2018A&A...610L...6O


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET20:17:06

2018A&A...610L...6O - Astronomy and Astrophysics, volume 610, L6-6 (2018/2-1)

Unidentified emission features in the R Coronae Borealis star V854 Centauri.

OOSTRUM L.C., OCHSENDORF B.B., KAPER L. and TIELENS A.G.G.M.

Abstract (from CDS):

During its 2012 decline, the R Coronae Borealis star (RCB) V854 Cen was spectroscopically monitored with X-shooter on the ESO Very Large Telescope. The obscured optical and near-infrared spectrum exhibits many narrow and several broad emission features, as previously observed. The envelope is spatially resolved along the slit and allows for a detailed study of the circumstellar material. In this Letter, we report on the properties of a number of unidentified visual emission features (UFs), including the detection of a new feature at 8692Å. These UFs have been observed in the Red Rectangle (RR), but their chemical and physical nature is still a mystery. The previously known UFs behave similarly in the RR and in V854 Cen, but are not detected in six other observed RCBs. Some hydrogen might be required for the formation of their carrier(s). The λ8692 UF is present in all RCBs. Its carrier is likely of a carbonaceous molecular nature, presumably different from that of the other UFs.

Abstract Copyright: © ESO, 2018

Journal keyword(s): circumstellar matter - stars: individual: V854 Cen

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14346 1
2 HD 44179 pA* 06 19 58.2185496 -10 38 14.706068 9.51 9.33 9.02     B9Ib/II 705 0
3 V* DY Cen RC* 13 25 34.0847442636 -54 14 43.129740133     12.00     C-Hd/B5-6Ie 83 0
4 V* V854 Cen RC* 14 34 49.4088471574 -39 33 19.276531885   7.13       Ce 195 0
5 V* S Aps RC* 15 09 24.5362175909 -72 03 45.183589120 11.52 10.86 9.60     C 109 0
6 V* R CrB RC* 15 48 34.4147978750 +28 09 24.298218765 6.44 6.31 5.71 5.26 5.08 G0Iep 755 0
7 V* RT Nor RC* 16 24 18.6673601503 -59 20 38.565873502   11.34 10.60     R 70 0
8 V* RZ Nor RC* 16 32 41.66 -53 15 33.2     10.63     C-Hd 62 0
9 IRAS 16571-5011 RC* 17 01 01.4133486238 -50 15 34.898184890   18.93   12.67 14.01 ~ 4 0
10 V* V CrA RC* 18 47 32.3131482 -38 09 32.324962   10.67 8.30     R0 97 0

    Equat.    Gal    SGal    Ecl

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2019.11.17-20:17:06

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