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In this paper we present the results of a search for members of the globular cluster Palomar 5 and its associated tidal tails. The analysis has been performed using intermediate and low resolution spectroscopy with the AAOmega spectrograph…

星系天体物理 · 物理学 2015-06-23 Pete Kuzma , Gary Da Costa , Stefan Keller , Elizabeth Maunder

We report the discovery of two well-defined tidal tails emerging from the sparse remote globular cluster Palomar 5. These tails stretch out symmetrically to both sides of the cluster in the direction of constant Galactic latitude and…

Using Data Release 4 of the Sloan Digital Sky Survey, we have applied an optimal contrast, matched filter technique to trace the trailing tidal tail of the globular cluster Palomar 5 to a distance of 18.5 degrees from the center of the…

天体物理学 · 物理学 2009-11-11 C. J. Grillmair , O. Dionatos

We present the results of a detailed search for members of the Pal 5 tidal tail system in Gaia Data Release 2 (DR2). Tidal tails provide a sensitive method for measuring the current and past gravitational potential of their host galaxy as…

星系天体物理 · 物理学 2020-03-04 Nathaniel Starkman , Jo Bovy , Jeremy Webb

Using wide-field photometric data from the Sloan Digital Sky Survey (SDSS) we recently showed that the Galactic globular cluster Palomar 5 is in the process of being tidally disrupted. Its tidal tails were initially detected in a 2.5 degree…

Thin stellar streams, formed from the tidal disruption of globular clusters, are important gravitational tools, sensitive to both global and small-scale properties of dark matter. The Palomar 5 stellar stream (Pal 5) is an exemplar stream…

星系天体物理 · 物理学 2020-02-06 Adrian M. Price-Whelan , Cecilia Mateu , Giuliano Iorio , Sarah Pearson , Ana Bonaca , Vasily Belokurov

We detected extended, curved stellar tidal tails emanating from the sparse, disrupting halo globular cluster Pal 5, which cover 10 degrees on the sky. These streams allow us to infer the orbit of Pal 5 and to ultimately constrain the…

Stars that escape globular clusters form tidal tails that are predominantly shaped by the global distribution of mass in the Galaxy, but also preserve a historical record of small-scale perturbations. Using deep $grz$ photometry from…

The Sixth Data Release (DR6) in the Sloan Digital Sky Survey (SDSS) provides more photometric regions, new features and more accurate data around globular cluster Palomar 5. A new method, Back Propagation Neural Network (BPNN), is used to…

天体物理仪器与方法 · 物理学 2011-05-19 H. Zou , Z. -Y. Wu , J. Ma , X. Zhou

Using photometry and proper motions from Gaia Data Release 2, we detect a 50 degree-long stream of about 70 stars extending westward from the halo globular cluster M5. Based on the similarities in distance, proper motions, inferred…

星系天体物理 · 物理学 2019-11-06 Carl J. Grillmair

Using the Optimal Filter Technique applied to Sloan Digital Sky Survey photometry, we have found extended tails stretching about 1 degree (or several tens of half-light radii) from either side of the ultra-faint globular cluster Palomar 1.…

星系天体物理 · 物理学 2015-05-19 M. Niederste-Ostholt , V. Belokurov , N. W. Evans , S. Koposov , M. Gieles , M. J. Irwin

We present two spectroscopic surveys of the tidal stellar stream of the Palomar 5 globular cluster, undertaken with the VLT/FLAMES and AAT/AAOmega instruments. We use these data in conjunction with photometric data presented in the previous…

星系天体物理 · 物理学 2017-08-30 Rodrigo A. Ibata , Geraint F. Lewis , Guillaume Thomas , Nicolas F. Martin , Scott Chapman

In the last decade, observational studies have shown the existence of tidal streams in the outer part of many galactic globular clusters. The most striking examples of clusters with well defined tidal tails are represented by Palomar 5 and…

天体物理学 · 物理学 2007-05-23 P. Di Matteo , R. Capuzzo Dolcetta , P. Miocchi , M. Montuori

Recent Pan-STARRS data show that the leading arm from the globular cluster Palomar 5 (Pal 5) appears shorter than the trailing arm, while simulations of Pal 5 predict similar angular extents. We demonstrate that including the spinning…

星系天体物理 · 物理学 2017-11-01 Sarah Pearson , Adrian M. Price-Whelan , Kathryn V. Johnston

We use photometry from the DECam Legacy Survey to detect candidate tidal tails extending ~5 deg on either side of the Palomar 13 globular cluster. The tails are aligned with the proper motion of Palomar 13 and are consistent with its old,…

星系天体物理 · 物理学 2020-11-11 Nora Shipp , Adrian Price-Whelan , Kiyan Tavangar , Cecilia Mateu , Alex Drlica-Wagner

In this paper we report a study (see Mastrobuono-Battisti et al., 2012) about the formation and characteristics of the tidal tails around Palomar 5 along its orbit in the Milky Way potential, by means of direct N-body simulations and…

星系天体物理 · 物理学 2013-04-25 Alessandra Mastrobuono-Battisti , Paola Di Matteo , Marco Montuori , Misha Haywood

This paper presents an example where the morphology of a single stellar stream can be used to rule out a specific galactic potential form without the need for velocity information. We investigate the globular cluster Palomar5 (Pal 5), which…

星系天体物理 · 物理学 2016-04-01 Sarah Pearson , Andreas H. W. Küpper , Kathryn V. Johnston , Adrian M. Price-Whelan

Palomar 5 (Pal 5) is a faint halo globular cluster associated with narrow tidal tails. It is a useful system to understand the process of tidal dissolution, as well as to constrain the potential of the Milky Way. A well-determined orbit for…

星系天体物理 · 物理学 2016-09-05 Tobias K. Fritz , Nitya Kallivayalil

We report the discovery of tidal tails around the two outer halo globular clusters, Eridanus and Palomar 15, based on $gi$-band images obtained with DECam at the CTIO 4-m Blanco Telescope. The tidal tails are among the most remote stellar…

星系天体物理 · 物理学 2018-01-25 G. C. Myeong , Helmut Jerjen , Dougal Mackey , Gary S. Da Costa

The dynamical evolution of a single globular cluster and also of the entire Galactic globular cluster system has been studied theoretically in detail. In particular, simulations show how the 'lost' stars are distributed in tidal tails…

星系天体物理 · 物理学 2015-05-19 Katrin Jordi , Eva K. Grebel
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