Table 1: The sample of HAEBEs used in this analysis, based on Thé et al. (1994) and Malfait et al. (1998). For each object, the available optical spectra are indicated. Furthermore, the SIMBAD values for right ascension (RA) and declination (Dec) are given, as well as the date, start time and integration time T of the observation.
Object Spectrum RA (2000) Dec (2000) Date Start T

$\rm h\hspace{0.3cm} m\hspace{0.3cm} s$ $^\circ$ $^\prime$ $^{\prime\prime}$ dd/mm/yy h m [m]

V376 Cas KPNO 00 11 26.1 +58 50 04 25/06/02 10:22 20

VX Cas KPNO 00 31 30.7 +61 58 51 24/06/02 10:06 25

AB Aur FEROS 04 55 45.8 +30 33 04 17/01/99 22:37 21

HD 31648 WHT 04 58 46.3 +29 50 37 24/12/96 00:00 20

HD 34282 ESO 3.6 m 05 16 00.5 -09 48 35 01/04/02 00:49 50

HD 34700 ESO 3.6 m 05 19 41.4 +05 38 43 01/04/02 00:05 40

HD 35929 CAT 05 27 42.8 -08 19 38 13/01/94 05:27 30

HD 36112 WHT 05 30 27.5 +25 19 57 24/12/96 02:18 25

HD 244604 WHT 05 31 57.3 +11 17 41 24/12/96 02:48 20

HD 245185 WHT 05 35 09.6 +10 01 52 24/12/96 03:42 12

V586 Ori CAT 05 36 59.3 -06 09 16 13/01/94 03:10 60

BF Ori CAT 05 37 13.3 -06 35 01 13/01/94 04:22 60

Z CMa ESO 3.6 m 07 03 43.2 -11 33 06 01/04/02 01:57 30

WHT 24/12/96 05:36 20

HD 95881 ESO 3.6 m 11 01 57.6 -71 30 48 01/04/02 23:46 17

HD 97048 ESO 3.6 m 11 08 03.3 -77 39 18 01/04/02 22:56 20

FEROS 28/01/99 04:28 55

HD 98922 CAT 11 22 31.7 -53 22 12 13/01/94 08:40 15

HD 100453 ESO 3.6 m 11 33 05.6 -54 19 29 01/04/02 01:44 10

FEROS 26/01/99 04:55 20

HD 100546 CAT 11 33 25.4 -70 11 41 13/01/94 07:55 10

ESO 3.6 m 01/04/02 02:32 10

ESO 3.6 m 31/03/02 23:27 10

FEROS 28/01/99 05:27 30

HD 101412 CAT 11 39 44.5 -60 10 28 13/01/94 09:06 20

HD 104237 ESO 3.6 m 12 00 05.1 -78 11 35 31/03/02 23:35 5

FEROS 27/01/99 03:38 20

HD 135344 ESO 3.6 m 15 15 48.4 -37 09 16 01/04/02 02:40 23

FEROS 27/01/99 04:02 45

HD 139614 ESO 3.6 m 15 40 46.4 -42 29 54 01/04/02 03:06 17

FEROS 27/01/99 04:49 30

HD 141569 ESO 3.6 m 15 49 57.8 -03 55 16 01/04/02 04:55 6

KPNO 23/06/02 03:57 10

HD 142666 ESO 3.6 m 15 56 40.0 -22 01 40 01/04/02 03:52 29

HD 142527 ESO 3.6 m 15 56 41.9 -42 19 23 01/04/02 03:30 20

HD 144432 ESO 3.6 m 16 06 58.0 -27 43 10 01/04/02 04:22 23

HR 5999 ESO 3.6 m 16 08 34.3 -39 06 18 01/04/02 04:46 6

HD 150193 ESO 3.6 m 16 40 17.9 -23 53 45 01/04/02 05:04 30

AK Sco ESO 3.6 m 16 54 44.9 -36 53 19 01/04/02 05:34 29

CD-42 $^\circ$ 11721 ESO 3.6 m 16 59 06.8 -42 42 08 01/04/02 06:05 60

HD 163296 ESO 3.6 m 17 56 21.3 -21 57 22 01/04/02 07:08 5

HD 169142 ESO 3.6 m 18 24 29.8 -29 46 49 01/04/02 07:15 17

MWC 297 ESO 3.6 m 18 27 39.6 -03 49 52 01/04/02 08:43 60

KPNO 25/06/02 05:40 20

VV Ser KPNO 18 28 49.0 +00 08 39 23/06/02 04:49 30

R CrA CAT 19 01 53.7 -36 57 08 19/08/94 12:43 45

T Cra ESO 3.6 m 19 01 58.8 -36 57 49 01/04/02 07:39 40

HD 179218 ESO 3.6 m 19 11 11.6 +15 47 16 01/04/02 09:47 8

KPNO 24/06/02 04:24 10

WW Vul KPNO 19 25 58.8 +21 12 31 23/06/02 06:31 30

HD 190073 KPNO 20 03 02.5 +05 44 17 24/06/02 05:01 10

BD+40 $^\circ$ 4124 KPNO 20 20 28.3 +41 21 52 23/06/02 08:11 20

LkH $\alpha$ 224 KPNO 20 20 29.3 +41 21 28 24/06/02 05:40 30

LkH $\alpha$ 225 KPNO 20 20 30.5 +41 21 27 23/06/02 09:21 30

PV Cep KPNO 20 45 54.3 +67 57 39 24/06/02 07:18 30

HD 200775 KPNO 21 01 36.9 +68 09 48 23/06/02 09:56 15

V645 Cyg KPNO 21 39 58.0 +50 14 24 25/06/02 07:12 30

BD+46 $^\circ$ 3471 KPNO 21 52 34.1 +47 13 45 25/06/02 08:52 20

SV Cep KPNO 22 21 33.3 +73 40 18 23/06/02 10:19 20

IL Cep KPNO 22 53 15.6 +62 08 45 25/06/02 09:58 20

MWC 1080 KPNO 23 17 25.6 +60 50 43 24/06/02 08:59 30

**Table 1:** The sample of HAEBEs used in this analysis, based on Thé et al. (1994) and Malfait et al. (1998). For each object, the available optical spectra are indicated. Furthermore, the SIMBAD values for right ascension (RA) and declination (Dec) are given, as well as the date, start time and integration time T of the observation.
Object	Spectrum	RA (2000)	Dec (2000)	Date	Start	T
		$\rm h\hspace{0.3cm} m\hspace{0.3cm} s$	$^\circ$ $^\prime$ $^{\prime\prime}$	dd/mm/yy	h m	[m]
V376 Cas	KPNO	00 11 26.1	+58 50 04	25/06/02	10:22	20
VX Cas	KPNO	00 31 30.7	+61 58 51	24/06/02	10:06	25
AB Aur	FEROS	04 55 45.8	+30 33 04	17/01/99	22:37	21
HD 31648	WHT	04 58 46.3	+29 50 37	24/12/96	00:00	20
HD 34282	ESO 3.6 m	05 16 00.5	-09 48 35	01/04/02	00:49	50
HD 34700	ESO 3.6 m	05 19 41.4	+05 38 43	01/04/02	00:05	40
HD 35929	CAT	05 27 42.8	-08 19 38	13/01/94	05:27	30
HD 36112	WHT	05 30 27.5	+25 19 57	24/12/96	02:18	25
HD 244604	WHT	05 31 57.3	+11 17 41	24/12/96	02:48	20
HD 245185	WHT	05 35 09.6	+10 01 52	24/12/96	03:42	12
V586 Ori	CAT	05 36 59.3	-06 09 16	13/01/94	03:10	60
BF Ori	CAT	05 37 13.3	-06 35 01	13/01/94	04:22	60
Z CMa	ESO 3.6 m	07 03 43.2	-11 33 06	01/04/02	01:57	30
	WHT			24/12/96	05:36	20
HD 95881	ESO 3.6 m	11 01 57.6	-71 30 48	01/04/02	23:46	17
HD 97048	ESO 3.6 m	11 08 03.3	-77 39 18	01/04/02	22:56	20
	FEROS			28/01/99	04:28	55
HD 98922	CAT	11 22 31.7	-53 22 12	13/01/94	08:40	15
HD 100453	ESO 3.6 m	11 33 05.6	-54 19 29	01/04/02	01:44	10
	FEROS			26/01/99	04:55	20
HD 100546	CAT	11 33 25.4	-70 11 41	13/01/94	07:55	10
	ESO 3.6 m			01/04/02	02:32	10
	ESO 3.6 m			31/03/02	23:27	10
	FEROS			28/01/99	05:27	30
HD 101412	CAT	11 39 44.5	-60 10 28	13/01/94	09:06	20
HD 104237	ESO 3.6 m	12 00 05.1	-78 11 35	31/03/02	23:35	5
	FEROS			27/01/99	03:38	20
HD 135344	ESO 3.6 m	15 15 48.4	-37 09 16	01/04/02	02:40	23
	FEROS			27/01/99	04:02	45
HD 139614	ESO 3.6 m	15 40 46.4	-42 29 54	01/04/02	03:06	17
	FEROS			27/01/99	04:49	30
HD 141569	ESO 3.6 m	15 49 57.8	-03 55 16	01/04/02	04:55	6
	KPNO			23/06/02	03:57	10
HD 142666	ESO 3.6 m	15 56 40.0	-22 01 40	01/04/02	03:52	29
HD 142527	ESO 3.6 m	15 56 41.9	-42 19 23	01/04/02	03:30	20
HD 144432	ESO 3.6 m	16 06 58.0	-27 43 10	01/04/02	04:22	23
HR 5999	ESO 3.6 m	16 08 34.3	-39 06 18	01/04/02	04:46	6
HD 150193	ESO 3.6 m	16 40 17.9	-23 53 45	01/04/02	05:04	30
AK Sco	ESO 3.6 m	16 54 44.9	-36 53 19	01/04/02	05:34	29
CD-42 $^\circ$ 11721	ESO 3.6 m	16 59 06.8	-42 42 08	01/04/02	06:05	60
HD 163296	ESO 3.6 m	17 56 21.3	-21 57 22	01/04/02	07:08	5
HD 169142	ESO 3.6 m	18 24 29.8	-29 46 49	01/04/02	07:15	17
MWC 297	ESO 3.6 m	18 27 39.6	-03 49 52	01/04/02	08:43	60
	KPNO			25/06/02	05:40	20
VV Ser	KPNO	18 28 49.0	+00 08 39	23/06/02	04:49	30
R CrA	CAT	19 01 53.7	-36 57 08	19/08/94	12:43	45
T Cra	ESO 3.6 m	19 01 58.8	-36 57 49	01/04/02	07:39	40
HD 179218	ESO 3.6 m	19 11 11.6	+15 47 16	01/04/02	09:47	8
	KPNO			24/06/02	04:24	10
WW Vul	KPNO	19 25 58.8	+21 12 31	23/06/02	06:31	30
HD 190073	KPNO	20 03 02.5	+05 44 17	24/06/02	05:01	10
BD+40 $^\circ$ 4124	KPNO	20 20 28.3	+41 21 52	23/06/02	08:11	20
LkH $\alpha$ 224	KPNO	20 20 29.3	+41 21 28	24/06/02	05:40	30
LkH $\alpha$ 225	KPNO	20 20 30.5	+41 21 27	23/06/02	09:21	30
PV Cep	KPNO	20 45 54.3	+67 57 39	24/06/02	07:18	30
HD 200775	KPNO	21 01 36.9	+68 09 48	23/06/02	09:56	15
V645 Cyg	KPNO	21 39 58.0	+50 14 24	25/06/02	07:12	30
BD+46 $^\circ$ 3471	KPNO	21 52 34.1	+47 13 45	25/06/02	08:52	20
SV Cep	KPNO	22 21 33.3	+73 40 18	23/06/02	10:19	20
IL Cep	KPNO	22 53 15.6	+62 08 45	25/06/02	09:58	20
MWC 1080	KPNO	23 17 25.6	+60 50 43	24/06/02	08:59	30

Source LaTeX | All tables | In the text

	1 Introduction
	2 The data set
	3 Analysis of the emission lines
	4 Interpretation
	5 Modeling the [O I] emission region
	6 Comparison with the observations
	7 Conclusions and discussion
	Appendix
	References