2013A&A...551A..21K


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.24CET01:57:28

2013A&A...551A..21K - Astronomy and Astrophysics, volume 551A, 21-21 (2013/3-1)

Revealing the inclined circumstellar disk in the UX Orionis system KK Ophiuchi.

KREPLIN A., WEIGELT G., KRAUS S., GRININ V., HOFMANN K.-H., KISHIMOTO M., SCHERTL D., TAMBOVTSEVA L., CLAUSSE J.-M., MASSI F., PERRAUT K. and STEE P.

Abstract (from CDS):

We study the inner sub-AU region of the circumstellar environment of the UX Ori-type star KK Oph with near-infrared VLTI/AMBER interferometry. We are particularly interested in the inclination of the star-disk system, and we use this information to test the current standard picture for UX Ori stars. We recorded spectrally dispersed (R∼35) interferograms in the near-infrared H and K bands with the VLTI/AMBER instrument. The derived visibilities, closure phases, and the spectral energy distribution of KK Oph were compared with two-dimensional geometric and radiative transfer models (RADMC). We obtained visibilities at four different position angles. Using two-dimensional geometric models, we derive an axis ratio ∼3.0 corresponding to an inclination of ∼70°. A fitted inclined ring model leads to a ring radius of 2.8±0.2mas, corresponding to 0.44±0.03AU at a distance of 160pc, which is larger than the dust sublimation radius of ∼0.1AU predicted for a dust sublimation temperature of 1500 K. Our derived two-dimensional RADMC model consists of a circumstellar disk with an inclination angle of ∼70° and an additional dust envelope.The finding of an ∼70° inclined disk around KK Oph is consistent with the prediction that UX Ori objects are seen under large inclination angles, and orbiting clouds in the line of sight cause the observed variability. Furthermore, our results suggest that the orbit of the companion KK Oph B and the disk plane are coplanar.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - stars: pre-main sequence - stars: individual: KK Ophiuchi - circumstellar matter

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* UX Ori Ae* 05 04 29.9881676817 -03 47 14.288047238 10.25 10.93 8.70 9.62 9.43 A4IVe 337 1
2 HD 36112 Ae* 05 30 27.5286772598 +25 19 57.082162439   8.57 8.27     A8Ve 376 0
3 V* Z CMa Ae* 07 03 43.1588002461 -11 33 06.230351311 10.51 9.99 8.80     B5/8eq+F5/7 537 3
4 HD 58647 Em* 07 25 56.0988044433 -14 10 43.548997982 6.81 6.92 6.85 6.73 6.73 B9IV 75 0
5 HD 142666 TT* 15 56 40.0222941557 -22 01 40.004849949 9.41 9.37 8.82 8.31 8.01 F0V_sh 223 0
6 HD 143006 Or* 15 58 36.9127773802 -22 57 15.221492622   10.92 10.14   8.70 G5IVe 174 0
7 HD 144482 * 16 11 18.2084461819 -69 16 59.774364684   10.26 10.04     A2 3 0
8 HD 150193 Be* 16 40 17.9242900066 -23 53 45.192676418 9.69 9.32 8.79 8.41   B9.5Ve 296 0
9 LDN 1685 MoC 17 08 46 -32 06.8           ~ 11 0
10 EM* AS 220 Ae* 17 10 08.1238 -27 15 18.801 12.86 12.79 12.22 12.03 10.82 A6Ve+G5Ve 131 0
11 HD 155650 * 17 14 02.0199673584 -27 47 47.665889907   7.26 6.70     F2III 13 0
12 HD 163296 Ae* 17 56 21.2882188601 -21 57 21.872343282 7.00 6.93 6.85 6.86 6.67 A1Vep 834 0
13 V* WW Vul Ae* 19 25 58.7494596284 +21 12 31.333220807 11.46 10.99 10.25 10.38 10.12 A2IVe 215 0
14 BD+40 4124 Ae* 20 20 28.2415737117 +41 21 51.527810947 11.11 11.36 10.62 10.510   B2Ve 277 1
15 EM* AS 442 Ae* 20 47 37.4658048789 +43 47 24.973275249 11.90 11.56 10.90 10.18 9.95 B8Ve 83 0
16 BD+46 3471 Ae* 21 52 34.0992388111 +47 13 43.600551484 10.72 10.56 10.15     A0.5IIIer 198 1

    Equat.    Gal    SGal    Ecl

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2021.01.24-01:57:28

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