Talk:Calcium monohydride

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Detectable presence in other stars.

The paper referenced in "Next it was found in other stars by Y Ohman.^[1]" leads to these articles by Ohman, Eagle, and Olmsted in the introduction, but I see no explicit mention of calcium in Ohman, let alone CaH. Eagle's paper only references Olmstead, and doesn't mention CaH otherwise. Olmsted seems to be the only relevant article... from 1908. Other adsabs searches for CaH and calcium monohydride bring up no stellar or ISM detections.

If no other sources are available, references to extrasolar detections should be removed, and if no other references are available for solar detections other than Olmsted's, those should be removed as well. -- Tom.Reding
17:35, 1 December 2014 (UTC)

The first ExoMol paper has a decent section (1.3) on the importance of CaH in astronomical objects. It's definitely present in cool stars, but it's less clear if there are interstellar detections and I don't have time to chase up those references. They're worth checking though! Modest Genius ^talk 23:23, 1 December 2014 (UTC)[reply]

I rushed this page out without doing much research to get a proper picture of CaH in stars, so you can be sure there are better references around. But the statements have been derived from the references given. Graeme Bartlett (talk) 03:57, 3 December 2014 (UTC)[reply]

Excellent paper Modest Genius! Yadin references Ohman as well - the relevant article being from 1934 instead of 1935. CaH acts similarly to MgH in metal richish+ stars as a surface gravity indicator. I'll incorporate those references on the CaH page in the near future. As usual, I should've searched adsabs for calcium hydride instead of monohydride... Much more productive. -- Tom.Reding
14:30, 3 December 2014 (UTC)

Calcium hydride would be CaH₂ as termed by chemists. The astronomers almost always call this CaH. Graeme Bartlett (talk) 14:24, 7 December 2014 (UTC)[reply]

Damn astronomers. ~ Tom.Reding (talk|contribs|dgaf) 15:26, 17 December 2014 (UTC)[reply]

References

^ Frum, C.I.; H.M. Pickett (1993). "High-Resolution Infrared Fourier Transform Emission Spectroscopy of Metal Hydrides: X2Σ+ state of CaH". Journal of Molecular Spectroscopy. 159 (2): 329–336. doi:10.1006/jmsp.1993.1130. ISSN 0022-2852.

Projects

I added this to the Chemistry project, but Christian75 changed it to chemicals. This is not a "chemical" that you can purchase in a bottle, but an unstable gas. Should that be in the Chemicals Project? Graeme Bartlett (talk) 14:24, 7 December 2014 (UTC)[reply]

[Frum1993-1] Frum, C.I.; H.M. Pickett (1993). "High-Resolution Infrared Fourier Transform Emission Spectroscopy of Metal Hydrides: X2Σ+ state of CaH". Journal of Molecular Spectroscopy. 159 (2): 329–336. doi:10.1006/jmsp.1993.1130. ISSN 0022-2852.

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