A New Estimate of the Local Standard of Rest from Data on Young Objects
To estimate the peculiar velocity of the Sun with respect to the Local Standard of Rest (LSR), we use young objects in the Solar neighborhood with distance measurement errors within 10%–15%. These objects include the nearest Hipparcos O–B2.5 type stars, masers with VLBI trigonometric parallaxes, and...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2015-03-01
|
| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/astro-2017-0202 |
| _version_ | 1818734571894603776 |
|---|---|
| author | Bobylev V. V. Bajkova A. T. |
| author_facet | Bobylev V. V. Bajkova A. T. |
| author_sort | Bobylev V. V. |
| collection | DOAJ |
| description | To estimate the peculiar velocity of the Sun with respect to the Local Standard of Rest (LSR), we use young objects in the Solar neighborhood with distance measurement errors within 10%–15%. These objects include the nearest Hipparcos O–B2.5 type stars, masers with VLBI trigonometric parallaxes, and two samples consisting of the youngest and middle-aged Cepheids. The most significant component of motion of all these stars is induced by the spiral density wave. An analysis of all these samples, taking into account differential Galactic rotation and the effect of the spiral density wave, yields the following components of the vector of the peculiar velocity of the Sun with respect to the LSR: (U⊙, V⊙, W⊙)LSR = (6.0, 10.6, 6.5) ± (0.5, 0.8, 0.3) km s−1. We found the Solar velocity components (U⊙)LSR and (V⊙)LSR to be highly sensitive to the Solar radial phase χ⊙ in the spiral density wave. |
| first_indexed | 2024-12-18T00:07:29Z |
| format | Article |
| id | doaj.art-7b4f678821f648619835d411fc46cee3 |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-12-18T00:07:29Z |
| publishDate | 2015-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-7b4f678821f648619835d411fc46cee32022-12-21T21:27:45ZengDe GruyterOpen Astronomy2543-63762015-03-01241516110.1515/astro-2017-0202astro-2017-0202A New Estimate of the Local Standard of Rest from Data on Young ObjectsBobylev V. V.0Bajkova A. T.1 Central (Pulkovo) Astronomical Observatory of RAS, 65/1 Pulkovskoye Ch., St. Petersburg, Russian Federation Central (Pulkovo) Astronomical Observatory of RAS, 65/1 Pulkovskoye Ch., St. Petersburg, Russian FederationTo estimate the peculiar velocity of the Sun with respect to the Local Standard of Rest (LSR), we use young objects in the Solar neighborhood with distance measurement errors within 10%–15%. These objects include the nearest Hipparcos O–B2.5 type stars, masers with VLBI trigonometric parallaxes, and two samples consisting of the youngest and middle-aged Cepheids. The most significant component of motion of all these stars is induced by the spiral density wave. An analysis of all these samples, taking into account differential Galactic rotation and the effect of the spiral density wave, yields the following components of the vector of the peculiar velocity of the Sun with respect to the LSR: (U⊙, V⊙, W⊙)LSR = (6.0, 10.6, 6.5) ± (0.5, 0.8, 0.3) km s−1. We found the Solar velocity components (U⊙)LSR and (V⊙)LSR to be highly sensitive to the Solar radial phase χ⊙ in the spiral density wave.https://doi.org/10.1515/astro-2017-0202masersgalaxy: kinematics and dynamicsgalaxy: local standard of rest |
| spellingShingle | Bobylev V. V. Bajkova A. T. A New Estimate of the Local Standard of Rest from Data on Young Objects Open Astronomy masers galaxy: kinematics and dynamics galaxy: local standard of rest |
| title | A New Estimate of the Local Standard of Rest from Data on Young Objects |
| title_full | A New Estimate of the Local Standard of Rest from Data on Young Objects |
| title_fullStr | A New Estimate of the Local Standard of Rest from Data on Young Objects |
| title_full_unstemmed | A New Estimate of the Local Standard of Rest from Data on Young Objects |
| title_short | A New Estimate of the Local Standard of Rest from Data on Young Objects |
| title_sort | new estimate of the local standard of rest from data on young objects |
| topic | masers galaxy: kinematics and dynamics galaxy: local standard of rest |
| url | https://doi.org/10.1515/astro-2017-0202 |
| work_keys_str_mv | AT bobylevvv anewestimateofthelocalstandardofrestfromdataonyoungobjects AT bajkovaat anewestimateofthelocalstandardofrestfromdataonyoungobjects AT bobylevvv newestimateofthelocalstandardofrestfromdataonyoungobjects AT bajkovaat newestimateofthelocalstandardofrestfromdataonyoungobjects |