Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.naic.edu/vscience/schedule/tpfiles/OlmitagA2760tp.pdf Дата изменения: Thu Sep 20 00:05:56 2012 Дата индексирования: Mon Feb 4 18:06:37 2013 Кодировка: Поисковые слова: spiral galaxy

Proposal Identification No.:

A2760

Date Received:

2012-Sep-04 05:24:17

Technical Page
Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT:
Our recent discovery with the Arecibo telescope (A2712) of a previously unknown population of weak (< 0.1Jy) 6.7-GHz methanol masers (toward a sample of Hi-GAL sources) has lent support to the idea that methanol masers may be exclusively associated with the early phases of massive star formation. The final goal of this pro ject is thus to ascertain the true nature of this weak maser population. In particular, we want to determine whether they are indeed associated with an earlier phase during the evolution of high-mass (proto)stars or, rather, they simply represent a different set of excitation conditions in the pumping source. The first step in achieving this goal consists of increasing the number of detected weak maser sources to allow a more robust statistical analysis. Therefore, our main goal with this proposal is to select and observe more Hi-GAL sources in search for further weak 6.7-GHz methanol masers.

Regular Astronomy Spectroscopy Galactic 14 Hours

Establishing a larger sample of a newly discovered population of weak 6.7-GHz methanol masers toward high-mass clumps in the Hi-GAL survey

Name Luca Olmi

Institution UPR Rio Piedras (PR) and INAF (Italy)

E-mail olmi.luca@gmail.com

Phone +39-0552752216

Student no

Remote Observing Request

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

Instrument Setup
C-high Atmospheric Observation Instruments:

1


Sp ecial Equipment or setup:

none

RFI Considerations Frequency Ranges Planned
We possibly need protection from RFI currently in the range 5990 to 6020 MHz

2