2025A&A...699A.345Z

Query : 2025A&A...699A.345Z

2025A&A...699A.345Z - Astronomy and Astrophysics, volume 699A345 (2025/7-1)

Validating the bright Gaia celestial reference frame with new VLBI astrometry of radio stars.

ZHANG J., ZHANG B., XU S. and MAI X.

Abstract (from CDS):

Aims. There exist inconsistencies between the bright and faint Gaia Celestial Reference Frame 3 (Gaia-CRF3), which manifests as a systematic rotation and needs to be independently estimated then corrected in future data releases.
Methods. We collected 64 radio stars with very long baseline interferometry (VLBI) astrometry, of which 16 have new VLBI observations with reference epochs close to Gaia. We estimated the orientation and spin biases of the bright Gaia-CRF3 by comparing VLBI radio star astrometry with their Gaia DR3 counterparts. We also attempted to estimate orientation by utilizing the a priori magnitude-dependent spin parameters derived from Gaia's internal estimations.
Results. Our independent estimation of the orientation at G < 10.5 is [-15 ± 119, +330 ± 139, +218 ± 109] μas (J2016.0), and the spin ([+21 ± 18, +52 ± 20, -7 ± 20] μ μas yr–1) agrees with Gaia's internal estimation within a 1σ range. The orientation-only estimation suggests that the orientation bias of the bright Gaia-CRF3 may also be magnitude-dependent.

Abstract Copyright: © The Authors 2025

Journal keyword(s): astrometry - reference systems - stars: kinematics and dynamics

Simbad objects: 64

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Number of rows : 64
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* SY Scl OH* 00 07 36.2434386312 -25 29 39.966460440       13.417 8.578 M6e 74 0
2 V* UV Psc EB* 01 16 55.1191752816 +06 48 42.131407176   9.73 9.01   8.223 G5(N) 267 0
3 HD 8357 XB* 01 22 56.7568636416 +07 25 09.332224320 8.530 8.160   6.8   G5 181 0
4 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 388 0
5 LS I +61 303 HXB 02 40 31.6644419688 +61 13 45.593918580 11.27 11.61 10.75 10.19 9.55 B0Ve 903 2
6 V* RZ Cas SB* 02 48 55.5102370536 +69 38 03.441502644   6.40 6.26     A3V 471 0
7 V* UX Ari RS* 03 26 35.3756804760 +28 42 54.226408428 7.76 7.28 6.37     K0IV 726 0
8 HD 22468 RS* 03 36 47.2904292073 +00 35 15.943692002 7.09 6.79 5.90     K2:Vnk 1206 0
9 V* V1271 Tau RS* 03 43 48.3323982308 +25 00 15.795725924   12.47 11.62 11.69   ~ 92 0
10 V* V811 Tau BY* 03 45 21.1862906887 +23 43 38.888404751 14.771 13.67 12.57   11.24 G5 102 0
11 V* EI Eri RS* 04 09 40.8923562192 -07 53 34.175993568   7.71 7.04     G3V 298 0
12 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 445 0
13 * b Per SB* 04 18 14.6214589094 +50 17 43.775037161   4.639 4.594   4.44 A1III 165 0
14 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 483 0
15 V* V1023 Tau Or* 04 18 47.0291197872 +28 20 07.493080560   14.31 12.00 11.21   K7 178 0
16 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 308 0
17 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
18 HD 283641 TT* 04 24 49.0452856368 +26 43 10.395844176   12.41 11.42     K0 45 0
19 V* V1110 Tau RS* 04 34 39.2797655376 +25 01 01.016239440   11.14 10.308   9.141 G0 65 0
20 CoKu HP Tau G2 Or* 04 35 54.1535049648 +22 54 13.426506072 13.63 12.31 11.158 10.14 9.172 G2e 138 0
21 HD 282630 Or* 04 55 36.9695564640 +30 17 55.101300900   12.17 11.12 10.55   K0Ve 185 0
22 V* T Lep Mi* 05 04 50.8451254800 -21 54 16.520551560   11.60 10.59     M6.5e 158 0
23 RX J0522.9+0857 TT* 05 22 54.7927274928 +08 58 04.679488200   11.28 10.33 9.75 9.080 K1 18 1
24 V* V1961 Ori Or* 05 34 27.3459769056 -05 24 22.285932228 14.707 13.367 12.440   10.616 G9IV-V 52 0
25 Brun 334 Or* 05 34 39.7638260448 -05 24 25.590693312 14.065 12.535 11.606   9.794 K3V+K5V 92 0
26 V* V1321 Ori Or* 05 35 04.3009445808 -05 08 12.737523192   11.94 10.538   9.117 K0III 103 0
27 V* MT Ori Or* 05 35 17.9482748184 -05 22 45.477710148 14.524 13.208 12.229   10.063 K2 110 0
28 HD 37017 SB* 05 35 21.8667428568 -04 29 39.024375324 5.66 6.43 6.56 6.61 6.74 B2/3V 318 0
29 HD 37150 * 05 36 15.0278258688 -05 38 52.514534220 5.52 6.34 6.51     B3III/IV 127 0
30 TYC 5346-538-1 * 05 42 33.6762430368 -08 07 15.179636748   11.70 11.09 10.41   B8.1 15 0
31 HD 290862 Y*O 05 46 43.3856873232 +00 04 36.042148164 10.93 11.04 10.41 10.24   B3/5 71 1
32 [SSC75] M 78 11 V* 05 46 45.3377559024 +00 02 40.308293832 14.08 14.05 13.09     A0II 36 1
33 V* V1355 Ori RS* 06 02 40.3603759560 -00 51 37.225252080   10.05 9.194   8.080 K0-2IV 54 0
34 V* SV Cam SB* 06 41 19.0827100176 +82 16 02.435351448       9.0   G2IV-V 367 0
35 V* AR Mon RS* 07 20 48.4542865200 -05 15 35.796949272   9.84 8.79   7.608 G6IV 176 0
36 V* VY CMa s*r 07 22 58.3261352189 -25 46 03.194390594 12.01 10.068 8.691 7.938   M5Iae 1169 0
37 * 54 Cam RS* 08 02 35.7833395368 +57 16 25.055079888   7.11 6.49     F9IV+G5IV 182 0
38 V* XY UMa RS* 09 09 55.9354759992 +54 29 17.724193872       9.620   G5 262 0
39 V* IL Hya RS* 09 24 49.0136973144 -23 49 34.714396272   8.38 7.37     K2IV/Vp 176 0
40 V* FF UMa RS* 09 33 46.5475525248 +62 49 40.253535552   8.87 7.88 11.8 6.91 G5 52 0
41 V* DM UMa RS* 10 55 43.5438405648 +60 28 09.721480656   10.31 9.29     K0III-IV 176 0
42 V* S Crt AB* 11 52 45.0981904920 -07 35 48.077650032   10.21 9.14     M6III 94 0
43 V* HU Vir RS* 12 13 20.6914862928 -09 04 46.880926320   9.69 8.71   7.639 K1V 154 0
44 V* DK Dra RS* 12 15 41.4909161616 +72 33 04.308176484   7.43 6.29     K0+IIICH-1 180 0
45 V* RS CVn RS* 13 10 36.9077924448 +35 56 05.584994412 8.57 8.51 7.93 7.7   F6IV+G8IV 753 0
46 V* BH CVn RS* 13 34 47.8087660104 +37 10 56.691826860 5.43 5.38 4.98 4.57 4.27 A6m 350 0
47 * del Lib SB* 15 00 58.3483018872 -08 31 08.210408772 4.82 4.93 4.93 4.85 4.84 A0V 305 0
48 V* S CrB Mi* 15 21 23.9553294936 +31 22 02.584877304 7.51 7.15 5.80 8.12   M6.5-8e 364 0
49 V* RS UMi RS* 15 50 49.4328812688 +72 12 40.628003544   10.96 10.12     G0 58 0
50 * sig CrB RS* 16 14 40.85557 +33 51 30.9497           F6V+G0V 508 0
51 V* U Her OH* 16 25 47.4719383584 +18 53 32.863368084 8.85 8.23 6.70     M6.5-8+e 563 1
52 Haro 1-6 Or* 16 26 03.0276684144 -24 23 36.188140848   14.15 14.01 12.38 10.80 K0 229 2
53 DoAr 51 Or* 16 32 11.7949720728 -24 40 21.640407420   13.89 13.65 12.43 11.025 K8IVe 76 0
54 2MASS J18311482-0203497 Y*O 18 31 14.8261452312 -02 03 49.987022364           B1 21 0
55 HD 179094 SB* 19 08 25.7885833200 +52 25 32.631746052   6.982 5.893     K1IIIe 207 1
56 V* RR Aql Mi* 19 57 36.0616870728 -01 53 11.339520360     7.80 7.45   M7.5e 305 2
57 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
58 HD 199178 Ro* 20 53 53.6520433056 +44 23 11.080108284   8.01 7.22     G5III-IV 222 1
59 V* SS Cyg CV* 21 42 42.8034497592 +43 35 09.867842484 11.07 12.651 12.032 9.326   K5V 1324 1
60 V* FF Aqr EB* 22 00 36.4255860432 -02 44 26.868642108   10.23 9.408   8.245 G8III+sdO 122 0
61 V* AR Lac RS* 22 08 40.8182089680 +45 44 32.107863120 7.09 6.83 6.11     K0IVe+G5IV 745 0
62 V* IM Peg RS* 22 53 02.2663977960 +16 50 28.300547040   7.024 5.890     K2III 357 1
63 V* SZ Psc RS* 23 13 23.7784875720 +02 40 31.602660924   8.19 7.44   6.390 G5Vp 333 1
64 V* PZ Cas s*r 23 44 03.2814215136 +61 47 22.190200476 12.80 11.48 8.90 6.08 3.90 M3Ia 210 0

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