Is the vorticity vector of the Galaxy perpendicular to the Galactic plane? I - Precessional correction and equinoctial motion correction to the FK5 system

Miyamoto, M.; Sôma, Mitsuru

doi:10.1086/116467

Cited by 44 publications

(29 citation statements)

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“…Furthermore, the study supports evidence for the amendment of the recent correction of the equinox motion (Miyamoto & Sôma 1993) which apparently should be changed from −1.2 mas/yr to about −1.6 or even −2 mas/yr, which has the desirable consequence of diminishing the unusually large offset of the angular rotation about the z axis given in Eq. (17).…”

Section: Discussionsupporting

confidence: 77%

“…Neglecting ∆λ and putting ∆ω y = 0.12 and ∆ω z = −0.71 mas/yr as suggested by Table 3 we obtain with the figures of Case 1, Table 1 ∆p = −1.8 ± 0.4 mas/yr and ∆e = −1.6 ±0.5 mas/yr to be compared to the ∆e = −1.2 ±0.3 mas/yr as derived by Miyamoto & Sôma (1993).…”

Section: Side Effects Of the Correction Matrixmentioning

confidence: 64%

“…provided we put ∆e = (−1.2 ± 0.3) mas/yr as determined by Miyamoto & Sôma (1993) for the FK5 equinox motion, and omit ∆λ which has been proven to be negligibly small. One way of reconciling the solutions of Eqs.…”

Section: Formulation Of the Problemmentioning

confidence: 99%

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Precession from Hipparcos and FK5 proper motions compared with current values: Reasons for discrepancies

Walter¹,

Hering

2005

A&A

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Abstract. The comparison of Hipparcos and FK5 proper motions points to an inconsistency with the correction, ∆p, of the luni-solar precession derived from VLBI and LLR observations with unprecedented accuracy. An attempt is made to explain this inconsistency of approximately −1.3 mas/yr by rotational offsets of the Hipparcos and FK5 proper motion systems. In terms of right ascension and declination, these offsets give rise to proper motion offsets in the range of ±1 mas/yr on average which is not exceptional given the FK5 error budget. In the case of Hipparcos it is proven that the proper motions are not affected by rotational offsets larger than those indicated by the errors of the proper motion link to the ICRF. This result is obtained by analysing the Hipparcos proper motions in view of the existence of additional systematic motions other than those caused by galactic rotation and the parallactic motion of stars due to the solar motion with respect to the LSR. It is concluded that the Hipparcos proper motions are nearly free of unmodelled rotations, confirming that the Hipparcos frame is inertial at the accuracy level of the proper motion link to the ICRF. The gap between the estimated precessional corrections is bridged primarily by minor changes in the FK5 proper motions of the order of their errors, and only to a small extent by the elimination of a bias in the Hipparcos proper motions.

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Section: Discussionsupporting

confidence: 77%

Section: Side Effects Of the Correction Matrixmentioning

confidence: 64%

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Precession from Hipparcos and FK5 proper motions compared with current values: Reasons for discrepancies

Walter¹,

Hering

2005

A&A

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“…Only in such a way do we see a chance for the recognition of large scale features. Attempts in such a direction were made earlier, especially by Miyamoto and Soma (1993). They were based on classical astrometric catalogues of lower accuracy.…”

Section: Introductionmentioning

confidence: 99%

The galactic motion field of K0-5 giants from Hipparcos data

Brosche¹,

Schwan

Schwarz³

2001

Astron. Nachr.

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“…Kinoshita and Souchay took the conventional IAU1976 value (Lieske et al, 1977), whereas Williams (1994) adopted a correction of -3.266 mas/yr to this value, which corresponds to very recent VLBI and LLR observations , Herring, 1991, Mc. Carthy and Luzum, 1991, Steppe et al, 1993, Chariot et al, 1991, Miyamoto and Soma, 1993. The influence of this correction on the main 18.6 yr component of the nutation is about 1 mas in longitude and 0.6 mas in obliquity.…”

Section: The Recent Improvements In Rigid Earth Nutationmentioning

confidence: 97%

Recent Results of the Nutation Theory for a Rigid Earth

Souchay

Kinoshita

1995

Highlights astron.

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Abstract.Although the main questions remaining in the frame of the study of the nutation-precession phenomena concern principally the effects due to physical interactions, recent works have shown that even in the simplified case of a rigid Earth model of nutation, important changes have to be taken into account. Here we present the various steps having led to a more complete and more accurate rigid Earth nutation theory, since the pionnier work of Woolard (1953), insisting on the most recent improvements.

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Is the vorticity vector of the Galaxy perpendicular to the Galactic plane? I - Precessional correction and equinoctial motion correction to the FK5 system

Cited by 44 publications

References 0 publications

Precession from Hipparcos and FK5 proper motions compared with current values: Reasons for discrepancies

Precession from Hipparcos and FK5 proper motions compared with current values: Reasons for discrepancies

The galactic motion field of K0-5 giants from Hipparcos data

Recent Results of the Nutation Theory for a Rigid Earth

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