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Table 5

Sources in which HOOH has been searched for.

Source HOOH HOOH Ref.
rms Tmbdv
(mK) (mK km s−1)
ρ Oph-A 167 (a) [1]
Orion “H2-Peak 1” 26.1 (b) 172 (b) [2]

r Oph-B2-MM8 22.9 [3]
G15.01-0.67 19.2 [3]
G018.82-00.28MM1 21.1 [3]
G018.82-00.28MM4 21.0 [3]
G028.53-00.25MM1 17.7 [3]
NGC 6334I(N) 18.6 [3]
G1.6-0.025 16.1 [3]
NGC 1333-IRAS 4A 24.6 [3]
L1527 18.4 [3]
R CrA-IRS 7B 23.1 [3]

IRAS 16293-2422 <67 [4]

R CrA-IRS 5A 9.7(a) ≤10.2(a) [5]
NGC 1333-IRAS 2A 8.0(a) ≤13.5(a) [5]
L1551-IRS 5 2.1(c) ≤4.3(c) [5]
L1544 5.0(c) ≤4.5(c),(d) [5]

Notes. (a) Transition 30,3 − 21,1 at 219.167 GHz; (b)value from transition 30,3−21,1 at 219.167 GHz, which is one of five observed HOOH transitions, with the best S/N. Here the integrated area is given in ∫ TAdv and not in ∫ Tmbdv; (c) value from transition 41,3 − 30,3 at 143.712 GHz; (d)instead of using the mean FWHM value in Table 3, we assumed the higher FWHM value to estimate the upper limit.

References. [1] Bergman et al. (2011a), [2] Liseau & Larsson (2015), [3] Parise et al. (2014), [4] TIMASS survey Caux et al. (2011), and [5] this work.

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