Skip to main content
×
×
Home

Observing merger trees in a new light

  • Rhys J. J. Poulton (a1) (a2), Aaron S. G. Robotham (a1) (a2), Chris Power (a1) (a2) and Pascal J. Elahi (a1) (a2)
Abstract

Merger trees harvested from cosmological N-body simulations encode the assembly histories of dark matter halos over cosmic time and are a fundamental component of semi-analytical models of galaxy formation. The ability to compare the tools used to construct merger trees, namely halo finders and tree building algorithms, in an unbiased and systematic manner is critical to assess the quality of merger trees. In this paper, we present the dendrogram, a novel method to visualise merger trees, which provides a comprehensive characterisation of a halo’s assembly history—tracking subhalo orbits, halo merger events, and the general evolution of halo properties. We show the usefulness of the dendrogram as a diagnostic tool of merger trees by comparing halo assembly simulation analysed with three different halo finders—VELOCIraptor, AHF, and Rockstar—and their associated tree builders. Based on our analysis of the resulting dendrograms, we highlight how they have been used to motivate improvements to VELOCIraptor. The dendrogram software is publicly available online, at: https://github.com/rhyspoulton/MergerTree-Dendrograms.

Copyright
Corresponding author
Author for correspondence: Rhys J. J. Poulton, Email: rhys.poulton@icrar.org
References
Hide All
Avila, S., et al. 2014, MNRAS, 441, 3488
Baugh, C. M. 2006, Rep. Prog. Phys., 69, 3101
Behroozi, P. S.,Wechsler, R. H., & Wu, H.-Y. 2013a, ApJ, 762, 109
Behroozi, P. S., Wechsler, R. H., Wu, H.-Y., Busha, M. T., Klypin, A. A., & Primack, J. R. 2013b, ApJ, 763, 18
Behroozi, P., et al. 2015, MNRAS, 454, 3020
Benson, A. J. 2010, Physics Reports, 495, 33
Boylan-Kolchin, M., Ma, C.-P., & Quataert, E. 2008, MNRAS, 383, 93
Bryan, G. L., & Norman, M. L. 1998, ApJ, 495, 80
Cañas, R., Elahi, J. P., Welker, C., Lagos, C. P., Power, C., Dubois, Y., & Pichon, C. 2018, arXiv:1806.11417 [astro-ph.GA]
Cautun, M., Hellwing, W. A. van de Weygaert, R., Frenk, C. S., Jones, B. J. T., Sawala, T. 2014, MNRAS, 445, 1820
Cole, S. 1991, ApJ, 367, 45
Davis, M., Efstathiou, G., Frenk, C. S., & White, S. D. M. 1985, ApJ, 292, 371
De Lucia, G., & Blaizot, J. 2007, MNRAS, 375, 2
Elahi, P. J., Thacker, R. J., & Widrow, L. M. 2011, MNRAS, 418, 320
Elahi, P. J., et al. 2013, MNRAS, 433, 1537
Elahi, P. J., Welker, C., Power, C., Lagos, C. d. P., Robotham, A. S. G., Canas, R., Poulton, R. 2018, MNRAS, 475, 5338
Gill, S. P. D., Knebe, A., & Gibson, B. K. 2004, MNRAS, 351, 399
Guo, Q., et al. 2011, MNRAS, 413, 101
Hirschmann, M., Naab, T., Ostriker, J. P., Forbes, D. A., Duc, P.-A., DavÃl’, R., Oser, L., & Karabal, E. 2015, MNRAS, 449, 528
Knebe, A., et al. 2011, MNRAS, 415, 2293
Knebe, A., et al. 2013, MNRAS, 435, 1618
Knollmann, S. R., & Knebe, A. 2009, ApJ, 182, 608
Lacey, C., & Cole, S. 1993, MNRAS, 262, 627
Lacey, C. & Silk, J. 1991, ApJ, 381, 14
Lagos, C. P., Tobar, T. J., Robotham, A. S. G., Obreschkow, D.,Mitchell, P. D., Power, C., & Elahi, J. P. 2018, MNRAS, 481, 3573
McAlpine, S., et al. 2016, Astron. Comput., 15, 72
Muldrew, S. I., et al. 2012, MNRAS, 419, 2670
Naab, T., & Ostriker, J. P. 2017, ARA&A, 55, 59
Onions, J. et al. 2012, MNRAS, 423, 1200
Onions, J. et al. 2013, MNRAS, 429, 2739
Parzen, E. 1962, Ann. Math. Statist., 33, 1065
Planck Collaboration 2015, A&A, 594, A13
Poole, G. B., Mutch, S. J., Croton, D. J., & Wyithe, S. 2017, MNRAS, 472, 3659
Press, W. H., & Schechter, P. 1974, ApJ, 187, 425
Pujol, A., et al. 2017, MNRAS, 469, 749
Robotham, A. S. G., et al., 2011, MNRAS, 416, 2640
Rosenblatt, M. 1956, Ann. Math. Statist., 27, 832
Roukema, B. F., Peterson, B. A., Quinn, P. J., & Rocca-Volmerange, B. 1997, MNRAS, 292, 835
Somerville, R. S., & Davé, R. 2015, ARA&A, 53, 51
Springel, V., et al. 2005, Nature, 435, 629
Srisawat, C., et al. 2013, MNRAS, 436, 150
Thomas, P. A., et al. 2015, arXiv:1508.05388 [astro-ph]
Tweed, D., Devriendt, J., Blaizot, J., Colombi, S., & Slyz, A. 2009, A&A, 506, 647
Wang, Y., et al. 2016, MNRAS, 459, 1554
White, S. D. M., & Frenk, C. S. 1991, ApJ, 379, 52
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Publications of the Astronomical Society of Australia
  • ISSN: 1323-3580
  • EISSN: 1448-6083
  • URL: /core/journals/publications-of-the-astronomical-society-of-australia
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed