Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Murphy Jr, Thomas W."'
Autor:
Sabhlok, Sanchit, Battat, James B. R., Colmenares, Nicholas R., Gonzales, Daniel P., Murphy Jr, Thomas W.
The passive retroreflector arrays placed on the moon by Apollo 11, 14 and 15 astronauts continue to produce valuable Earth-Moon range measurements that enable high-precision tests of gravitational physics, as well as studies of geo- and selenophysics
Externí odkaz:
http://arxiv.org/abs/2403.00899
Fifteen years of millimeter accuracy lunar laser ranging with APOLLO: data reduction and calibration
Autor:
Colmenares, Nicholas R., Battat, James B. R., Gonzales, Daniel P., Murphy Jr., Thomas W., Sabhlok, Sanchit
The Apache Point Lunar Laser-ranging Operation (APOLLO) has been collecting lunar range measurements for 15 years at millimeter accuracy. The median nightly range uncertainty since 2006 is 1.7 mm. A recently added Absolute Calibration System (ACS), p
Externí odkaz:
http://arxiv.org/abs/2304.11174
Autor:
Battat, James B. R., Adelberger, Eric, Colmenares, Nicholas R., Farrah, Megan, Gonzales, Daniel P., Hoyle, C. D., McMillan, Russett J., Murphy Jr., Thomas W., Sabhlok, Sanchit, Stubbs, Christopher W.
We present data from the Apache Point Observatory Lunar Laser-ranging Operation (APOLLO) covering the 15-year span from April 2006 through the end of 2020. APOLLO measures the earth-moon separation by recording the round-trip travel time of photons f
Externí odkaz:
http://arxiv.org/abs/2304.11128
Autor:
Chandler, John F., Battat, James B. R., Murphy, Jr., Thomas W., Reardon, Daniel, Reasenberg, Robert D., Shapiro, Irwin I.
We describe for the first time in the scientific literature the Planetary Ephemeris Program (PEP), an open-source general-purpose astrometric data analysis program. We discuss, in particular, the implementation of pulsar timing analysis, which was re
Externí odkaz:
http://arxiv.org/abs/2103.16745
Autor:
Turyshev, Slava G., Farr, William, Folkner, William M., Girerd, Andre R., Hemmati, Hamid, Murphy, Jr., Thomas W., Williams, James G., Degnan, John J.
Publikováno v:
Experimental Astronomy 28, 209-249 (2010)
Phobos Laser Ranging (PLR) is a concept for a space mission designed to advance tests of relativistic gravity in the solar system. PLR's primary objective is to measure the curvature of space around the Sun, represented by the Eddington parameter $\g
Externí odkaz:
http://arxiv.org/abs/1003.4961
Autor:
Turyshev, Slava G., Murphy, Jr., Thomas W., Adelberger, Eric G., Battat, James, Currie, Douglas, Folkner, William M., Gundlach, Jens, Merkowitz, Stephen M., Nordtvedt, Kenneth L., Reasenberg, Robert D., Shapiro, Irwin I., Shao, Michael, Stubbs, Christopher W., Tinto, Massimo, Williams, James G., Yu, Nan
The recent discovery of "dark energy" has challenged Einstein's general theory of relativity as a complete model for our macroscopic universe. From a theoretical view, the challenge is even stronger: general relativity clearly does not extend to the
Externí odkaz:
http://arxiv.org/abs/0902.3004
Autor:
Turyshev, Slava G., Williams, James G., Shao, Michael, Anderson, John D., Nordtvedt Jr, Kenneth L., Murphy Jr, Thomas W.
Current and future optical technologies will aid exploration of the Moon and Mars while advancing fundamental physics research in the solar system. Technologies and possible improvements in the laser-enabled tests of various physical phenomena are co
Externí odkaz:
http://arxiv.org/abs/gr-qc/0411082
Autor:
Turyshev, Slava G., Williams, James G., Nordtvedt Jr, Kenneth, Shao, Michael, Murphy Jr, Thomas W.
Publikováno v:
Lect.NotesPhys.648:311-330,2004
This paper addresses the motivation, technology and recent results in the tests of the general theory of relativity (GR) in the solar system. We specifically discuss Lunar Laser Ranging (LLR), the only technique available to test the Strong Equivalen
Externí odkaz:
http://arxiv.org/abs/gr-qc/0311039
Publikováno v:
Int.J.Mod.Phys.D13:567-582,2004
Accurate analysis of precision ranges to the Moon has provided several tests of gravitational theory including the Equivalence Principle, geodetic precession, parameterized post-Newtonian (PPN) parameters $\gamma$ and $\beta$, and the constancy of th
Externí odkaz:
http://arxiv.org/abs/gr-qc/0311021
Autor:
Dale, Daniel A., Roussel, Helene, Contursi, Alessandra, Helou, George, Dinerstein, Harriet L., Hunter, Deidre A., Hollenbach, David J., Egami, Eiichi, Matthews, Keith, Murphy, Jr., Thomas W., Lafon, Christine E., Rubin, Robert H.
Publikováno v:
Astrophys.J. 601 (2004) 813-830
The Palomar Integral Field Spectrograph was used to probe a variety of environments in nine nearby galaxies that span a range of morphological types, luminosities, metallicities, and infrared-to-blue ratios. For the first time, near-infrared spectros
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310383