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[ZLINE] Halpha is bimodale #16

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londumas opened this issue Jan 30, 2019 · 1 comment
Open

[ZLINE] Halpha is bimodale #16

londumas opened this issue Jan 30, 2019 · 1 comment
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londumas commented Jan 30, 2019 •
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ZLINE: Halpha is bimodale.

dv_vs_zvi_halpha_dr16qzvi

dv_histo_halpha_dr16qzvi

[edit] Using DR16Q:Z_VI
@londumas londumas added the bug Something isn't working label Jan 30, 2019
@londumas londumas self-assigned this Jan 30, 2019
@londumas londumas changed the title ZLINE: Halpha is bimodale [ZLINE] Halpha is bimodale Feb 1, 2019
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londumas commented Feb 1, 2019

The bump at dv~1000 km/s is when the spectrum is more galaxy like, e.g. 4235554510758: https://dr12.sdss.org/optical/spectrum/view. Then the fit is unable to get the broad emission line and the higher lines get switch to [NII]λ6585 (https://arxiv.org/pdf/1507.07979.pdf). It shows that we need to rerun the PCA to get these objects back.

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