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First results from HOPS The H2O southern Galactic Plane Survey

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First results from HOPS (The H2O southern Galactic Plane Survey) Andrew Walsh (JCU) ... Kate Brooks (ATNF) Chris Phillips (ATNF) Shari Breen (UTas) ... – PowerPoint PPT presentation

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Title: First results from HOPS The H2O southern Galactic Plane Survey


1
First results from HOPS(The H2O southern
Galactic Plane Survey)
  • Andrew Walsh (JCU)
  • Michael Burton (UNSW)
  • Graeme White (JCU)
  • Steven Longmore (CfA, USA)
  • Cormac Purcell (U. Manchester)
  • Nadia Lo (UNSW)
  • Kate Brooks (ATNF)
  • Chris Phillips (ATNF)
  • Shari Breen (UTas)

Summary at http//www.jcu.edu.au/astronomy/awalsh
/HOPS/
2
AIMS
  • Survey the southern Galaxy with Mopra at 12mm
  • 90 square degrees at 2 arcminute resolution
    l300? - 30? b lt 0.5?
  • Use MOPS zoom mode to survey multiple lines

3
Main lines surveyed
  • H2O maser
  • NH3 (1,1), (2,2), (3,3), (6,6), (9,9)
  • HC3N (3-2)
  • H69a radio recombination line
  • Many CH3OH lines
  • Many others including H62a, H64a, H65a, NH3
    (non-metastable), CCS, HC5N

4
Current status
  • Feb/March 2008 completed 31 square degrees

(b)
5
Current status
  • Feb/March 2008 completed 31 square degrees

6
Current status
  • Feb/March 2008 completed 31 square degrees
  • 700 hours observations
  • Lost only 50 hours due to weathertechnical

7
l300-310
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
8
l330-340
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
9
l359-010
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
10
l359-010
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
11
l359-010
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
12
l359-010
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
13
l359-010
H2O Masers
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
14
l359-010
H2O Masers
Post-AGB star Water Fountain (Deacon et al. 2007)
NH3 (1,1)
NH3 (2,2)
NH3 (3,3)
HC3N(3-2)
H69a
15
Results (i)
  • 199 H2O maser sites (151 New 76)
  • 6.4 maser sites per square degree (4.9 new per
    square degree)
  • New detections comparable to MMB survey!
  • MMB so far surveyed 2/3 of the Galactic
    Plane
  • ? gt800 masers and 350 new detections
  • ? 500 predicted total new detections for
    both HOPS and MMB.

16
Results (ii)
  • 500 NH3 (1,1) clumps widespread
  • Widespread detections in NH3 (2,2), (3,3), HC3N
    (3-2), radio recombination lines
  • Occasional detection of CH3OH lines at 24928,
    24933, 24934, 24959, 25018, 25124MHz, HC5N, NH3
    (6,6) and (9,9)

17
To-do List
  • Characterise Mopra beam at 12mm
  • Fix absolute flux scale at 12mm (efficiency)
  • Determine appropriate detection limit for H2O
    masers
  • Derive consistent framework for calculating
    physical characteristics of NH3 clumps
  • Publish data!
  • Follow up observations with both Mopra and ATCA
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