Exploring organic chemistry in planet-forming zones

Free Access

Table 1

Basic molecular data.

Molecule	Formula	Band	^a	S _lit^a		Source^c
			[cm^-1]	[atm^-1 cm^-2]	[atm^-1 cm^-2]

Acetylene	C₂H₂	ν₅ CH bending	729.1	630	816	H08
Carbon dioxide	CO₂	ν₂ bending	667.4	200	249	H08
Hydrogen cyanide	HCN	ν₂ bending	713.5	257	286	H08
Hydrogen isocyanide	HNC	ν₂ bending	464.2	1570	798	G09
Methyl radical	CH₃	ν₂ out-of-plane bending	606.5	611	616	FPH
Ethylene	C₂H₄	ν₇ CH2 waggling	949.2	324	320	G09
Ammonia	NH₃	ν₂ symmetric bendng	950.0	568	614	H08
Sulphur dioxide	SO₂	ν₂ bending	517.6	113	97	G09
Ethane	C₂H₆	ν₉ CH3 rocking	822.0	36	29	H08
Diacetylene/butadiyne	C₄H₂	ν₈ CH bending	627.9	437	229	G09
Benzene	C₆H₆	ν₄ CH bending	673.5	250	212	G09
Propyne/methyl acetylene	C₃H₄	ν₉ CH bending	638.6	360	201	G09
Cyanoacetylene/propynenitrile	HC₃N	ν ₅	663.4	278	94	G09
Methyl cyanide/acetonitrile	CH₃CN	ν₄ CC stretch	920.3	6	3	G09

Notes.

^(a)

Central wavenumber of band and band strengths from Constants for molecules of astrophysical interest in the gas phase by J. Crovisier http://wwwusr.obspm.fr/~crovisie/basemole/.

^(b)

Band strength of the simulated spectra. S = N_L × ^∫τ(ν)δν / n (see Appendix A.1 Helmich 1996). Calculations were performed for T = 298 K, b = 20 km s^-1 and n = 1 × 10¹⁵ cm^-2 at a resolution of 3000 to keep all bands far from saturation.

^(c)

H08: HITRAN 2008 (Rothman et al. 2009), G09: GEISA 2009 (Jacquinet-Husson et al. 2011) and FPH: Helmich (1996).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.