2000A&A...361L..29S


Query : 2000A&A...361L..29S

2000A&A...361L..29S - Astronomy and Astrophysics, volume 361, L29-32 (2000/9-2)

Diffraction-limited bispectrum speckle interferometry and speckle polarimetry of the young bipolar outflow source S140 IRS1.

SCHERTL D., BALEGA Y., HANNEMANN T., HOFMANN K.-H., PREIBISCH T. and WEIGELT G.

Abstract (from CDS):

We present bispectrum speckle interferometry and speckle polarimetry of the deeply embedded infrared bipolar outflow source S140 IRS1, a massive protostellar object in the L1204 molecular cloud. Using the SAO 6 m telescope, we obtained 280 mas resolution polarization maps of S140 IRS1 as well as a K-band image with diffraction-limited resolution λ/D of 76 mas, which is the highest angular resolution image of a young outflow source ever obtained in the infrared. Our data suggest that the central source is marginally resolved with a FWHM diameter of approximately 20 mas (∼20 AU). The most remarkable feature in our image is a bright extended and very clumpy structure pointing away from the central source in exactly the same direction as the blue-shifted CO outflow lobe. A centro-symmetric pattern of high polarization in this feature suggests that we see scattered light from the central source. We interprete this feature as the clumpy inner surface of a partially evacuated cavity in the circumstellar envelope around IRS1, which has been excavated by the strong outflow from IRS1.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - stars: individual: S140 IRS1 - stars: formation - stars: winds, outflows

Nomenclature: Fig.1: [SBH2000] A (Nos A-G).

Simbad objects: 17

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Number of rows : 17
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 NGC 7160 OpC 21 53 48 +62 35.3   6.34 6.1     ~ 218 0
2 HD 211642 * 22 16 32.3073380736 +63 42 44.745576624   8.33 7.24     G5 11 0
3 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 645 2
4 IRAS 22176+6303 Y*O 22 19 17.978 +63 18 52.92           ~ 590 0
5 NAME SH 2-140 IRS 1 Y*O 22 19 18.277 +63 18 45.82           ~ 194 0
6 NAME SH 2-140 IRS 2 NIR 22 19 18.514 +63 18 55.16           ~ 35 0
7 NAME SH 2-140 IRS 3 NIR 22 19 19.853 +63 18 48.07           ~ 47 0
8 HD 212365 * 22 21 51.7857367560 +63 08 23.943805584   7.02 6.95     A0 10 0
9 HD 212495 * 22 23 00.5205582432 +62 25 09.691259124   6.055 6.032     A1V 30 0
10 LDN 1204 DNe 22 26.7 +63 15           ~ 87 1
11 [SBH2000] A PoC ~ ~           ~ 2 0
12 [SBH2000] E PoC ~ ~           ~ 2 0
13 [SBH2000] G PoC ~ ~           ~ 2 0
14 [SBH2000] F PoC ~ ~           ~ 2 0
15 [SBH2000] D PoC ~ ~           ~ 2 0
16 [SBH2000] C PoC ~ ~           ~ 2 0
17 [SBH2000] B PoC ~ ~           ~ 2 0

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2022.05.19-20:29:46

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