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1. A HERSCHEL SURVEY OF THE [N II] 205 μm LINE IN LOCAL LUMINOUS INFRARED GALAXIES: THE [N II] 205 μm EMISSION AS A STAR FORMATION RATE INDICATOR

Author

P. van der Werf, C. Kevin Xu, D. B. Sanders, Jason Surace, K. Iwasawa, Yinghe Zhao, Yu Gao, K. G. Isaak, V. Charmandaris, Nanyao Lu, J. H. Howell, Tanio Díaz-Santos, S. D. Lord, P. N. Appleton, Jamie Leech, A. Evans, Benjamin L. Schulz, Andreea Petric, J. Mazzarella, NASA Herschel Science Center, NASA-California Institute of Technology (CALTECH), Institut de Planétologie et d'Astrophysique de Grenoble (IPAG ), Observatoire des Sciences de l'Univers de Grenoble (OSUG), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), School of Physics and Astronomy [Cardiff], Cardiff University, Observatoire de Paris, Université Paris sciences et lettres (PSL), Universidad Diego Portales [Santiago] (UDP), Infrared Processing and Analysis Center (IPAC), California Institute of Technology (CALTECH), iROc Technologies (IROC TECHNOLOGIES), Cadence Connection-EDA Consortium-FSA-Cubic Micro, Dipartimento di Astronomia, Universita degli Studi di Bologna, Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), AUTRES, Leiden Observatory [Leiden], and Universiteit Leiden [Leiden]

Subjects
Luminous infrared galaxy, Physics, [PHYS]Physics [physics], Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Infrared, Doubly ionized oxygen, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Submillimeter Array, Redshift, Galaxy, Luminosity, Far infrared, Space and Planetary Science, 0103 physical sciences, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present, for the first time, a statistical study of [N II] 205 mciron line emission for a large sample of local luminous infrared galaxies using Herschel Spectral and Photometric Imaging Receiver Fourier Transform Spectrometer (SPIRE FTS) data. For our sample of galaxies, we investigate the correlation between the [N II] luminosity (LNII) and the total infrared luminosity (LIR), as well as the dependence of LNII/LIR ratio on LIR, far infrared colors (IRAS $f_{60}/f_{100}$) and the [O III] 88 micron to [N II] luminosity ratio. We find that LNII correlates almost linearly with LIR for non AGN galaxies (all having $L_{IR} < 10^{12} L_solar$) in our sample, which implies that LNII can serve as a SFR tracer which is particularly useful for high redshift galaxies which will be observed with forthcoming submm spectroscopic facilities such as the Atacama Large Millimeter/submillimeter Array. Our analysis shows that the deviation from the mean LNII-LIR relation correlates with tracers of the ionization parameter, which suggests the scatter in this relation is mainly due to the variations in the hardness, and/or ionization parameter, of the ambient galactic UV field among the sources in our sample., 6 emulateapj pages, 3 figures; ApJ Letter accepted

Published
2013
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2. Status of the SPIRE photometer data processing pipelines during the early phases of the Herschel Mission

Author

B. O'Halloran, Marc Ferlet, Louis Levenson, James J. Bock, Adam Woodcraft, Tanya Lim, Seb Oliver, George J. Bendo, Bruce Swinyard, Pierre Chanial, Bruce Sibthorpe, C. Kevin Xu, David L. Shupe, Hien Nguyen, Helene Roussel, David L. Clements, Huw R. Morris, Ken J. King, Michael Pohlen, Lijun Zhang, C. Darren Dowell, Edward Polehampton, Dominique Benielli, Matthew Joseph Griffin, R. Gastaud, Sarah Leeks, S. Guest, Bernhard Schulz, Jason Glenn, Nanyao Lu, Luca Conversi, Sunil Sidher, Ivan Valtchanov, Markos Trichas, Anthony J. Smith, Arnold A. Schwartz, Trevor Fulton, Nicola Schneider, Pasquale Panuzzo, Tim Grundy, Andreas Papageorgiou, Chris Pearson, Dimitra Rigopoulou, Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Oschmann, Jacobus M., Clampin, Mark C., and MacEwen, Howard A.

Subjects
Physics, Data processing, business.industry, Point source, Detector, Photometer, 01 natural sciences, law.invention, 010309 optics, Photometry (optics), Telescope, Optics, Cardinal point, law, 0103 physical sciences, [INFO]Computer Science [cs], Ground segment, business, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, ComputingMilieux_MISCELLANEOUS, Remote sensing
Abstract

We describe the current state of the ground segment of Herschel-SPIRE photometer data processing, approximately one year into the mission. The SPIRE photometer operates in two modes: scan mapping and chopped point source photometry. For each mode, the basic analysis pipeline - which follows in reverse the effects from the incidence of light on the telescope to the storage of samples from the detector electronics - is essentially the same as described pre-launch. However, the calibration parameters and detailed numerical algorithms have advanced due to the availability of commissioning and early science observations, resulting in reliable pipelines which produce accurate and sensitive photometry and maps at 250, 350, and 500 μm with minimal residual artifacts. We discuss some detailed aspects of the pipelines on the topics of: detection of cosmic ray glitches, linearization of detector response, correction for focal plane temperature drift, subtraction of detector baselines (offsets), absolute calibration, and basic map making. Several of these topics are still under study with the promise of future enhancements to the pipelines.

Published
2010
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