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Proposal Identification No.:

A2808 Arecibo Observatory

Date Received: 2013-Mar-01 16:29:04 William E. Gordon Telescope Observing Time Request COVER SHEET

Section I - General Information
Submitted for Mar 1 2013. This proposal has not been submitted before. Proposal Type: General Category: Sub-Category: Observation Category: Time Requested this semester: Hours Next 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 Spectroscopy Extragalactic 9 20

90 less than 100 GB

Connecting HI Disks in Dwarf Galaxies to Their Circumgalactic Medium

We request a total of 29 hours to observe 22 dwarf galaxies (LogM*= 8-10, z=0.011-0.06) from the HST COS-Dwarf sample that can be observed from the Arecibo Observatory. There are two motivations for these observations. First, by combining information about HI in the galaxy disk with information about the gas in the surrounding halos (COS-Dwarf ), we will be able to probe the baryon cycle in these galaxies. Second, this sample when combined with the GALEX Arecibo SDSS Survey (SDSS) and its subsample that is also being observed with COS (COS-GASS) would trace the variations of the gas flow process (like cold flows and momentum/energy driven outflows) over more than 3 orders of magnitude in stellar masses. With a modest investment of 29 hours, we would be able to expand on the conclusions derived from GASS, COS-GASS, and COS-Dwarf. These data would take advantage of the existing data and enhance our understanding of the baryon cycle significantly. Outreach Abstract: Cold gas is the raw material for forming stars. And therefore, whether a galaxy forms stars or not depends on the amount of gas it has. Gas gets consumed in star formation and hence it is believed that there is a continuous replenishment of gas in galaxies which enable them to form stars continuously. Unfortunately, we do not fully understand how galaxies get their gas? This program aims to combine cold gas measurements from the Arecibo telescope with space-based ultraviolet data from Hubble Space Telescope probing the halos of galaxies to trace out the gas flows in and out of galaxies. This will also tell us why some galaxies are forming stars at much higher rates than others.

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Name Sanchayeeta Borthakur Barbara Catinella

Institution Johns Hopkins University Max-Planck Institut fur Astrophysik, 85741, Garching, Germany

E-mail sanch@pha.jhu.edu bcatinel@mpa-garching.mpg.de

Phone 410 516 4738 +49 89 30000 2233

Student no no

Additional Authors
Timothy Heckman John Hopkins University Baltimore, MD 21211 email: heckman@pha.jhu.edu David Schiminovich Department of Astronomy, Columbia University, NY, NY 10027 email: ds@astro.columbia.edu phone: 212-854-7819

Jason Tumlinson Space Telescope Science Institute Baltimore, MD 21211 email: tumlinson@stsci.edu

This work is not part of a thesis.

Remote Observing Request

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

Section I I - Time Request
The following times are in LST. For these observations night-time is required.

Begin ­ End Interval­Interval 2 7 15 ­ 3:40 ­ 9:40 ­ 16:30 ­

Days Needed at This Interval 3 1 1

Time Constraints (Must Be Justified in the Prop osal Text)

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Next Semester Time Request

Begin ­ End Interval­Interval 10 ­ ­ ­ ­ 15

Days Needed at This Interval 4

Time Constraints (Must Be Justified in the Prop osal Text)

Section I I I - Instruments Needed
L-wide Atmospheric Observation Instruments:

Sp ecial Equipment or setup:

none

Section IV - RFI Considerations Frequency Ranges Planned
1337-1406. 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
Galaxy RA Dec RiseTime TransitTime SetTime J025938.429+003939.29 02:59:38.4 00:39:39.3 02:24:43 03:00:19 03:35:56 J031038.647-005143.66 03:10:38.6 -0:51:43.7 02:53:01 03:11:19 03:29:38 J082638.514+074316.52 08:26:38.5 07:43:16.5 07:19:21 08:27:23 09:35:25 J091241.577+300053.93 09:12:41.6 30:00:53.9 08:03:32 09:13:31 10:23:30 J094800.795+095815.43 09:48:00.8 09:58:15.4 08:35:18 09:48:45 11:02:13 J095915.044+050405.08 09:59:15.0 05:04:05.1 09:00:43 09:59:58 10:59:14 J105147.778-005020.73 10:51:47.8 -0:50:20.7 10:36:00 10:52:30 11:09:01 J110404.251+314015.16 11:04:04.3 31:40:15.2 10:00:15 11:04:50 12:09:24 J111808.585+263250.12 11:18:08.6 26:32:50.1 10:01:06 11:18:53 12:36:39 J112126.954+032641.67 11:21:27.0 03:26:41.7 10:29:58 11:22:10 12:14:21 3


J120443.878+275239.20 J120713.884+262455.46 J121059.721+315912.24 J121102.549+365953.89 J123603.909+264201.47 J133057.529+311950.31 J134158.410+050155.70 J134251.432+184144.52 J135625.021+251244.25 J135729.959+170429.25 J152131.733+033651.80 J154548.200+093642.24

12:04:43.9 12:07:13.9 12:10:59.7 12:11:02.5 12:36:03.9 13:30:57.5 13:41:58.4 13:42:51.4 13:56:25.0 13:57:30.0 15:21:31.7 15:45:48.2

27:52:39.2 26:24:55.5 31:59:12.2 36:59:53.9 26:42:01.5 31:19:50.3 05:01:55.7 18:41:44.5 25:12:44.2 17:04:29.2 03:36:51.8 09:36:42.2

10:50:08 10:49:57 11:08:19 11:41:54 11:19:14 12:25:47 12:43:33 12:20:26 12:37:20 12:35:38 14:29:04 14:33:43

12:05:26 12:07:56 12:11:42 12:11:44 12:36:45 13:31:35 13:42:40 13:43:31 13:57:03 13:58:09 15:22:13 15:46:27

13:20:44 13:25:55 13:15:05 12:41:35 13:54:16 14:37:24 14:41:47 15:06:36 15:16:46 15:20:40 16:15:21 16:59:11

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