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Recent Astronomy Progress and Discoveries in Astrophysics

Explore highlights from recent astronomy research discussions covering various topics such as gas clouds, pulsar distances, and water fountain phenomena. Stay updated on the latest findings in space exploration.

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Recent Astronomy Progress and Discoveries in Astrophysics

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  1. ATUC Meeting, 14 May 2009, Astro IssuesRobert Braun

  2. Recent Science Highlights GASS: DRI • δ ≤ +1, -400 < VLSR < +500 km/s • 16 arcmin, 1 km/s, ΔTB ~ 57 mK • ΔNHI (@ ΔV = 30 km/s) ~ 5 x 1017 cm-2 CSIRO ATUC, Astro Issues

  3. Recent Science Highlights CSIRO ATUC, Astro Issues

  4. Recent Science Highlights • GASS early science • Large population of small clouds: 30 pc, 600 MSun • Cloud-to-cloud dispersion of 18 km/s, scale-height 400 pc • Association with star-formation driven processes in spiral arms (SN, winds) CSIRO ATUC, Astro Issues

  5. Recent Science Highlights Parkes Methanol Multi-Beam Survey • Final observing just completed, first papers published CSIRO ATUC, Astro Issues

  6. Recent Science Highlights • Parkes MMB Survey • -2 < b < +2, -180 < l +60, Methanol 6668 & OH 6035 MHz • Deep Pulsar Piggyback region • ATCA or Merlin follow-up of new detections CSIRO ATUC, Astro Issues

  7. Recent Science Highlights • Parkes MMB Survey, early science • Detection of Methanol masers in both the near- and far 3 kpc spiral arms CSIRO ATUC, Astro Issues

  8. Recent Science Highlights First case of large-scale HI associated with an FRII CSIRO ATUC, Astro Issues

  9. Recent Science Highlights • First case of large-scale HI associated with an FRII • 2x109 MSun with ΔV ~ 850 km/s, implies MDyn ~3x1012sin-2i CSIRO ATUC, Astro Issues

  10. Recent Science Highlights • First case of large-scale HI associated with an FRII • 2x109 MSun with ΔV ~ 850 km/s, implies MDyn ~3x1012sin-2i • HI bridge of 400 kpc to gas-rich companion • Smoking gun of past/ongoing merger/interaction CSIRO ATUC, Astro Issues

  11. Recent Science Highlights • The most accurate pulsar distance determination to date • LBA trigonometric parallax of this P-WD binary achieves 1% precision CSIRO ATUC, Astro Issues

  12. Recent Science Highlights • The most accurate pulsar distance determination to date • LBA trigonometric parallax of this P-WD binary achieves 1% precision • Parallax distance, together with binary period derivative yield competitive (with prospects for improvement) constraint on time variability of G • Ġ/G = -5 +/- 26 x 1013 yr-1 • Constraint on stochastic GWB amplitude (~1 x 10-14) from timing vs. parallax distances comparable to best current limits CSIRO ATUC, Astro Issues

  13. Recent Science Highlights • The highest velocity “water fountain” yet seen • Total velocity spread of ~ 400 km/s seen from the 32 H2O maser spots seen in Mopra and ATCA data CSIRO ATUC, Astro Issues

  14. Recent Science Highlights • The highest velocity “water fountain” yet seen • Total velocity spread of ~ 400 km/s seen from the 32 H2O maser spots seen in Mopra and ATCA data • Spots confined to 0.3 arcsec region with some hint of red/blue splitting, but no strong collimation • Orientation unclear, but possible seen nearly along jet axis • Source possibly in phase where AGB and early PN winds collide CSIRO ATUC, Astro Issues

  15. Mopra Surveys Meeting Outcomes Mopra Surveys Meeting: Monday, 3 Nov 2008 • Discussion of science drivers for major Mopra surveys • See links below for more info: http://www.narrabri.atnf.csiro.au/mopra/Survey/SurveyMeeting.html http://www.atnf.csiro.au/research/surveys/mopra/discussion/index.php • Identified need for three distinct surveys • 3-mm Survey (~115 GHz) to trace Galactic Structure • 3-mm Survey (~90 GHz) to trace the chemistry and physical parameters of high-density regions (contact: Jim Jackson) • 7-mm Survey (42-50 GHz) to trace dense Galactic Structure (contact: Andrew Walsh) • Pilot proposals submitted in each area in Dec 08 • Plans for full proposal submission for Dec 09 CSIRO ATUC, Astro Issues

  16. Astro support of ASKAP Large Surveys Look to “ASKAP Update” item for details • 38 EoIs with 354 unique authors received 15 Dec 08 • 27 invitations to submit Survey proposals by 15 June 09 ATNF Astro support for large surveys • Aim for 0.5 – 1 FTE of post-doc support of each major survey area (depending on co-funding) • First two post-doc positions (with co-funding from CSIRO OCE) now advertised (close of 30 June 09) • Mapping the HI Universe • Exploring the Magnetic Universe • Plan for at least 2 – 3 more in coming 12 months • Depends on continued success of co-funding drive • Open invitation to community for joint positions CSIRO ATUC, Astro Issues

  17. Single Dish / Synthesis Schools Shift to annual (rather than every 2 – 3 years) school with alternating emphasis on Synthesis / Single Dish techniques • “Single Dish” emphasis School 2009 at Parkes • Week of 21 September? • Mike Keith taking the lead on organization with support from Phil Edwards & RB CSIRO ATUC, Astro Issues

  18. CABB issues ATCA is first array to enter the ultra-wide-fractional bandwidth regime with CABB’s 2 x 2 GHz • Fantastic new science opportunities • New calibration and imaging challenges • Non-negligible source SED and Primary Beam changes across the band • Shift to casapy or ASKAP software ? CSIRO ATUC, Astro Issues

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