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Home All issues Volume 537 (January 2012) A&A, 537 (2012) A98 Full HTML
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Table 1

List of molecular species and transitions observed with HIFI in L1157 B2 and R.

Transition ν0a Euab HPBW Tpeak rmsc Vpeak Vmax Vmin FWHM Fint
(MHz) (K) (″) (mK) (mK) (km s-1) (km s-1) (km s-1) (km s-1) (mK km s-1)
B2 (αJ2000 = 20h39m1250, δJ2000 = +68° 00′ 410)
o–HO (110–101) 547 676.44 27 38 10.3(2)d 3 +1.8(0.3)d +7 –4 5.4(0.6)d 59(7)d
o–H2O (110–101) 556 936.01 27 38 200(13)e 13 +2.7(1)e +12 –9 – 8360(40)
p–H2O (211–202) 752 033.23 137 28 270(14)d 16 +2.4(0.2)d +7 –7 4.8(0.2)d 1368(55)d
o–H2O (312–303) 1 097 364.79 215 19 125(17)d 19 +1.6(0.2)d +13 –3 4.4(0.4)d 583(61)d
p–H2O (111–000) 1 113 342.96 53 19 75(20)e 20 +2.6(1.0)e +12 –9 – 4510(33)
o–H2O (212–101) 1 669 904.77 80 13 47(60)e 60 +2.6(1.0)e +11 –11 – 4221(120)
R(αJ2000 = 20h39m0100, δJ2000 = +68°04′310)
o–H2O (110–101) 556 936.01 27 38 256(5) 5 +19.6(1.0) +35 –3 – 5027(31)
p–H2O (211–202) 7 52 033.23 137 28 176(13) 13 +7.7(1.0) +30 +7 – 2103(60)
o–H2O (312–303) 1 097 364.79 215 19 154(22)e 22 +6.4(1.0)e +21 –2 – 1633(99)
p–H2O (111–000) 1 113 342.96 53 19 228(15) 15 +19.6(1.0) +27 –5 – 2555(74)
o–H2O (212–101) 1 669 904.77 80 13 –  <222 – – – – –

Notes. Peak velocity, intensity (in TA scale), integrated intensity (not corrected for beam efficiency, Fint), minimum and maximum velocities (Vmin, Vmax), and linewidth (FWHM) are reported. .

(a)

Frequencies and spectroscopic parameters have been extracted from the Jet Propulsion Laboratory molecular database (Pickett et al. 1998).

(b)

With respect to the ground H2O level 101 for the ortho-H2O level and 000 for the para-H2O level, respectively.

(c)

At a spectral resolution of 1 km s-1

(d)

Gaussian fit when the observed profile is Gaussian-like.

(e)

Measurements taken at the dip of the emission line.

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