STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY

Joner, Michael D.

doi:10.1088/0004-6256/150/6/204

Title: STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY

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Abstract

We define an Hα photometric system that is designed as a companion to the well established Hβ index. The new system is built on spectrophotometric observations of field stars as well as stars in benchmark open clusters. We present data for 75 field stars, 12 stars from the Coma star cluster, 24 stars from the Hyades, 17 stars from the Pleiades, and 8 stars from NGC 752 to be used as primary standard stars in the new systems. We show that the system transformations are relatively insensitive to the shape of the filter functions. We make comparisons of the Hα index to the Hβ index and illustrate the relationship between the two systems. In addition, we present relations that relate both hydrogen indices to equivalent width and effective temperature. We derive equations to calibrate both systems for Main Sequence stars with spectral types in the range O9 to K2 for equivalent width and A2 to K2 for effective temperature.

Authors:: Joner, Michael D.

Publication Date:: Tue Dec 15 00:00:00 EST 2015

OSTI Identifier:: 22520048

Resource Type:: Journal Article

Journal Name:: Astronomical Journal (Online)

Additional Journal Information:: Journal Volume: 150; Journal Issue: 6; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BENCHMARKS; CALIBRATION; COMPARATIVE EVALUATIONS; HYDROGEN; MAIN SEQUENCE STARS; PHOTOMETRY; SPECTROPHOTOMETRY; STAR CLUSTERS

Citation Formats


                    Joner, Michael D., and Hintz, Eric G., E-mail: joner@byu.edu, E-mail: hintz@byu.edu. STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY.  United States: N. p., 2015. 
        Web.  doi:10.1088/0004-6256/150/6/204.

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                    Joner, Michael D., & Hintz, Eric G., E-mail: joner@byu.edu, E-mail: hintz@byu.edu. STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY.  United States.  https://doi.org/10.1088/0004-6256/150/6/204

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                    Joner, Michael D., and Hintz, Eric G., E-mail: joner@byu.edu, E-mail: hintz@byu.edu. 2015.  
        "STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY".  United States.  https://doi.org/10.1088/0004-6256/150/6/204.

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@article{osti_22520048,

  title        = {STANDARD STARS AND EMPIRICAL CALIBRATIONS FOR Hα AND Hβ PHOTOMETRY},

  author       = {Joner, Michael D. and Hintz, Eric G., E-mail: joner@byu.edu, E-mail: hintz@byu.edu},

  abstractNote = {We define an Hα photometric system that is designed as a companion to the well established Hβ index. The new system is built on spectrophotometric observations of field stars as well as stars in benchmark open clusters. We present data for 75 field stars, 12 stars from the Coma star cluster, 24 stars from the Hyades, 17 stars from the Pleiades, and 8 stars from NGC 752 to be used as primary standard stars in the new systems. We show that the system transformations are relatively insensitive to the shape of the filter functions. We make comparisons of the Hα index to the Hβ index and illustrate the relationship between the two systems. In addition, we present relations that relate both hydrogen indices to equivalent width and effective temperature. We derive equations to calibrate both systems for Main Sequence stars with spectral types in the range O9 to K2 for equivalent width and A2 to K2 for effective temperature.},

  doi          = {10.1088/0004-6256/150/6/204},

  url          = {https://www.osti.gov/biblio/22520048},
  journal      = {Astronomical Journal (Online)},

  issn         = {1538-3881},

  number       = 6,

  volume       = 150,

  place        = {United States},

  year         = {Tue Dec 15 00:00:00 EST 2015},

  month        = {Tue Dec 15 00:00:00 EST 2015}

}

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https://doi.org/10.1088/0004-6256/150/6/204

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