2002A&A...384..568V


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.29CEST21:30:03

2002A&A...384..568V - Astronomy and Astrophysics, volume 384, 568-584 (2002/3-3)

Nanodiamonds around HD 97048 and Elias 1.

VAN KERCKHOVEN C., TIELENS A.G.G.M. and WAELKENS C.

Abstract (from CDS):

We present an analysis of ISO-SWS observations of the Herbig Ae/Be stars HD 97048 and Elias 1. Besides the well-known family of IR emission bands at 3.3, 6.2, ``7.7'', 8.6 and 11.2µm these objects show strong, peculiar emission features at 3.43 and 3.53µm. The latter two features show pronounced substructure which is very similar in the two sources. Comparison of the spectra of HD 97048 and Elias 1 with laboratory spectra of H-terminated diamond surfaces show excellent and very convincing agreement in peak position and spectral detail (Guillois et al., 1999ApJ...521L.133G). The position of the 3.53µm band indicates a temperature of ∼1000 K. An analysis of the radiative energy budget makes us conclude that the diamond carrier of the 3.53µm feature has typical sizes of 1-10 nm for HD 97048. A fit of the 3.53µm feature with a theoretical, calculated profile indicates that the emitting diamonds in HD 97048 see a FUV flux of 5.8x10–3[W/cm2]. The derived diamond mass, 1.5x10–10M, is only a tiny fraction of the total circumstellar dust mass and corresponds to only about 1 parts per billion relative to hydrogen. We discuss the origin of the diamond around these Herbig Ae/Be stars and conclude that most likely they are formed in situ. The implications for the nanodiamonds discovered in meteorites are also discussed.

Abstract Copyright:

Journal keyword(s): circumstellar matter - infrared: ISM: lines and bands - ISM: general - ISM: molecules, dust - ISM: individual: HD 97048, Elias 1

Status at CDS:  

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 V* V892 Tau Ae* 04 18 40.6120892867 +28 19 15.641672501   16.6 14.69 14.35   A0Ve 261 1
2 IRAS 05341+0852 pA* 05 36 55.0500719686 +08 54 08.646055747   15.37 13.45 12.95 11.43 F6I 105 0
3 V* PS Gem pA* 07 03 39.6306725638 +10 46 13.076555664   7.76 7.37     A0 105 0
4 HD 89353 pA* 10 18 07.5892879413 -28 59 31.194541133   5.76 5.53     B9.5Ib/II 286 0
5 NAME Cha T Association As* 11 08 -77.0           ~ 40 1
6 HD 97048 Ae* 11 08 03.3105687971 -77 39 17.491180130 9.03 8.76 9.00   8.64 A0Vep 450 0
7 HD 100546 Be* 11 33 25.4404858122 -70 11 41.239343121   6.71 6.30   6.64 A0VaekB8_lB 636 1
8 Ass Cha T 2 As* 13 00 -77.0           ~ 18 1
9 HD 142527 Ae* 15 56 41.8888096574 -42 19 23.245384377   9.04 8.34     F6III 447 1
10 [D75b] Em* 21-021 PN 21 29 58.4712776885 +51 04 00.323547316   15.66 14.20 13.89   O7(f)/[WC11] 226 0

    Equat.    Gal    SGal    Ecl

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2020.03.29-21:30:03

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