Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-28T02:12:06.973Z Has data issue: false hasContentIssue false
  • English
  • Français

Large Scale Structure in the Inner Milky Way

Published online by Cambridge University Press:  17 July 2015

I. Simion  and
V. Belokurov
I. Simion*
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
V. Belokurov
Affiliation:
Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK
*
e-mail: [email protected]
Get access

Abstract

We study the structure of the inner Milky Way using the latest data release of the Vista Variables in the Via Lactea (VVV) survey. VVV is a deep near-infrared, multi-colour (Z,Y,J,H, Ks) photometric survey with a coverage of 320 square degrees towards the bulge region. We use the photometric properties of red clump (RC) stars to build a high resolution (1′× 1′) extinction map which we use to de-redden the photometry. From the colour-magnitude diagrams we extract the red giant branch population to investigate its 3D density distribution in the central 4–12 kpc of the MW. In the very central regions of the bulge, at |l| < 4∘ and |b| < 2.5∘, we find a high significance overdensity not described by a simple density model.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 68: The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases , 2014 , pp. 177 - 181
Copyright
© EAS, EDP Sciences, 2015

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Athanassoula, E., 2005, MNRAS, 358, 1477CrossRef
Bureau, M., Aronica, G., Athanassoula, E., et al., 2006, MNRAS, 370, 753CrossRef
Di Matteo, P., Haywood, M., Gómez, A., et al., 2014, A&A, 567, A122
Dwek, E., Arendt, R.G., Hauser, M.G., et al., 1995, ApJ, 445, 716CrossRef
Freudenreich, H.T., 1998, ApJ, 492, 495CrossRef
Gerhard, O., & Martinez-Valpuesta, I., 2012, ApJ, 744, L8CrossRef
Gonzalez, O.A., Rejkuba, M., Minniti, D., et al., 2011, A&A, 534, L14PubMed
Martinez-Valpuesta, I., Shlosman, I., & Heller, C., et al., 2006, ApJ, 637, 214CrossRef
Minniti, D., Lucas, P.W., Emerson, J.P., Saito, R.K., et al., 2010, VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way, 15, 433 [arXiv:0912.1056]
Ness, M., Debattista, V.P., Bensby, T., et al., 2014, ApJ, 787, L19CrossRef
Robin, A.C., Reylé, C., Derrière, S., et al., 2003, A&A, 409, 523
Robin, A.C., Reylé, C., Fliri, J., et al., 2014, A&A, 569, A13
Schultheis, M., Zasowski, G., Allen de Prieto, C., et al., 2014, AJ, 148, 24CrossRef
Sharma, S., Bland-Hawthorn, J., Johnston, K.V., et al., 2011, ApJ, 730, 3CrossRef