by JohnD » Mon Mar 08, 2021 10:48 am
Thank you, Holger Neilsen, you got ahead of me!
The abstract of the paper linked to,
https://ui.adsabs.harvard.edu/abs/2020D ... Y/abstract by Ye, Zang, Brewer et al, says , "Strong sodium and potassium lines are also present. We also detect H2O+ lines in the visible-red wavelength (5800 to 7400 Ang), though they are much weaker than the sodium line, suggesting that the red straight tail reported by numerous observers in mid-July was likely dominated by sodium atoms rather than H2O+ ions." and that they did not detect any Lithium, which might produce red light. Red light, from sodium?
Thank you Ann too, but that picture shows clearly red, not yellow, whatever astronomers call it!
And what is "H2O+"? A water molecule that is short of one electron, clearly, so has a positive charge. But that electron is what ties one of the hydrogens to the oxygen, so why isn't it HO+. with a free proton flying off?
And the 'mouse-over' describes the red tail as being due to "Neutral" sodium atoms. So, not charged, and not capable of photo emission, which I thought occured as electrons moved back into their orbitals, after beingn removed ?
John, even more confused than usual.
Thank you, Holger Neilsen, you got ahead of me!
The abstract of the paper linked to, https://ui.adsabs.harvard.edu/abs/2020DPS....5211102Y/abstract by Ye, Zang, Brewer et al, says , "Strong sodium and potassium lines are also present. We also detect H2O+ lines in the visible-red wavelength (5800 to 7400 Ang), though they are much weaker than the sodium line, suggesting that the red straight tail reported by numerous observers in mid-July was likely dominated by sodium atoms rather than H2O+ ions." and that they did not detect any Lithium, which might produce red light. Red light, from sodium?
Thank you Ann too, but that picture shows clearly red, not yellow, whatever astronomers call it!
And what is "H2O+"? A water molecule that is short of one electron, clearly, so has a positive charge. But that electron is what ties one of the hydrogens to the oxygen, so why isn't it HO+. with a free proton flying off?
And the 'mouse-over' describes the red tail as being due to "Neutral" sodium atoms. So, not charged, and not capable of photo emission, which I thought occured as electrons moved back into their orbitals, after beingn removed ?
John, even more confused than usual.