1996A&A...315L.245W

Query : 1996A&A...315L.245W

1996A&A...315L.245W - Astronomy and Astrophysics, volume 315L245-248 (1996/11-2)

SWS observations of young main-sequence stars with dusty circumstellar disks.

WAELKENS C., WATERS L.B.F.M., DE GRAAUW M.S., HUYGEN E., MALFAIT K., PLETS H., VANDENBUSSCHE B., BEINTEMA D.A., BOXHOORN D.R., HABING H.J., HERAS A.M., KESTER D.J.M., LAHUIS F., MORRIS P.W., ROELFSEMA P.R., SALAMA A., SIEBENMORGEN R., TRAMS N.R., VAN DER BLIEK N.S., VALENTIJN E.A. and WESSELIUS P.R.

Abstract (from CDS):

We present SWS full-scan observations of three objects that are thought to be in a stage of evolution between the youngest, embedded, Herbig Ae/Be stars and Beta Pictoris, a young main-sequence star with a circumstellar disk. The 8-12µm spectra of all three stars cannot be understood in terms of purely amorphous silicates, but require the presence of crystalline silicates in different amounts. Around two objects both oxygen-rich and carbon-rich dust particles are present: the spectrum of HD 100546 displays the full set of UIR features; in the spectrum of HD 142527 both the 3.29 and 3.42µm emission features are observed, as well as a strong 3.51µm feature. The spectrum of HD 100546 is extremely rich in silicate features in the spectral range from 20 to 45µm; some of these features strongly suggest the presence of appreciable amounts of crystalline silicates.

Abstract Copyright: ∼

Journal keyword(s): Circumstellar matter - stars: individual: HD 100546 - stars: individual: HD 142527 - stars: individual: 51 Oph - ISM: abundances - Infrared: ISM: lines and bands

CDS comments: Elia 1 = Elia 3-1

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 324 0
2 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 2087 1
3 V* PS Gem pA* 07 03 39.6305052432 +10 46 13.068774048   7.76 7.37     A0 130 0
4 HD 89353 pA* 10 18 07.5899342712 -28 59 31.195183524   5.76 5.53     B9.5Ib/II 315 0
5 HD 97048 Ae* 11 08 03.3109731720 -77 39 17.490777444 9.03 8.76 9.00   8.64 A0Vep 590 0
6 HD 100546 Be* 11 33 25.4408872296 -70 11 41.241297948   6.71 6.30   6.64 A0VaekB8_lB 894 1
7 HD 109573 TT* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774   5.81 A0V 684 1
8 HD 142527 Ae* 15 56 41.8882637904 -42 19 23.248281828   9.04 8.34     F6III 741 1
9 * c Oph Be* 17 31 24.9538710166 -23 57 45.514802684 4.75 4.81 4.81 4.74 4.72 A0V 284 0

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