N2H+ depletion in the massive protostellar cluster AFGL 5142

Free Access

Table 1

Parameters of the hyperfine fits to the N₂H⁺ (1–0) line for the central position of each core.

	Position^a		A τ _m^b	v _LSR^c	Δv		T _ex	N(N₂H⁺)

Core	α(J2000)	δ(J2000)	(K km s^-1)	(km s^-1)	(km s^-1)	τ _m^d	(K)	(× 10¹² cm^-2)

central^e	05:30:48.02	33:47:53.4	0.51 ± 0.04	–0.97 ± 0.06	1.11 ± 0.10	0.10 ± 0.03	8.2 ± 1.6	2.8 ± 0.9
eastern	05:30:48.73	33:47:52.9	1.35 ± 0.02	–2.92 ± 0.01	1.60 ± 0.02	0.10 ± 0.02	16.7 ± 1.1	18.5 ± 1.2
western	05:30:47.47	33:47:51.7	2.45 ± 0.01	–3.57 ± 0.01	1.31 ± 0.03	0.27 ± 0.02	12.4 ± 0.8	14.4 ± 1.2

Notes.

^(a)

Positions, given in (h m s) and (° ′′′);

^(b)

A = f(J_ν(T_ex) − J_ν(T_bg)), where f is the filling factor (assumed to be 1), T_ex is the excitation temperature of the transition, T_bg is the background radiation temperature, and J_ν(T) is the intensity in units of temperature, J_ν(T) = (hν/k)/(exp(hν/kT) − 1);

^(c)

v_LSR corresponding to the F₁F = 01 → 12 hyperfine component;

^(d)

optical depth of the main line, F₁F = 23 → 12, obtained from the fit;

^(e)

position of the central core taken from the NH₃ emission peak.

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.