A. N. Wilkins

Publications (6)4.9 Total impact

• Article: LMC point source classification in SAGE-Spec (Woods+, 2011)

  P ~M Woods, J ~M Oliveira, F Kemper, J ~T Loon, B ~A Sargent, M Matsuura, R Szczerba, K Volk, A ~A Zijlstra, G ~C Sloan, [......], I Soszynski, A ~K Speck, S Srinivasan, A ~G ~G ~M Tielens, E Aarle, S ~D Dyk, H Winckel, U ~P Vijh, B Whitney, A ~N Wilkins
  VizieR Online Data Catalog. 09/2011; 741:11597.
• Article: The SAGE‐Spec Spitzer Legacy programme: the life‐cycle of dust and gas in the Large Magellanic Cloud – Point source classification I

  Paul M. Woods, J. M. Oliveira, F. Kemper, J. Th. van Loon, B. A. Sargent, M. Matsuura, R. Szczerba, K. Volk, A. A. Zijlstra, G. C. Sloan, [......], I. Soszyński, A. K. Speck, S. Srinivasan, A. G. G. M. Tielens, E. van Aarle, S. D. Van Dyk, H. Van Winckel, Uma P. Vijh, B. Whitney, A. N. Wilkins
  [show abstract] [hide abstract]
  ABSTRACT: We present the classification of 197 point sources observed with the Infrared Spectrograph in the SAGE-Spec Legacy programme on the Spitzer Space Telescope. We introduce a decision-tree method of object classification based on infrared spectral features, continuum and spectral energy distribution shape, bolometric luminosity, cluster membership and variability information, which is used to classify the SAGE-Spec sample of point sources. The decision tree has a broad application to mid-infrared spectroscopic surveys, where supporting photometry and variability information are available. We use these classifications to make deductions about the stellar populations of the Large Magellanic Cloud and the success of photometric classification methods. We find 90 asymptotic giant branch (AGB) stars, 29 young stellar objects, 23 post-AGB objects, 19 red supergiants, eight stellar photospheres, seven background galaxies, seven planetary nebulae, two H ii regions and 12 other objects, seven of which remain unclassified.
  Monthly Notices of the Royal Astronomical Society 02/2011; 411(3):1597 - 1627. · 4.90 Impact Factor
• Article: SAGE-Spec Spitzer legacy program (Kemper+, 2010)

  F Kemper, P ~M Woods, V Antoniou, J -P Bernard, R ~D Blum, M ~L Boyer, J Chan, C -H ~R Chen, M Cohen, C Dijkstra, [......], A ~G ~G ~M Tielens, E Aarle, S ~D Dyk, J ~T Loon, H Winckel, U ~P Vijh, K Volk, B ~A Whitney, A ~N Wilkins, A ~A Zijlstra
  VizieR Online Data Catalog. 11/2010; 612:20683.
• Source

  Available from: Eric Lagadec

  Article: The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification I

  Paul M. Woods, J. M. Oliveira, F. Kemper, J. Th. van Loon, B. A. Sargent, M Matsuura, R. Szczerba, K. Volk, A. A. Zijlstra, G. C. Sloan, [......], I. Soszyński, A. K. Speck, S. Srinivasan, A. G. G. M. Tielens, E. van Aarle, S. D. Van Dyk, H. Van Winckel, Uma P. Vijh, B. Whitney, A. N. Wilkins
  [show abstract] [hide abstract]
  ABSTRACT: We present the classification of 197 point sources observed with the Infrared Spectrograph in the SAGE-Spec Legacy program on the Spitzer Space Telescope. We introduce a decision-tree method of object classification based on infrared spectral features, continuum and spectral energy distribution shape, bolometric luminosity, cluster membership, and variability information, which is used to classify the SAGE-Spec sample of point sources. The decision tree has a broad application to mid-infrared spectroscopic surveys, where supporting photometry and variability information are available. We use these classifications to make deductions about the stellar populations of the Large Magellanic Cloud and the success of photometric classification methods. We find 90 asymptotic giant branch (AGB) stars, 29 young stellar objects, 23 post-AGB objects, 19 red supergiants, eight stellar photospheres, seven background galaxies, seven planetary nebulae, two HII regions and 12 other objects, seven of which remain unclassified. Comment: (43 pages, 21 figures, 4 tables including one large table out of order; to be published in MNRAS)
  09/2010;
• Source

  Available from: Eric Lagadec

  Article: The SAGE-Spec Spitzer Legacy program: The life-cycle of dust and gas in the Large Magellanic Cloud

  F. Kemper, Paul M. Woods, V. Antoniou, J. -P. Bernard, R. D. Blum, M. L. Boyer, J. Chan, C. -H. R. Chen, M Cohen, C. Dijkstra, [......], A. G. G. M. Tielens, E. van Aarle, S. D. Van Dyk, J. Th. van Loon, H. Van Winckel, Uma P. Vijh, K. Volk, B. A. Whitney, A. N. Wilkins, A. A. Zijlstra
  [show abstract] [hide abstract]
  ABSTRACT: The SAGE-Spec Spitzer Legacy program is a spectroscopic follow-up to the SAGE-LMC photometric survey of the Large Magellanic Cloud carried out with the Spitzer Space Telescope. We present an overview of SAGE-Spec and some of its first results. The SAGE-Spec program aims to study the life cycle of gas and dust in the Large Magellanic Cloud, and to provide information essential to the classification of the point sources observed in the earlier SAGE-LMC photometric survey. We acquired 224.6 hours of observations using the InfraRed Spectrograph and the SED mode of the Multiband Imaging Photometer for Spitzer. The SAGE-Spec data, along with archival Spitzer spectroscopy of objects in the Large Magellanic Cloud, are reduced and delivered to the community. We discuss the observing strategy, the specific data reduction pipelines applied and the dissemination of data products to the scientific community. Initial science results include the first detection of an extragalactic "21 um" feature towards an evolved star and elucidation of the nature of disks around RV Tauri stars in the Large Magellanic Cloud. Towards some young stars, ice features are observed in absorption. We also serendipitously observed a background quasar, at a redshift of z~0.14, which appears to be host-less. Comment: 33 pages, 12 figures, 8 tables; accepted for publication by PASP
  04/2010;
• Source

  Available from: Eric Lagadec

  Article: The SAGE‐Spec Spitzer Legacy programme: the life‐cycle of dust and gas in the Large Magellanic Cloud–Point source classification I

  Paul M Woods, J M Oliveira, F Kemper, J Th Van Loon, B A Sargent, M Matsuura, R Szczerba, K Volk, A A Zijlstra, G C Sloan, [......], R D Blum, M Sewi Lo, D Riebel, B Shiao, C.-H R Chen, D Van Dyk, H Van Winckel, Uma P Vijh, B Whitney, A N Wilkins
  [show abstract] [hide abstract]
  ABSTRACT: We present the classification of 197 point sources observed with the Infrared Spectro-graph in the SAGE-Spec Legacy program on the Spitzer Space Telescope. We introduce a decision-tree method of object classification based on infrared spectral features, con-tinuum and spectral energy distribution shape, bolometric luminosity, cluster mem-bership, and variability information, which is used to classify the SAGE-Spec sample of point sources. The decision tree has a broad application to mid-infrared spectroscopic surveys, where supporting photometry and variability information are available. We use these classifications to make deductions about the stellar populations of the Large Magellanic Cloud and the success of photometric classification methods. We find 90 asymptotic giant branch (AGB) stars, 29 young stellar objects, 23 post-AGB objects, 19 red supergiants, eight stellar photospheres, seven background galaxies, seven plane-tary nebulae, two Hii regions and 12 other objects, seven of which remain unclassified.
  A. K. Speck Mon. Not. R. Astron. Soc. 01/2010; 15211813(000):2-34.