1998A&A...332.1055A


Query : 1998A&A...332.1055A

1998A&A...332.1055A - Astronomy and Astrophysics, volume 332, 1055-1063 (1998/4-3)

Near infrared imaging and spectroscopy of the IRAS 20126+4104 region.

AYALA S., CURIEL S., RAGA A.C., NORIEGA-CRESPO A. and SALAS L.

Abstract (from CDS):

In this paper we present near-infrared images and K'-band spectra (1.95-2.30µm) of the nebulae located in the IRAS 20126+4104 region. We find bright cometary shaped objects to the Northwest of the IRAS position and other emission line objects to the Southeast. We have detected 6 low excitation emission lines of molecular hydrogen, and present spatially resolved excitation temperatures, 1-0 S(1)/2-1 S(1) line ratios and ortho-para ratios for the brighter emission line objects near the IRAS source. The integrated flux in the H2 1-0 S(1) line of the brighter object located to the Northwest of the IRAS position is 6.85x10–13erg/cm2/s, integrated within an aperture of 10.2arcsec2. From a spectrophotometric analysis, we conclude that the H2 emission observed in this nebula is mainly produced by collisional excitation combined with fluorescent H2 emission. However, it is unclear from our observations whether the UV radiation field that would be responsible for the fluorescent component is produced by the IRAS source itself, or by the stars embedded at the Eastern edges of two of the observed condensations.

Abstract Copyright:

Journal keyword(s): ISM: jets and outflows - infrared: ISM: lines and bands - ISM: individual objects: IRAS 20126+4104

Nomenclature: Figs 1 and 2: [ACR98] Jet, [ACR98] A (Nos A-D).

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 - 2022
#notes
1 GSC 00048-01015 * 02 57 21.2094908544 +00 18 38.657183652 12.136 12.028 11.725 11.549 11.363 A2 32 0
2 HH 43 HH 05 38 10.4 -07 09 25           ~ 100 0
3 NGC 2023 RNe 05 41 37.9 -02 15 52           ~ 597 1
4 HH 120 HH 08 09 32.6 -36 04 55           ~ 59 0
5 HH 99A HH 19 02 05.41 -36 54 39.6           ~ 19 0
6 HD 189178 SB* 19 57 13.8676056936 +40 22 04.173175488   5.352 5.455     B5V 69 0
7 [ACR98] D PoC 20 14 24.8 +41 13 53           ~ 2 0
8 IRAS 20126+4104 Y*O 20 14 25.8816769656 +41 13 36.879427236           B2.5-B0.5 415 0
9 [ACR98] Jet PoC 20 14 27.9 +41 12 55           ~ 1 0
10 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 426 2
11 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 1001 0
12 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2400 1
13 HD 201941 * 21 12 45.3247566600 +02 38 33.849505896   7.14 6.99     A2/3V 46 0
14 [ACR98] A PoC ~ ~           ~ 2 0
15 [ACR98] C PoC ~ ~           ~ 2 0
16 [ACR98] B PoC ~ ~           ~ 2 0

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2022.05.22-22:46:46

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