1998A&A...340L..15P


Query : 1998A&A...340L..15P

1998A&A...340L..15P - Astronomy and Astrophysics, volume 340, L15-17 (1998/12-1)

The OV 1213.9A forbidden line in the quiet Sun.

PINFIELD D.J., MATHIOUDAKIS M., KEENAN F.P., PHILLIPS K.J.H. and CURDT W.

Abstract (from CDS):

We present the first unambiguous detection of the OV 1213.9Å (2s2 1S0 -> 2s2p 3P2) forbidden line in the solar spectrum, using observations obtained with the SUMER instrument on board SOHO. The wavelength separation of the forbidden to the (2s2 1S0 -> 2s2p 3P1) intercombination line at 1218.35Å is 4.5±0.1Å in excellent agreement with theoretical predictions. The observed line ratio, combined with the latest calculations, allows us to derive an electron density of logNe/cm–3=8.5±0.15 for the quiet Sun. However, the OV 1213.9Å line was not detected in the HST spectra of Procyon and we can only place a lower limit of logNe/cm–3≥7.8 to the electron density in this object.

Abstract Copyright:

Journal keyword(s): atomic data - line identification - Sun: chromosphere - Sun: corona - stars: individual: procyon

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 * alf CMi SB* 07 39 18.11950 +05 13 29.9552 0.82 0.79 0.37 -0.05 -0.28 F5IV-V+DQZ 1820 0
2 V* RR Tel Sy* 20 04 18.5404499712 -55 43 33.153979080 9.93 11.33 10.81 11.689   M5e 527 0

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2022.05.27-14:06:03

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