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Дата индексирования: Mon Apr 11 17:39:23 2016
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Proposal Identification No.:

A3026 Arecibo Observatory

Date Received: 2015-Sep-01 15:46:17 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Sep 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: Regular Astronomy Continuum Galactic 120

2 hours less than 100 GB

Monitoring radio activity of a sample of M-dwarf stars

A growing number of planets discovered around M-dwarfs has motivated new, large surveys and studies of habitability of planets in tight, tidally locked orbits around low-mass stars. One of the related concerns is that stellar activity, especially flaring, which is common in late-type stars, may prevent planetary habitability. We propose to initiate a multifrequency monitoring of a sample of M-dwarfs that are also targets of Penn State's upcoming radial velocity survey with the near-infrared Habitable Planet Finder spectrograph. We plan to observe at L, S, and C-band frequencies and use the Mock spectrometer. As radio observations provide the most direct diagnostic of stellar flaring, our program will characterize the activity of stars with planets orbiting in their habitable zones. To design and calibrate our program, we would like to begin with a sample of five nearby dwarfs that already have extensive optical characterizations and are known to be active in this wavelength range. Outreach Abstract: Low-mass stars are very attractive targets for searches for planets, because of their abundance and a high efficiency of planet detection by the radial velocity and transit detection methods. However, such stars are known to be very active, often emitting powerful flares that could be harmful for life on nearby planets. As radio detection of flares offers excellent diagnostics of stellar activity, we propose to use the Arecibo telescope to observe a sample of low-mass, M-type stars that are also targets of optical planet searches. This will allow us to assess habitability conditions on any Earth-mass planets found by these surveys.

Name Alex Wolszczan Jan Forbrich

Institution Penn State University University of Vienna, Austria

E-mail alex@astro.psu.edu Jan Forbrich

Phone 814 863 1756 +43 - (01) 4277 53809

Student no no

1

Additional Authors
Suvrath Mahadevan, Penn State University, suvrath@astro,psu.edu, Ryan Terrien, Penn State University, rct151@psu.edu, graduate student

This work is part of a PhD 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 7:30 13:30 21:00 23:00

Days Needed at This Interval 12 12

Time Constraints (Must Be Justified in the Prop osal Text) The first 4 targets can be scheduled in contiguous runs. No need for nightly observing only.

Section I I I - Instruments Needed
L-wide C S-high

Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations
2

Frequency Ranges Planned

This proposal requires coordination with Punta Salinas radar within the band 1222-1381 MHz.. This proposal requires coordination with GPS L3 at 1381 MHz.

Section V - Observing List Target List
RA = 08 58 10 56 12 18 22 01 08 15 29 59 13 29 49 Dec +19 45 47 +07 00 53 +11 07 34 +28 18 25 = +26 46 34 Rise = 07:10 Set = 09:50 07:40 10:20 09:50 12:00 11:00 13:30 20:45 23:15

3