Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-08-21
Astronomy and Astrophysics
Astrophysics
To appear in ASP Conference Series as proceedings of NRAO 50th Anniversary Symposium, "Frontiers of Astrophysics", June 18-21,
Scientific paper
We only see a small fraction of the matter in the universe, but the rest gives itself away by the impact of its gravity. Peculiar velocities have the potential to be a powerful tool to trace this matter however previous peculiar velocity surveys have struggled to meet their potential because of the large errors on individual measurements, poor statistics and uneven sky coverage. The 2MASS Tully-Fisher (2MTF) survey will make use of existing high quality rotations widths, new HI widths and 2MASS (2 Micron All-Sky Survey) photometry to measure Tully-Fisher distances/peculiar velocities for all bright inclined spirals in the 2MASS redshift survey (2MRS). This survey based on the 2MASS galaxy catalog will provide a qualitatively better sample. It will provide significant improvements in sky coverage especially near the plane of our Galaxy which crosses the poorly understood "great attractor" region. I will give a progress report on the 2MTF survey including a look at over 300 hours of HI observations from the Green Bank Telescope (GBT) and a report on ongoing southern hemisphere observations with the Parke s Radio Telescope. The new spiral I-band field (SFI++) sample is currently the best available peculiar velocity survey for use in the local universe. I will also report on some preliminary results from this sample.
No associations
LandOfFree
Mapping Mass in the Local Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mapping Mass in the Local Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mapping Mass in the Local Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-135328