2004A&A...419..301M


Query : 2004A&A...419..301M

2004A&A...419..301M - Astronomy and Astrophysics, volume 419, 301-318 (2004/5-3)

Study of the properties and spectral energy distributions of the Herbig AeBe stars HD 34282 and HD 141569.

MERIN B., MONTESINOS B., EIROA C., SOLANO E., MORA A., D'ALESSIO P., CALVET N., OUDMAIJER R.D., DE WINTER D., DAVIES J.K., HARRIS A.W., CAMERON A., DEEG H.J., FERLET R., GARZON F., GRADY C.A., HORNE K., MIRANDA L.F., PALACIOS J., PENNY A., QUIRRENBACH A., RAUER H., SCHNEIDER J. and WESSELIUS P.R.

Abstract (from CDS):

We present a study of the stellar parameters, distances and spectral energy distributions (SEDs) of HD 34282 and HD 141569, two pre-main sequence Herbig AeBe stars. Both objects have been reported to show ``anomalous positions'' in the HR diagram in the sense that they appear below the main sequence. A significant result of this work is that both stars are metal-deficient. The Hipparcos distance of HD 34282 is very uncertain and the current study places the star at the expected evolutionary position in the HR diagram, i.e. as a PMS star. The distance for HD 141569 found in this work matches the Hipparcos distance, and the problem of its anomalous position is solved as a result of the low metallicity of the object: using the right metallicity tracks, the star is in the PMS region. The SEDs are constructed using data covering ultraviolet to millimetre wavelengths. Physical, non-parametric models, have been applied in order to extract some properties of the disks surrounding the stars. The disk around HD 34282 is accreting actively, it is massive and presents large grains in the mid-plane and small grains in the surface. HD 141569 has a very low mass disk, which is in an intermediate stage towards a debris-type disk.

Abstract Copyright:

Journal keyword(s): stars: pre-main sequence - stars: fundamental parameters - stars: planetary systems: protoplanetary disks

Simbad objects: 6

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Number of rows : 6
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 V* V1366 Ori Ae* 05 16 00.4765181328 -09 48 35.393784012 10.19 10.16 9.84 9.77 9.63 B9.5V 183 0
2 HD 37411 Or* 05 38 14.5072831944 -05 25 13.301118588 10.03 9.91 9.79 9.60 9.45 hA3VakA0mA0(eb)_lB 88 0
3 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1781 1
4 HD 109573 PM* 12 36 01.0317461592 -39 52 10.220465388   5.786 5.774 7.25 5.81 A0V 589 1
5 NAME HD 141569BC ** 15 49 57.34536 -03 55 10.9992         10.40 G0Ve 28 0
6 HD 141569 Y*O 15 49 57.7482550392 -03 55 16.341617064 7.22 7.20 7.12 7.00 7.04 A2VekB9mB9(_lB) 500 0

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2022.05.22-01:21:44

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