publication . Article . Other literature type . Preprint . 2018

Detecting Weak Spectral Lines in Interferometric Data through Matched Filtering

Ryan A. Loomis; Karin I. Öberg; Sean M. Andrews; Catherine Walsh; Ian Czekala; Jane Huang; Katherine A. Rosenfeld;
Open Access English
  • Published: 05 Apr 2018
  • Publisher: American Astronomical Society
  • Country: United Kingdom
Abstract
Modern radio interferometers enable observations of spectral lines with unprecedented spatial resolution and sensitivity. In spite of these technical advances, many lines of interest are still at best weakly detected and therefore necessitate detection and analysis techniques specialized for the low signal-to-noise ratio (SNR) regime. Matched filters can leverage knowledge of the source structure and kinematics to increase sensitivity of spectral line observations. Application of the filter in the native Fourier domain improves SNR while simultaneously avoiding the computational cost and ambiguities associated with imaging, making matched filtering a fast and ro...
Subjects
free text keywords: Astrophysics - Instrumentation and Methods for Astrophysics, Space and Planetary Science, Astronomy and Astrophysics, Spectral line, Physics, Algorithm, Interferometry, Filter (signal processing), Astrophysics, Fourier transform, symbols.namesake, symbols, Matched filter, Astronomical interferometer, Image resolution, Aperture
Funded by
NSF| Graduate Research Fellowship Program (GRFP)
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1144152
  • Funding stream: Directorate for Education & Human Resources | Division of Graduate Education
,
NWO| From Molecules to Planets: Exploring the Chemical Heritage of Solar Systems
Project
  • Funder: Netherlands Organisation for Scientific Research (NWO) (NWO)
  • Project Code: 2300180727
62 references, page 1 of 5

Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2016, Physical Review Letters, 116, 061102

Andrews, S. M., Wilner, D. J., Hughes, A. M., et al. 2012, ApJ, 744, 162

Astropy Collaboration, Robitaille, T. P., Tollerud, E. J., et al. 2013, A&A, 558, A33

Barenfeld, S. A., Carpenter, J. M., Ricci, L., & Isella, A. 2016, ApJ, 827, 142

Bertin, E. 2001, in Mining the Sky, ed. A. J. Banday, S. Zaroubi, & M. Bartelmann, 353

Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393

Briggs, D. S. 1995, in Bulletin of the American

Astronomical Society, Vol. 27, American Astronomical

Society Meeting Abstracts, 1444

Brinch, C., & Hogerheijde, M. R. 2010, A&A, 523, A25

2017, ArXiv e-prints, arXiv:1705.10188

Crane, P. C., & Napier, P. J. 1986, in Synthesis Imaging, ed. R. A. Perley, F. R. Schwab, & A. H. Bridle, 87{108

Cumming, I. G., & Wong, F. H. 2005, Artech house, 1, 3

Cuppen, H. M., van Dishoeck, E. F., Herbst, E., & Tielens, A. G. G. M. 2009, A&A, 508, 275

Czekala, I. 2016, DiskJockey: Protoplanetary disk modeling for dynamical mass derivation, Astrophysics Source Code Library, , , ascl:1603.011 [OpenAIRE]

62 references, page 1 of 5
Abstract
Modern radio interferometers enable observations of spectral lines with unprecedented spatial resolution and sensitivity. In spite of these technical advances, many lines of interest are still at best weakly detected and therefore necessitate detection and analysis techniques specialized for the low signal-to-noise ratio (SNR) regime. Matched filters can leverage knowledge of the source structure and kinematics to increase sensitivity of spectral line observations. Application of the filter in the native Fourier domain improves SNR while simultaneously avoiding the computational cost and ambiguities associated with imaging, making matched filtering a fast and ro...
Subjects
free text keywords: Astrophysics - Instrumentation and Methods for Astrophysics, Space and Planetary Science, Astronomy and Astrophysics, Spectral line, Physics, Algorithm, Interferometry, Filter (signal processing), Astrophysics, Fourier transform, symbols.namesake, symbols, Matched filter, Astronomical interferometer, Image resolution, Aperture
Funded by
NSF| Graduate Research Fellowship Program (GRFP)
Project
  • Funder: National Science Foundation (NSF)
  • Project Code: 1144152
  • Funding stream: Directorate for Education & Human Resources | Division of Graduate Education
,
NWO| From Molecules to Planets: Exploring the Chemical Heritage of Solar Systems
Project
  • Funder: Netherlands Organisation for Scientific Research (NWO) (NWO)
  • Project Code: 2300180727
62 references, page 1 of 5

Abbott, B. P., Abbott, R., Abbott, T. D., et al. 2016, Physical Review Letters, 116, 061102

Andrews, S. M., Wilner, D. J., Hughes, A. M., et al. 2012, ApJ, 744, 162

Astropy Collaboration, Robitaille, T. P., Tollerud, E. J., et al. 2013, A&A, 558, A33

Barenfeld, S. A., Carpenter, J. M., Ricci, L., & Isella, A. 2016, ApJ, 827, 142

Bertin, E. 2001, in Mining the Sky, ed. A. J. Banday, S. Zaroubi, & M. Bartelmann, 353

Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393

Briggs, D. S. 1995, in Bulletin of the American

Astronomical Society, Vol. 27, American Astronomical

Society Meeting Abstracts, 1444

Brinch, C., & Hogerheijde, M. R. 2010, A&A, 523, A25

2017, ArXiv e-prints, arXiv:1705.10188

Crane, P. C., & Napier, P. J. 1986, in Synthesis Imaging, ed. R. A. Perley, F. R. Schwab, & A. H. Bridle, 87{108

Cumming, I. G., & Wong, F. H. 2005, Artech house, 1, 3

Cuppen, H. M., van Dishoeck, E. F., Herbst, E., & Tielens, A. G. G. M. 2009, A&A, 508, 275

Czekala, I. 2016, DiskJockey: Protoplanetary disk modeling for dynamical mass derivation, Astrophysics Source Code Library, , , ascl:1603.011 [OpenAIRE]

62 references, page 1 of 5
Powered by OpenAIRE Open Research Graph
Any information missing or wrong?Report an Issue
publication . Article . Other literature type . Preprint . 2018

Detecting Weak Spectral Lines in Interferometric Data through Matched Filtering

Ryan A. Loomis; Karin I. Öberg; Sean M. Andrews; Catherine Walsh; Ian Czekala; Jane Huang; Katherine A. Rosenfeld;