Mapping the Milky Way with Gaia Bp/Rp spectra - II. The inner stellar halo traced by a large sample of blue horizontal branch stars

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Volume 700 (August 2025)

A&A, 700 (2025) A244

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Table 1

Best estimated parameters of the stellar halo shape derived from the BHB catalog.

log₁₀(ν)	N^a	r^a	q^a	N^b	r^b	q^b
−1.25	1701	8.22	0.35	1220	7.17	0.40
−1.35	2023	8.35	0.38	1527	7.43	0.42
−1.45	2561	8.64	0.40	2078	7.69	0.45
−1.55	2500	8.98	0.42	2217	8.14	0.46
−1.65	2469	9.46	0.44	2189	8.51	0.48
−1.75	2350	9.59	0.47	2224	9.01	0.49
−1.85	2384	10.42	0.46	2257	9.76	0.49
−1.95	2212	10.95	0.47	2097	10.15	0.51
−2.05	2177	11.38	0.50	2070	10.70	0.53
−2.15	2046	11.86	0.52	1919	11.26	0.55
−2.25	1987	12.32	0.55	1881	11.76	0.57
−2.35	2028	12.95	0.57	1887	12.36	0.59
−2.45	1853	13.39	0.62	1707	13.05	0.61
−2.55	1808	14.34	0.64	1593	13.72	0.63
−2.65	1818	15.23	0.65	1608	14.27	0.67
−2.75	1727	15.36	0.73	1453	14.80	0.71
−2.85	1477	16.12	0.76	1249	15.65	0.73
−2.95	1356	16.89	0.81	1091	16.25	0.76
−3.05	1194	18.04	0.81	937	16.97	0.78
−3.15	1018	19.29	0.80	789	17.83	0.79
−3.25	832	20.73	0.78	650	18.82	0.79
−3.35	654	21.35	0.80	549	19.62	0.81
−3.45	496	22.16	0.82	439	20.88	0.79
−3.54	387	23.31	0.83	328	21.95	0.80
−3.65	263	25.61	0.78	224	23.61	0.80
−3.75	182	26.42	0.83	147	24.88	0.81

Notes. N is the number of stars in the bin, ^a indicates the BHB sample, and ^b indicates the BHB subsample of the smooth stellar halo.

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