Zobrazeno 1 - 10
of 135
pro vyhledávání: '"P Sturch"'
Autor:
Beaton, Rachael L., Freedman, Wendy L., Madore, Barry F., Bono, Giuseppe, Carlson, Erika K., Clementini, Gisella, Durbin, Meredith J., Garofalo, Alessia, Hatt, Dylan, Jang, In Sung, Kollmeier, Juna A., Lee, Myung Gyoon, Monson, Andrew J., Rich, Jeffrey A., Scowcroft, Victoria, Seibert, Mark, Sturch, Laura, Yang, Soung-Chul
We present an overview of the Carnegie-Chicago Hubble Program, an ongoing program to obtain a 3 per cent measurement of the Hubble constant using alternative methods to the traditional Cepheid distance scale. We aim to establish a completely independ
Externí odkaz:
http://arxiv.org/abs/1604.01788
Autor:
Majaess, D., Sturch, L., Bidin, C. Moni, Soto, M., Gieren, W., Cohen, R., Mauro, F., Geisler, D., Bonatto, C., Borissova, J., Minniti, D., Turner, D., Lane, D., Madore, B., Carraro, G., Berdnikov, L.
Cepheids are key to establishing the cosmic distance scale. Therefore it's important to assess the viability of QZ Nor, V340 Nor, and GU Nor as calibrators for Leavitt's law via their purported membership in the open cluster NGC 6067. The following s
Externí odkaz:
http://arxiv.org/abs/1305.3914
Autor:
Freedman, Wendy L., Madore, Barry F., Scowcroft, Vicky, Monson, Andy, Persson, S. E., Seibert, Mark, Rigby, Jane, Sturch, Laura, Stetson, Peter
We present an overview of and preliminary results from an ongoing comprehensive program that has a goal of determining the Hubble constant to a systematic accuracy of 2%. As part of this program, we are currently obtaining 3.6 micron data using the I
Externí odkaz:
http://arxiv.org/abs/1109.3802
Autor:
Scowcroft, Victoria, Freedman, Wendy, Madore, Barry F., Monson, Andrew J., Persson, S. E., Seibert, Mark, Rigby, Jane R., Sturch, Laura
The Carnegie Hubble Program (CHP) is designed to improve the extragalactic distance scale using data from the post-cryogenic era of Spitzer. The ultimate goal is a determination of the Hubble constant to an accuracy of 2%. This paper is the first in
Externí odkaz:
http://arxiv.org/abs/1108.4672
Autor:
Freedman, Wendy L., Burns, Christopher R., Phillips, M. M., Wyatt, Pamela, Persson, S. E., Madore, Barry F., Contreras, Carlos, Folatelli, Gaston, Gonzalez, E. Sergio, Hamuy, Mario, Hsiao, Eric, Kelson, Daniel D., Morrell, Nidia, Murphy, D. C., Roth, Miguel, Stritzinger, Maximilian, Sturch, Laura, Suntzeff, Nick B., Astier, P., Balland, C., Bassett, Bruce, Boldt, Luis, Carlberg, R. G., Conley, Alexander J., Frieman, Joshua A., Garnavich, Peter M., Guy, J., Hardin, D., Howell, D. Andrew, Kessler, Richard, Lampeitl, Hubert, Marriner, John, Pain, R., Perrett, Kathy, Regnault, N., Riess, Adam G., Sako, Masao, Schneider, Donald P., Sullivan, Mark, Wood-Vasey, Michael
Publikováno v:
Astrophys.J.704:1036-1058,2009
The Carnegie Supernova Project (CSP) is designed to measure the luminosity distance for Type Ia supernovae (SNe Ia) as a function of redshift, and to set observational constraints on the dark energy contribution to the total energy content of the Uni
Externí odkaz:
http://arxiv.org/abs/0907.4524
Autor:
Freedman, Wendy L., Rigby, Jane, Madore, Barry F., Persson, S. E., Sturch, Laura, Mager, Violet
Publikováno v:
Astrophys.J.695:996-998,2009
We present mid-infrared Period-Luminosity relations for Cepheids in the Local Group galaxy IC1613. Using archival IRAC imaging data from Spitzer we were able to measure single-epoch magnitudes for five, 7 to 50-day, Cepheids at 3.6 and 4.5 microns. W
Externí odkaz:
http://arxiv.org/abs/0901.2907
Autor:
Madore, Barry F., Rigby, Jane, Freedman, Wendy L., Persson, S. E., Sturch, Laura, Mager, Violet
Publikováno v:
Astrophys.J.693:936-939,2009
We present the first application of mid-infrared Period-Luminosity relations to the determination of a Cepheid distance beyond the Magellanic Clouds. Using archival IRAC imaging data on NGC 6822 from Spitzer we were able to measure single-epoch magni
Externí odkaz:
http://arxiv.org/abs/0812.0186
Autor:
Madore, Barry F., Freedman, Wendy L., Rigby, Jane, Persson, S. E., Sturch, Laura, Major, Violet
Publikováno v:
Astrophys.J.695:988-995,2009
We present revised and improved mid-infrared Period-Luminosity (PL) relations for Large Magellanic Cloud (LMC) Cepheids based on double-epoch data of 70 Cepheids observed by Spitzer at 3.6, 4.5, 5.8 and 8.0um. The observed scatter at all wavelengths
Externí odkaz:
http://arxiv.org/abs/0811.2533
Autor:
Lasker, B. M., Lattanzi, M. G., McLean, B. J., Bucciarelli, B., Drimmel, R., Garcia, J., Greene, G., Guglielmetti, F., Hanley, C., Hawkins, G., Laidler, V. G., Loomis, C., Meakes, M., Mignani, R., Morbidelli, R., Morrison, J., Pannunzio, R., Rosenberg, A., Sarasso, M., Smart, R. L., Spagna, A., Sturch, C. R., Volpicelli, A., White, R. L., Wolfe, D., Zacchei, A.
The GSC-II is an all-sky database of objects derived from the uncompressed DSS that the STScI has created from the Palomar and UK Schmidt survey plates and made available to the community. Like its predecessor (GSC-I), the GSC-II was primarily create
Externí odkaz:
http://arxiv.org/abs/0807.2522
We present the first mid-infrared Period-Luminosity (PL) relations for Large Magellanic Cloud (LMC) Cepheids. Single-epoch observations of 70 Cepheids were extracted from Spitzer IRAC observations at 3.6, 4.5, 5.8 and 8.0 microns, serendipitously obt
Externí odkaz:
http://arxiv.org/abs/0801.2275