Skip to main content Accessibility help
×
Home
Hostname: page-component-559fc8cf4f-s5ss2 Total loading time: 0.489 Render date: 2021-03-03T15:40:26.789Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true }

Kinematics of OB-associations in the 3-kpc solar neighborhood

Published online by Cambridge University Press:  13 January 2020

Anna M. Melnik
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, 119991, Russia email: anna@sai.msu.ru
Andrei K. Dambis
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, 119991, Russia email: anna@sai.msu.ru Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia
Elena V. Glushkova
Affiliation:
Sternberg Astronomical Institute, Lomonosov Moscow State University, Universitetskii pr. 13, Moscow, 119991, Russia email: anna@sai.msu.ru Faculty of Physics, Lomonosov Moscow State University, Leninskie Gory 1-2, Moscow, 119991, Russia
Pertti Rautiainen
Affiliation:
Astronomy Research Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulun yliopisto, Finland
Corresponding
E-mail address:

Abstract

We use Gaia (DR1, DR2) stellar proper motions to study the kinematics of OB-associations. The average one-dimensional velocity dispersion inside 18 OB-associations with more than 10 Gaia DR1 stars is σv = 3.9 km s−1. The median virial and stellar masses of OB-associations are equal to 7×105 and 9 × 103 solar masses, respectively. The median star-formation efficiency is ε = 2.1%. We have found the expansion in several OB-associations. Models of the Galaxy with a two-component outer ring R1R2 can reproduce the average residual velocities of OB-associations in the Perseus, Sagittarius and Local System complexes.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020 

Access options

Get access to the full version of this content by using one of the access options below.

References

Blaha, C., Humphreys, R. M. 1989, AJ, 98, 1598 10.1086/115244CrossRefGoogle Scholar
Brown, A. G. A., Vallenari, A., Prusti, T. et al. 2018, A&A, 616, A1, Gaia DR2Google Scholar
Dias, W. S., Alessi, B. S., Moitinho, A., Lépine, J. R. D. 2002, A&A, 389, 871 Google Scholar
Efremov, Yu. N., Sitnik, T. G. 1988, Soviet Astron. Lett., 14, 347 Google Scholar
Evans, N. J., Dunham, M. M., Jorgensen, J. K. et al. 2009, ApJS, 181, 321 CrossRefGoogle Scholar
Collaboration, Gaia et al. 2016, A&A, 595, A1 Google Scholar
Collaboration, Gaia, et al. 2016 A&A, 595, A2 Google Scholar
Garcia, P., Bronfman, L., Nyman, L.-A., Dame, T. M., Luna, A. 2014, ApJS, 212, 2 CrossRefGoogle Scholar
Hills, J. G. 1980, ApJ, 225, 986 CrossRefGoogle Scholar
Kroupa, P. 2002, Science, 295, 82 10.1126/science.1067524CrossRefGoogle Scholar
Kroupa, P., Aarseth, S., Hurley, J. 2001, MNRAS, 321, 699 CrossRefGoogle Scholar
Krumholz, M. R., Matzner, C. D., McKee, C. F. 2006, ApJ, 653, 361 10.1086/508679CrossRefGoogle Scholar
Larson, R. B. 1981, MNRAS, 194, 809 CrossRefGoogle Scholar
Lindegren, L., Hernández, J., Bombrun, A. et al. 2018, A&A, 616, A2, Gaia DR2Google Scholar
Melnik, A. M. 2019, 485, 2106 CrossRefGoogle Scholar
Melnik, A. M., Dambis, A. K. 2017, MNRAS, 472, 3887 10.1093/mnras/stx2225CrossRefGoogle Scholar
Melnik, A. M., Dambis, A. K. 2018, submitted to MNRAS Google Scholar
Melnik, A. M., Rautiainen, P. 2009, Astron. Lett., 35, 609 CrossRefGoogle Scholar
Melnik, A. M., Rautiainen, P. 2011, MNRAS, 418, 2508 CrossRefGoogle Scholar
Melnik, A. M., Rautiainen, P., Glushkova, E.V., Dambis, A. K. 2016, Ap&SS, 361, 60 Google Scholar
Michalik, D., Lindegren, L., Hobbs, D. 2015, A&A, 574, 115 Google Scholar
Myers, P. C., Dame, T. M., Thaddeus, P. et al., 1986, ApJ, 301, 398 CrossRefGoogle Scholar
Rautiainen, P., Melnik, A. M. 2010, A&A 519, 70 Google Scholar
Sanders, D. B, Scoville, N. Z., Solomon, P. M. 1985, ApJ, 289, 373 CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 39 *
View data table for this chart

* Views captured on Cambridge Core between 13th January 2020 - 3rd March 2021. This data will be updated every 24 hours.

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Kinematics of OB-associations in the 3-kpc solar neighborhood
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Kinematics of OB-associations in the 3-kpc solar neighborhood
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Kinematics of OB-associations in the 3-kpc solar neighborhood
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *