Updates from the VVV Templates Project

Transcription

1 Pontificia Universidad Católica Departamento de Astronomía y Astrofísica Updates from the VVV Templates Project Rodolfo Angeloni on behalf of the VVV Templates Project Team

2 The VVV Templates Project Team Javier Alonso-García Rodolfo Angeloni Juan Carlos Beamin Cristobal Berger Jura Borissova * Márcio Catelan André-Nicolas Chené Carlos Contreras István Dékány Susana Eyheramendy Janghee Han Krzysztof Helminiak Maren Hempel Andrés Jordán Carlos Eduardo Lopes Camila Navarrete Claudio Navarro Paloma Perez Karim Pichara Alvaro Rojas Roberto Saito + many more local collaborators * Project leader

3 The primary goal of the VVV Templates Project is to build a statistically significant database of IR light curves for the automated classification of the VVV variable stars VVV Survey in numbers survey area ~ 520 sq. deg. > 33 globular clusters > 350 open clusters ~ 10 9 points sources ~ 10 6 variable stars

4 Variability tree A tentative organization of variable objects

5 The starting point The necessary high-quality templates that are needed for automated variable star classification algorithms are not available in the near-ir Type N (CoRoT) N (VVV) RRab Lyrae EA-type Classical Cepheids For many classes there are no data at all!

6 The starting point Example of well-sampled" light curves from the literature (ab-type RR Lyrae stars in the globular cluster Centauri - Del Principe et al. 2006).

7 The starting point Example of well-sampled" light curves from the literature (ab-type RR Lyrae stars in the globular cluster Centauri - Del Principe et al. 2006). Proper light curves templates of ab-type RR Lyrae stars in the globular cluster ω Centauri, by Jones et al. (1996). Templates data of this quality are seldom found in the literature.

8 Digging into the literature (Symbiotic) Mirae & Semiregular variables from Gromadzki et al. 2009

9 Digging into the literature R Coronae Borealis from Feast et al. 1997

10 Digging into the (unexplored) archives Wide Field Infrared Camera for UKIRT WFCAM Science Archive standard star calibration data from Lopes et al. (2012), in preparation

11 Digging into the (unexplored) archives Wide Field Infrared Camera for UKIRT WFCAM Science Archive standard star calibration data Variable Star Catalogue from WFCAM Today s talk: Session III, by Carlos Eduardo Lopes

12 We need (much) more data! We also started an independent monitoring of hundreds of (optically well-studied) variable stars in the JHKs bands, by securing observing time at several IR facilities across the world.

13 We need (much) more data! We also started an independent monitoring of hundreds of (optically well-studied) variable stars in the JHKs bands, by securing observing time at several IR facilities across the world.

14 Facilities around the world SMARTS 1,3m Telescope + ANDICAM K-band light curve of the delta Cephei star BD Pup (I. Dekany) ANDICAM FoV: 2,4 x2,4 pixel scale: 0,137 arcsec/pix

15 Facilities around the world INAF/REM 0,6m Telescope + REMIR K-band light curve of the type II Cepheid WY Sco (I. Dekany) REMIR FoV: 10 x10 pixel scale: 1.2 arcsec/pix

16 Facilities around the world SAAO/0,75m Telescope + MkII photometer K-band light curve of SX Phe, taken at the SAAO 0.75m Telescope in Sept Note the overall amplitude of 0.15 mag! Observer: Carlos Contreras

17 Facilities around the world SAAO/IRSF 1.4m Telescope + SIRPOL SIRPOL FoV: 7.7 x7.7 pixel scale: 0.45 arcsec/pix M62

18 Facilities around the world SAAO/IRSF 1.4m Telescope + SIRPOL Pursuing RR Lyrae template light curves in the globular clusters M62 Juan Carlos Beamin POSTER 02 M62 from the ABSTRACT Here we report advances in the acquisition of template light curves for RR Lyrae stars in the Globular Cluster M62 one of the richest clusters in terms of number of RR Lyrae stars.

19 Facilities around the world IAC/TCS 1.5m Telescope + CAIN III CAIN III FoV: 4.2 x4.2 pixel scale: 1 arcsec/pix

20 Facilities around the world IAC/TCS 1.5m Telescope + CAIN III Period-Luminosity relations for delta Scuti stars in open clusters Camila Navarrete POSTER 06 NGC7062 NGC1817 ABSTRACT Period-Luminosity relations were derived for low amplitude delta Scuti stars, from three open clusters, in J, H and Ks bands. The slope values found are in disagreement with the ones previously derived by King (1990). Nevertheless, we find that the slope values follow a behavior similar to that found for Cepheids stars, which is consistent with the expected ones for pulsating stars of Population I (Tsvetkov, 1988).

21 Facilities around the world IAC/TCS 1.5m Telescope + CAIN III Simultaneous optical monitoring with the Asiago Schmidt 67/92 Telescope VRI-JHK light curves of high-amplitude delta Scuti stars Claudio Navarro

22 Facilities around the world IAC/TCS 1.5m Telescope + CAIN III Simultaneous optical monitoring with the Asiago Schmidt 67/92 Telescope V R J K

23 Facilities around the world BOAO 1,8m Telescope + KASINICS IR Light Curve of BL Cam using BOAO in Korea. Preliminary result of VVV light curve templates Janghee Han POSTER 08 KASINICS FoV: 3,3 x3,3 pixel scale: 0,39 arcsec/pix

24 Facilities around the world ESO/VISTA 4m Telescope + VIRCAM Ongoing VISTA observations of the globular cluster Cen. Left panel: an example of variable star distribution across the cluster field: red circles mark the positions of known RR Lyrae stars, while blue squares mark the positions of known eclipsing binaries. Right panel: VIRCAM@VISTA's 16 detectors, with Cen at the center of the focal plane.

25 Facilities around the world ESO/VISTA 4m Telescope + VIRCAM Such a project will lead to high-quality light curves for more than 250 variables, greatly exceeding, both in quantity and in completeness of each individual light curve, what was achieved in previous near-ir studies of the cluster.

26 Local collaborators IAC-TCS (Spain) Aparicio, A. Guerrero de Escalant, E. M. Milone, A. - Murgas, F. Hidalgo, S. - Tata, R. KASI-BOAO (Korea) Young-Beom, J. Han, J. - Sohn, J. Sung, H. de Grijs, R. NAOJ-IRSF (Japan) Tamura, M. (VVV member) Hashimoto, J. Kuzuhara, N. Kwon, J. INAF REM (Italy) Fiaschi, M. - Ochner, P. Masetti, N. (VVV member) Tomasella, L. Siviero, A.

27 The primary goal of the VVV Templates Project is to build a statistically significant database of IR light curves for the automated classification of the VVV variable stars Active learning for light curves classification Next talk, by Cristobal Berger

28 To stay tuned