The carnegie hubble program: The infrared leavitt law in IC 1613

Victoria Scowcroft, Wendy L. Freedman, Barry F. Madore, Andrew J. Monson, S. E. Persson, Mark Seibert, Jane R. Rigby, Jason Melbourne

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We have observed the dwarf galaxy IC 1613, at multiple epochs in the mid-infrared using Spitzer and contemporaneously in the near-infrared using the new FourStar near-infrared camera on Magellan. We have constructed Cepheid period-luminosity relations in the J, H, Ks, [3.6] and [4.5] bands and have used the run of their apparent distance moduli as a function of wavelength to derive the line-of-sight reddening and distance to IC 1613. Using a nine-band fit, we find E(B-V) = 0.05 ± 0.01 mag and an extinction-corrected distance modulus of μ0 = 24.29 ± 0.03statistical ± 0.03systematic mag. By comparing our multi-band and [3.6] distance moduli to results from the tip of the red giant branch and red clump distance indicators, we find that metallicity has no measurable effect on Cepheid distances at 3.6 μm in the metallicity range -1.0 ≤ [Fe/H] ≤ 0.2, hence derivations of the Hubble constant at this wavelength require no correction for metallicity.

Original languageEnglish (US)
Article number106
JournalAstrophysical Journal
Volume773
Issue number2
DOIs
StatePublished - Aug 20 2013

Fingerprint

near infrared
wavelength
metallicity
extinction
Hubble constant
clumps
dwarf galaxies
wavelengths
line of sight
programme
derivation
cameras
luminosity
time measurement
effect
indicator

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Scowcroft, V., Freedman, W. L., Madore, B. F., Monson, A. J., Persson, S. E., Seibert, M., ... Melbourne, J. (2013). The carnegie hubble program: The infrared leavitt law in IC 1613. Astrophysical Journal, 773(2), [106]. https://doi.org/10.1088/0004-637X/773/2/106
Scowcroft, Victoria ; Freedman, Wendy L. ; Madore, Barry F. ; Monson, Andrew J. ; Persson, S. E. ; Seibert, Mark ; Rigby, Jane R. ; Melbourne, Jason. / The carnegie hubble program : The infrared leavitt law in IC 1613. In: Astrophysical Journal. 2013 ; Vol. 773, No. 2.
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Scowcroft, V, Freedman, WL, Madore, BF, Monson, AJ, Persson, SE, Seibert, M, Rigby, JR & Melbourne, J 2013, 'The carnegie hubble program: The infrared leavitt law in IC 1613', Astrophysical Journal, vol. 773, no. 2, 106. https://doi.org/10.1088/0004-637X/773/2/106

The carnegie hubble program : The infrared leavitt law in IC 1613. / Scowcroft, Victoria; Freedman, Wendy L.; Madore, Barry F.; Monson, Andrew J.; Persson, S. E.; Seibert, Mark; Rigby, Jane R.; Melbourne, Jason.

In: Astrophysical Journal, Vol. 773, No. 2, 106, 20.08.2013.

Research output: Contribution to journalArticle

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Scowcroft V, Freedman WL, Madore BF, Monson AJ, Persson SE, Seibert M et al. The carnegie hubble program: The infrared leavitt law in IC 1613. Astrophysical Journal. 2013 Aug 20;773(2). 106. https://doi.org/10.1088/0004-637X/773/2/106