Water vapour masers in long-period variable stars - IV. Mira variables RCas, o Cet and R Leo

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Table 2

H₂O-maser luminosities, stellar luminosities, and mass-loss rates of the stars we studied so far.

Star	Type	D (pc)	log $L_{H_{2} O}^{u p}$ $L_{\rm H_2O}^{\rm up}$ (L_⊙)	log S_tot, log L_p (Jy km s⁻¹), (s⁻¹)						log L_bol (L_⊙)	log Ṁ (M_⊙ yr⁻¹)
Star	Type	D (pc)	log $L_{H_{2} O}^{u p}$ $L_{\rm H_2O}^{\rm up}$ (L_⊙)	High		Mean		Low		log L_bol (L_⊙)	log Ṁ (M_⊙ yr⁻¹)
R Crt	SRV	236	−4.88	3.5	44.0	2.9	43.4	2.3	42.8	4.03 ± 0.10	−5.46
RT Vir	SRV	226	−5.16	3.3	43.8	2.8	43.3	2.3	42.8	3.70 ± 0.09	−6.05
RX Boo	SRV	136	−6.23	2.6	42.7	1.9	41.9	1.5	41.5	3.58 ± 0.11	−6.12
SV Peg	SRV	333	−6.42	1.6	42.4	0.9	41.7	<0.8	<41.6	3.93 ± 0.20	−6.04
o Cet	Mira	92	−8.16	1.2	40.9	0.5	40.2	<0.08	<39.8	3.54 ± 0.16	−6.73
R Leo	Mira	71	−7.83^f	1.7	41.1	<0.7	<40.2	−	−	3.23 ± 0.15	−7.16
U Her	Mira	266	−5.77	2.6	43.3	2.0	42.6	1.5	42.1	3.71 ± 0.17	−6.25
χ Cyg	Mira	160	−	<0.7	<40.9	−	−	−	−	3.79 ± 0.10	−6.56
RR Aql	Mira	410	−5.37	2.7	43.9	2.1	43.3	1.4	42.6	3.75 ± 0.15	−5.84
R Cas	Mira	174	−6.14^†	2.3	42.6	1.0	41.2	<0.7	<41.0	3.75 ± 0.15	−5.97

Notes. The stellar type is semi-regular variable (SRV) or Mira. We list distances D with their references as noted below. Characteristic levels of H₂O-maser brightness (S_tot = integrated flux densities) and maser luminosities ( $L_{H_{2} O}^{u p}$ $L_{\rm H_2O}^{\rm up}$ (L_⊙); L_p(photons s⁻¹)) are listed for the objects from Paper I in 1987-2005, from Papers II and III in 1987-2015, and from this paper in 1988-2015 or 1987/1990-2023. The definition of the levels (high, mean, and low) is described in the main text. Columns log L_bol and log M list stellar luminosities and mass-loss rates, respectively. Reference for distances: see Table 1; Papers I, II and III.^†: The H₂O-maser luminosity derived from the upper-envelope spectrum $L_{H_{2} O}^{u p}$ $L_{\rm H_2O}^{\rm up}$ excluding the burst periods are log $L_{H_{2} O}^{u p} = - 8.69$ $L_{\rm H_2O}^{\rm up} = -8.69$ L_⊙ for R Leo (6 observations ignored) and log $L_{H_{2} O}^{u p} = - 6.90$ $L_{\rm H_2O}^{\rm up} = -6.90$ L_⊙ for R Cas (7 observations ignored).

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