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Table 3

Summary of the initial values.

Parameter C/2001 Q4 C/2002 T7 9P/Tempel 1

Q(H2O) 2.6 × 1029 s-1 [1] 6.9 × 1028 s-1 [7] 3.4 × 1027(1.21 × 1028)s-1 [9] ([11])
M(CO) 0.042 [2] 0.04 0.147 (0.041) [10]
M(CO2) 0.04 0.04 0.04
M(CH4) 0.006* [3] 0.006* [3] 0.006* [3]
M(H2CO) 0.011* [3] 0.016 [13] 0.011* [3]
M(CH3OH) 0.015 [4] 0.038 [4] 0.048 (0.014) [11]
M(NH3) 0.007* [3] 0.007* [3] 0.007* [3]
M(HCN) 0.00047 [5] 0.0033 [5] 0.006 (0.0017) [11]
M(HNCO) 0.001* [3] 0.001* [3] 0.001* [3]
M(CH3CN) 0.0002* [3] 0.0002* [3] 0.0002* [3]
R N 3.75 km [6] 52.0 km [8] 3.0 km [12]
T(r = RN) 171.6 K 169.3 K 166.2 K
v(r = RN) 325.1 ms-1 322.9 ms-1 319.9 ms-1

Notes. Q represents the production rates in absolute units, M production rates relative to the production rate of water. RN, T, and v are the nuclear radius, and the temperature and velocity of the neutral fluid, respectively. For comet 9P/Tempel 1, two values of the water production from different publications were used.

References. [1] – Biver et al. (2009), average of all data from the time 29/30 Apr. 2004; [2] – Feldman et al. (2004); [3] – Bockelee-Morvan & Crovisier (2003); [4] – Remijan et al. (2006); [5] – Friedel et al. (2005); [6] – Tozzi et al. (2003) (estimated value); [7] – Howell et al. (2004); [8] – Weiler et al. (2011) (upper limit); [9] – Küppers et al. (2005); [10] – Feldman et al. (2006); [11] – Mumma et al. (2005); [12] – A’Hearn et al. (2005); [13] – Milam et al. (2006), H2CO from parent species.

*

Value derived for comet Hale-Bopp at rh ≈ 1 AU.

Estimate, based on Despois et al. (2005).

This work.

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