Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/DenevatagP2649tp.pdf Дата изменения: Wed Jan 9 20:51:28 2013 Дата индексирования: Mon Feb 4 21:35:52 2013 Кодировка: Поисковые слова: http astrokuban.info astrokuban

Proposal Identification No.:

P2782

Date Received:

2013-Sep-04 17:09:02

Technical Page
This proposal has been submitted before. The previous proposal number is p2649. Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Pulsars Galactic 18 Hours 1 hour

Measuring Two Neutron-Star Masses Using Shapiro Delay

Very recently, Demorest et al. (2010, Nature, 467, 1081) measured a pulsar mass of 1.97 +/- 0.04 solar masses, thereby greatly extending the known range of precisely measured neutron-star masses, and significantly constraining the equation of state for supra-nuclear-density matter. This ma jor result further emphasizes the questions of (i) how high a neutron-star mass can be?and (ii) what is the true distribution of neutron-star masses?Only through additional, new neutron-star mass measurements can these fundamental questions be answered, but opportunities for this are rare. Here we request 36 hours of Arecibo time in order to improve the Shapiro delay and mass measurements of the components in one PALFA-discovered binary system and try to detect the Shapiro delay in another.

Name Julia Deneva

Institution Arecibo Observatory

E-mail deneva@naic.edu

Phone 787-878-2612, ext. 315

Student no

Remote Observing Request

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

Instrument Setup
L-wide Atmospheric Observation Instruments:

1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned

This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST. This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

2