Journal article
X-rays from Green Pea Analogs
Monthly notices of the Royal Astronomical Society, Vol.470(1), pp.606-611
05/22/2017
DOI: 10.1093/mnras/stx1286
Abstract
X-ray observations of two metal-deficient luminous compact galaxies (LCG)
(SHOC~486 and SDSS J084220.94+115000.2) with properties similar to the
so-called Green Pea galaxies were obtained using the {\emph{Chandra X-ray
Observatory}}. Green Pea galaxies are relatively small, compact (a few kpc
across) galaxies that get their green color from strong [OIII]$\lambda$5007\AA\
emission, an indicator of intense, recent star formation. These two galaxies
were predicted to have the highest observed count rates, using the X-ray
luminosity -- star formation rate ($L_X$--SFR) relation for X-ray binaries,
from a statistically complete sample drawn from optical criteria. We determine
the X-ray luminosity relative to star-formation rate and metallicity for these
two galaxies. Neither exhibit any evidence of active galactic nuclei and we
suspect the X-ray emission originates from unresolved populations of high mass
X-ray binaries. We discuss the $L_X$--SFR--metallicity plane for star-forming
galaxies and show that the two LCGs are consistent with the prediction of this
relation. This is the first detection of Green Pea analogs in X-rays.
Details
- Title: Subtitle
- X-rays from Green Pea Analogs
- Creators
- Matthew Brorby - University of IowaPhilip Kaaret - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Monthly notices of the Royal Astronomical Society, Vol.470(1), pp.606-611
- DOI
- 10.1093/mnras/stx1286
- ISSN
- 0035-8711
- eISSN
- 1365-2966
- Publisher
- Oxford University Press
- Language
- English
- Date published
- 05/22/2017
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984199733402771
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