2003A&A...412..771J


Query : 2003A&A...412..771J

2003A&A...412..771J - Astronomy and Astrophysics, volume 412, 771-776 (2003/12-4)

Anomalously bright UV lines of Fe II as a probe of gas condensations in the vicinity of hot stars.

JOHANSSON S. and LETOKHOV V.S.

Abstract (from CDS):

Two UV lines of Fe II at 2507/2509Å are extremely bright in spatially resolved HST/STIS spectra of dense gas condensations (the so called Weigelt blobs) close to the central star of η Carinae. The lines also appear unresolved in HST/FOS spectra of the star AE And. Under normal conditions the lines should hardly be observable. Based on recent studies of the formation of the λλ2507/2509 lines as part of a radiative cycle driven by HLyα pumping and including stimulated emission we propose the possibility of using them as a probe of non-homogeneities in gas condensations located outside hot, massive stars.

Abstract Copyright:

Journal keyword(s): atomic processes - line: formation - radiation mechanisms: non-thermal - stars: individual: η Car, AE And

CDS comments: Blob B of eta Car = [HW88] B

Simbad objects: 4

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Number of rows : 4
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 SV* HV 4476 s*b 00 43 02.5144653408 +41 49 12.212124096 16.378 17.273 17.426 17.242 17.241 LBV 49 0
2 * eta Car Em* 10 45 03.5377808928 -59 41 04.051599720 6.37 7.03 6.48 4.90 4.41 OBepec 2326 0
3 EM* AS 373 Sy* 19 57 05.0166505224 +39 49 36.076143036     11.50   10.592 M6/8e 575 0
4 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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2022.05.25-08:10:31

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