galaxies: nuclei; galaxies: individual: NGC6384; Astrophysics - Astrophysics of Galaxies
Abstract :
[en] We analyse high spatial resolution near infrared (NIR) imaging of NGC 6384, a Milky Way like galaxy, using ARGOS commissioning data at the Large Binocular Telescope (LBT). ARGOS provides a stable PSFFWHM = 0{^''.}2-0{^''.}3 AO correction of the ground layer across the LUCI 2 NIR camera 4 × 4 arcmin field by using six laser guide stars (three per telescope) and a natural guide star for tip-tilt sensing and guiding. Enabled by this high spatial resolution, we analyse the structure of the nuclear star cluster (NSC) and the central kiloparsec of NGC 6384. We find via 2D modelling that the NSC (reff ≃ 10 pc) is surrounded by a small (reff ≃ 100 pc) and a larger Sersić (reff ≃ 400 pc), all embedded within the NGC 6384 large-scale boxy/X-shaped bulge and disc. This proof-of-concept study shows that with the high spatial resolution achieved by ground-layer AO we can push such analysis to distances previously only accessible from space. SED-fitting to the NIR and optical HST photometry allowed to leverage the age-metallicity-extinction degeneracies and derive the effective NSC properties of an young to old population mass ratio of 8 per cent with M_{\star ,old} ̃eq 3.5× 10^7 M_☉, Ageold, young = 10.9 ± 1.3 Gyr and 226 Myr ± 62 per cent, metallicity [M/H] = -0.11 ± 0.16, and 0.33± 39 per cent dex, and E(B - V) = 0.63 and 1.44 mag.
Georgiev I. Y., Goudfrooij P., Puzia T. H., 2012, MNRAS, 420, 1317
Georgiev I. Y., Goudfrooij P., Puzia T. H., Hilker M., 2008, AJ, 135, 1858
Gravity Collaboration, 2018, A&A, 615, L15
Hartmann M., Debattista V. P., Seth A., Cappellari M., Quinn T. R., 2011, MNRAS, 418, 2697
Hill J. M., 1994, American Astronomical Society Meeting Abstracts, p. 1322
Hill J. M., Green R. F., Ashby D. S., Brynnel J. G., Cushing N. J., Little J. K., Slagle J. H., Wagner R. M., 2012, in Stepp L. M., Gilmozzi R., Hal H. J., eds, Proc. SPIE Conf. Ser., Vol. 8444. Ground-based and Airborne Telescopes IV. SPIE, Bellingham, p. 84441A
Ho L. C., Filippenko A. V., Sargent W. L. W., 1997, ApJS, 112, 315
Häring-Neumayer N., Cappellari M., Rix H. W., Hartung M., Prieto M. A., Meisenheimer K., Lenzen R., 2006, ApJ, 643, 226
Kacharov N., Neumayer N., Seth A. C., Cappellari M., McDermid R., Walcher C. J., Böker T., 2018, MNRAS, 480, 1973
King I., 1962, AJ, 67, 471
Kormendy J., Kennicutt Robert C. J., 2004, ARA&A, 42, 603
Krist J. E., Hook R. N., Stoehr F., 2011, in Kahan M. A., ed., SPIE Conf. Ser., Vol. 8127. Optical Modeling and Performance Predictions V. SPIE, Bellingham
Larsen S. S., 1999, A&AS, 139, 393
Laurikainen E., Salo H., Buta R., Knapen J. H., 2011, MNRAS, 418, 1452
Makarov D., Prugniel P., Terekhova N., Courtois H., Vauglin I., 2014, A&A, 570, A13
Maraston C., 2005, MNRAS, 362, 799
McWilliam A., Zoccali M., 2010, ApJ, 724, 1491
Milosavljević M., 2004, ApJ, 605, L13
Méndez-Abreu J. et al., 2017, A&A, 598, A32
Ness M., Lang D., 2016, AJ, 152, 14
Neumayer N., Walcher C. J., 2012, Adv. Astron., 2012, 709038
Neumayer N., Walcher C. J., Andersen D., Sánchez S. F., Böker T., Rix H.-W., 2011, MNRAS, 413, 1875
Nguyen D. D. et al., 2018, ApJ, 858, 118
Noll S., Burgarella D., Giovannoli E., Buat V., Marcillac D., Muñoz-Mateos J. C., 2009, A&A, 507, 1793
Oh K. S., Lin D. N. C., 2000, ApJ, 543, 620
Ordenes-Briceño Y. et al., 2018, ApJ, 860, 4
Peng C. Y., Ho L. C., Impey C. D., Rix H.-W., 2010, AJ, 139, 2097
Portaluri E., Corsini E. M., Morelli L., Hartmann M., Dalla Bontà E., Debattista V. P., Pizzella A., 2013, MNRAS, 433, 434
Prieto M. A., Reunanen J., Tristram K. R. W., Neumayer N., Fernandez-Ontiveros J. A., Orienti M., Meisenheimer K., 2010, MNRAS, 402, 724
Rabien S. et al., 2018, A&A, 621, A4
Roehlly Y., Burgarella D., Buat V., Boquien M., Ciesla L., Heinis S., 2014, in Manset N., Forshay P., eds, ASP Conf. Ser., Vol. 485, Astronomical Data Analysis Software and Systems XXIII. Astron. Soc. Pac., San Francisco, p. 347
Rossa J., van der Marel R. P., Böker T., Gerssen J., Ho L. C., Rix H.-W., Shields J. C., Walcher C.-J., 2006, AJ, 132, 1074
Sarzi M. et al., 2016, MNRAS, 457, 1804
Schinnerer E., Böker T., Emsellem E., Lisenfeld U., 2006, ApJ, 649, 181
Schinnerer E., Böker T., Meier D. S., 2003, ApJ, 591, L115
Schlafly E. F., Finkbeiner D. P., 2011, ApJ, 737, 103
Schlegel D. J., Finkbeiner D. P., Davis M., 1998, ApJ, 500, 525
Schödel R., Feldmeier A., Kunneriath D., Stolovy S., Neumayer N., Amaro-Seoane P., Nishiyama S., 2014, A&A, 566, A47
Schödel R. et al., 2007, A&A, 469, 125
Schönrich R., Aumer M., Sale S. E., 2015, ApJ, 812, L21
Seifert W. et al., 2003, in Iye M., Moorwood A. F. M., eds, SPIE Conf. Ser., Vol. 4841. Instrument Design and Performance for Optical/Infrared Ground-based Telescopes. SPIE, Belligham, p. 962
Seth A. C., Blum R. D., Bastian N., Caldwell N., Debattista V. P., 2008, ApJ, 687, 997
Seth A. C., Dalcanton J. J., Hodge P. W., Debattista V. P., 2006, AJ, 132, 2539
Seth A. C. et al., 2010, ApJ, 714, 713
Sorce J. G., Tully R. B., Courtois H. M., Jarrett T. H., Neill J. D., Shaya E. J., 2014, MNRAS, 444, 527
Sánchez-Janssen R. et al., 2018, preprint (arXiv:1812.01019)
Tremaine S. D., Ostriker J. P., Spitzer L., Jr., 1975, ApJ, 196, 407
Tsang B. T. H., Milosavljević M., 2018, MNRAS, 478, 4142
Tsatsi A., Mastrobuono-Battisti A., van de Ven G., Perets H. B., Bianchini P., Neumayer N., 2017, MNRAS, 464, 3720
Walcher C. J., Böker T., Charlot S., Ho L. C., Rix H.-W., Rossa J., Shields J. C., van der Marel R. P., 2006, ApJ, 649, 692