obtaining spectropolarimetry for the full Sun (or a select latitudinal range) with one arcsecond spatial resolu
Externí odkaz:
http://arxiv.org/abs/1312.2909
The purpose of the SOLIS Zeemanfit Code is to provide a straight-forward, easily checked measure of the total magnetic-field strength in the high-strength umbral regions of the solar disk. In the highest-strength regions, the Zeeman splitting of the
Externí odkaz:
http://arxiv.org/abs/1312.2026
Autor:
Berg, Danielle A., Skillman, Evan D., Garnett, Donald R., Croxall, Kevin V., Marble, Andrew R., Smith, J. D., Gordon, Karl, Kennicutt Jr, Robert C.
Motived by recent ISM studies, we present high quality MMT and Gemini spectroscopic observations of H II regions in the nearby spiral galaxies NGC 628 and NGC 2403 in order to measure their chemical abundance gradients. Using long-slit and multi-obje
Externí odkaz:
http://arxiv.org/abs/1309.0584
Autor:
Berg, Danielle A., Skillman, Evan D., Marble, Andrew R., van Zee, Liese, Engelbracht, Charles W., Lee, Janice C., Kennicutt, Jr., Robert C., Calzetti, Daniela, Dale, Daniel A., Johnson, Benjamin D.
We present MMT spectroscopic observations of HII regions in 42 low luminosity galaxies in the LVL. For 31 galaxies, we measured the temperature sensitive [O III] line at a strength of 4 sigma or greater, and thus determine direct oxygen abundances. O
Externí odkaz:
http://arxiv.org/abs/1205.6782
Autor:
Gordon, Karl D., Meixner, Margaret, Meade, Marilyn, Whitney, Barbara A., Engelbracht, Charles W., Bot, Caroline, Boyer, Martha L, Lawton, Brandon, Sewilo, Marta, Babler, Mr. Brian L., Bernard, Jean-Philippe, Bracker, Steve, Block, Miwa, Blum, Robert D., Bolatto, Alberto D., Bonanos, Alceste Zoe, Harris, Jason, Hora, Joseph L., Indebetouw, Remy, Misselt, Karl A., Reach, William T., Shiao, B., Tielens, Alexander, Carlson, Lynn Redding, Churchwell, Edward B., Clayton, Geoff C., Chen, C-H Rosie, Cohen, Martin, Fukui, J. Lewis, Gorjian, Varoujan, Hony, Sacha, Israel, Frank, Kawamura, Akiko, Kemper, F., Leroy, Adam K., Li, Aigen, Madden, Suzanne C., Marble, Andrew R., McDonald, Iain, Mizuno, Akira, Mizuno, Norikazu, Muller, EriK, Oliveira, Joana M., Olsen, Knut A. G., Onishi, T., Paladini, Roberta, Paradis, Deborah, Points, Sean, Robitaille, Thomas, Rubin, Douglas, Sandstrom, Karin, Sato, S, Shibai, Hiroshi, Simon, Joshua D., Smith, Linda J, Srinivasan, Sundar, Vijh, Uma P., Van Dyk, Schuyler D., van Loon, Jacobus Theodorus, Zaritsky, Dennis F.
The Small Magellanic Cloud (SMC) provides a unique laboratory for the study of the lifecycle of dust given its low metallicity (~1/5 solar) and relative proximity (~60 kpc). This motivated the SAGE-SMC (Surveying the Agents of Galaxy Evolution in the
Externí odkaz:
http://arxiv.org/abs/1107.4313
We present new MMT spectroscopic observations of four dwarf galaxies representative of a larger sample observed by the Sloan Digital Sky Survey (SDSS) and identified by Peeples et al. (2008) as low-mass, high oxygen abundance outliers from the mass-m
Externí odkaz:
http://arxiv.org/abs/1105.4556