Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/NicetagP2678tp.pdf Дата изменения: Thu Oct 13 17:32:23 2011 Дата индексирования: Mon Feb 4 17:44:39 2013 Кодировка: Поисковые слова: п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п п

Proposal Identification No.:

P2678

Date Received:

2011-Oct-03 23:44:10

Technical Page
Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: Regular Pulsars Galactic 33 Hours 1.00 hr

Refined Relativistic Orbital Elements and Mass Measurements for Two Neutron

Stars
ABSTRACT:
Arecibo observations of the pulsar­white-dwarf binaries J0621+1002 and J0751+1807 have yielded measured relativistic precession (J0621+1002), orbital decay due to gravitational radiation emission (J0751+1807), and Shapiro delay (J0751+1807). Relativistic and Keplerian orbital elements constrain these neutron stars to have masses 1.53+0.10-0.20 and 1.26+-0.014 solar masses, respectively (68 percent confidence). These mass measurements are among the very few constraints available on the equation of state of nuclear matter at high densities, and it is crucial that the uncertainties in the measurements be reduced. It has been several years since either of these pulsars has been observed at Arecibo. In this program, we will observe a full orbit of each pulsar in order to increase the precision of the relativistic orbital elements and to refine the derived mass values.

Name David J Nice

Institution Lafayette College

E-mail niced@lafayette.edu

Phone 610-330-5204

Student no

Remote Observing Request

Observer will travel to AO X Remote Observing In Absentia (instructions to operator)

Instrument Setup
430 G L-wide

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

RFI Considerations
1


Frequency Ranges Planned
420-440 MHz 1120-1700 MHz This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

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