Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/2015Fall/HeilestagA2980.pdf Дата изменения: Sat Mar 7 21:34:07 2015 Дата индексирования: Mon Apr 11 15:29:19 2016 Кодировка:

Proposal Identification No.:

A2980 Arecibo Observatory

Date Received: 2015-Mar-01 19:13:58 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Mar 1 2015. This proposal has not been submitted before. Proposal Type: General Category: Sub-Category: Observation Category: Time Requested this semester: Hours already used for this pro ject: Additional Hours required to complete pro ject: Minimum Useful Time: Expected Data Storage: Prop osal Title: ABSTRACT: We have recently realized a technique for measuring electron density fluctuations in the Sun's corona and found many interesting results, including: periodic fluctuations in electron column density; Coronal Mass Ejection (CME) magnetized electron clouds; turbulent spectra; power transfer from circular to linear polarization. The technique uses the propagation effects on a spacecraft downlink carrier. The goal of this proposal is to explore propagation effects in the coronae of Mira variable stars, using the OH maser lines on the far side of the star (i.e., the positive-velocity masers) as the signal. With their activity, Mira variables probably have much stronger atmospheric effects than the Sun. The masers have similar crucial qualititiies as the spacecraft carrier: high signal/noise, narrow lines, and polarization. This is completely unexplored territory in stars. If we are successful, we may open up a new observational field--the exploration and characterization of physical con Outreach Abstract: We have recently realized a technique for measuring electron density fluctuations in the Sun's corona and found many interesting results, including: periodic fluctuations in electron column density; Coronal Mass Ejection (CME) magnetized electron clouds; turbulent spectra; power transfer from circular to linear polarization. The technique uses the propagation effects on a spacecraft downlink carrier. The goal of this proposal is to explore propagation effects in the coronae of Mira variable stars, using the OH maser lines on the far side of the star (i.e., the positive-velocity masers) as the signal. With their activity, Mira variables probably have much stronger atmospheric effects than the Sun. The masers have similar crucial qualititiies as the spacecraft carrier: high signal/noise, narrow lines, and polarization. This is completely unexplored territory in stars. If we are successful, we may open up a new observational field--the exploration and characterization of physical con Regular Astronomy Spectroscopy Solar System 31

full transits are needed 100-500 GB

CAN WE MEASURE MAGNETIZED ELECTRON DENSITY FLUCTUATIONS IN MIRA-VARIABLE-STAR CORONAE?

1


Name Carl Heiles murray lewis

Institution university of california at berkeley arecibo observatory

E-mail heiles@astro.berkeley.edu bmllewis@gmail.com

Phone 510 280 8099 787 890 5010

Student no no

Additional Authors
Elizabeth Jensen ejensen@psi.edu

This work is not part of a thesis.

Remote Observing Request

X

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

Section I I - Time Request
The following times are in LST. For these observations night-time is not needed.

Begin ­ End Interval­Interval 23:45 ­ 02:25 02:35 ­ 05:10 18:05 ­ 20:44 ­

Days Needed at This Interval 4 4 4

Time Constraints (Must Be Justified in the Prop osal Text) for each source, days 2-4 should be on successive days and should follow day 1 after a 2 or 3 day interval. phil perillat should be available for consultation during the entire run.

Section I I I - Instruments Needed
L-wide 2


Atmospheric Observation Instruments:

Sp ecial Equipment or setup: Mock spectrometers

Section IV - RFI Considerations Frequency Ranges Planned

This proposal requires Iridium RFI protection at 1612 MHz between 10pm and 6am EST.

Section V - Observing List Target List
WX-Psc 01:06:25.9 12:35:53.1 23:48:53 02:25:33 IK-Tau 03:53:28.9 11:24:21.7 02:37:55 05:10:43 IRC+10420 19:26:48.1 11:21:16.7 18:11:13 20:43:48

3