From the Fire: A Deeper Look at the Phoenix Stream

K. Tavangar; P. Ferguson; N. Shipp; A. Drlica-Wagner; S. Koposov; D. Erkal; E. Balbinot; J. Garcia-Bellido; K. Kuehn; G. F. Lewis; T. S. Li; S. Mau; A. B. Pace; A. H. Riley; T. M. C. Abbott; M. Aguena; S. Allam; F. Andrade-Oliveira; J. Annis; E. Bertin; D. Brooks; D. L. Burke; A. Carnero Rosell; M. Carrasco Kind; J. Carretero; M. Constanzi; L. N. da Costa; M. E. S. Pereira; J. De Vicente; H. T. Diehl; S. Everett; Ferrero; B. Flaugher; J. Frieman; E. Gaztanaga; D. W. Gerdes; D. Gruen; R. A. Gruendl; J. Gschwend; G. Gutierrez; S. R. Hinton; D. L. Hollowood; K. Honscheid; D. J. James; N. Kuropatkin; M. A. G. Maia; J. L. Marshall; F. Menanteau; R. Miquel; R. Morgan; R. L. C. Ogando; A. Palmese; F. Paz-Chinchon; A. Pieres; A. A. Plazas Malagon; M. Rodriguez-Monroy; E. Sanchez; Scarpine; S. Serrano; Sevilla-Noarbe; M. Smith; E. Suchyta; M. E. C. Swanson; G. Tarle; C. To; T. N. Varga; A. R. Walker; DES Collaboration

doi:10.3847/1538-4357/ac399b

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From the Fire: A Deeper Look at the Phoenix Stream

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From the Fire: A Deeper Look at the Phoenix Stream

K. Tavangar, P. Ferguson, N. Shipp, A. Drlica-Wagner, S. Koposov, D. Erkal, E. Balbinot, J. Garcia-Bellido, K. Kuehn, G. F. Lewis, …

The Astrophysical journal, Vol.925(2), p.118

01/02/2022

DOI: https://doi.org/10.3847/1538-4357/ac399b

Abstract

Astronomy & Astrophysics

Physical Sciences

Science & Technology

We use 6 yr of data from the Dark Energy Survey to perform a detailed photometric characterization of the Phoenix stellar stream, a 15 degrees long, thin, dynamically cold, low-metallicity stellar system in the Southern Hemisphere. We use natural splines, a nonparametric modeling technique, to simultaneously fit the stream track, width, and linear density. This updated stream model allows us to improve measurements of the heliocentric distance (17.4 +/- 0.1 (stat.) +/- 0.8 (sys.) kpc) and distance gradient (-0.009 +/- 0.006 kpc deg(-1)) of Phoenix, which corresponds to a small change of 0.13 +/- 0.09 kpc in heliocentric distance along the length of the stream. We measure linear intensity variations on degree scales, as well as deviations in the stream track on similar to 2 degrees scales, suggesting that the stream may have been disturbed during its formation and/or evolution. We recover three peaks and one gap in linear intensity along with fluctuations in the stream track. Compared to other thin streams, the Phoenix stream shows more fluctuations and, consequently, the study of Phoenix offers a unique perspective on gravitational perturbations of stellar streams. We discuss possible sources of perturbations to Phoenix, including baryonic structures in the Galaxy and dark matter subhalos.

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Title: From the Fire: A Deeper Look at the Phoenix Stream
Creators: K. Tavangar - University of Chicago
P. Ferguson - University of Wisconsin–Madison
N. Shipp - University of Chicago
A. Drlica-Wagner - Fermi National Accelerator Laboratory
S. Koposov - University of Cambridge
D. Erkal - University of Surrey
E. Balbinot - University of Groningen
J. Garcia-Bellido - Autonomous University of Madrid
K. Kuehn - Lowell Observatory
G. F. Lewis - University of Sydney
T. S. Li - University of Toronto
S. Mau - Stanford University
A. B. Pace - Carnegie Mellon University
A. H. Riley - Mitchell Institute
T. M. C. Abbott - Cerro Tololo Inter-American Observatory
M. Aguena - Laboratório Interinstitucional de e-Astronomia
S. Allam - Fermi National Accelerator Laboratory
F. Andrade-Oliveira - Laboratório Interinstitucional de e-Astronomia
J. Annis - Fermi National Accelerator Laboratory
E. Bertin - Institut d'Astrophysique de Paris
D. Brooks - University College London
D. L. Burke - SLAC National Accelerator Laboratory
A. Carnero Rosell - Lab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil
M. Carrasco Kind - Clark Art Institute
J. Carretero - Institute for High Energy Physics
M. Constanzi - University of Trieste
L. N. da Costa - Laboratório Interinstitucional de e-Astronomia
M. E. S. Pereira - Universität Hamburg
J. De Vicente - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
H. T. Diehl - Fermi National Accelerator Laboratory
S. Everett - Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
Ferrero - University of Oslo
B. Flaugher - Fermi National Accelerator Laboratory
J. Frieman - University of Chicago
E. Gaztanaga - Institute of Space Sciences
D. W. Gerdes - University of Michigan–Ann Arbor
D. Gruen - Ludwig-Maximilians-Universität München
R. A. Gruendl - University of Illinois Urbana-Champaign
J. Gschwend - Laboratório Interinstitucional de e-Astronomia
G. Gutierrez - Fermi National Accelerator Laboratory
S. R. Hinton - University of Queensland
D. L. Hollowood - Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA
K. Honscheid - The Ohio State University
D. J. James - Center for Astrophysics Harvard & Smithsonian
N. Kuropatkin - Fermi National Accelerator Laboratory
M. A. G. Maia - Laboratório Interinstitucional de e-Astronomia
J. L. Marshall - Mitchell Institute
F. Menanteau - National Center for Supercomputing Applications
R. Miquel - Institute for High Energy Physics
R. Morgan - University of Wisconsin–Madison
R. L. C. Ogando - Valongo Observatory
A. Palmese - Fermi National Accelerator Laboratory
F. Paz-Chinchon - University of Cambridge
A. Pieres - Laboratório Interinstitucional de e-Astronomia
A. A. Plazas Malagon - Princeton University
M. Rodriguez-Monroy - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
E. Sanchez - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Scarpine - Fermi National Accelerator Laboratory
S. Serrano - Institut d'Estudis Espacials de Catalunya
Sevilla-Noarbe - Ctr Invest Energet Medioambientales & Tecnol CIEM, Madrid, Spain
M. Smith - University of Southampton
E. Suchyta - Oak Ridge National Laboratory
M. E. C. Swanson - National Center for Supercomputing Applications
G. Tarle - University of Michigan–Ann Arbor
C. To - Kavli Institute for Particle Astrophysics and Cosmology
T. N. Varga - Max Planck Institute for Extraterrestrial Physics
A. R. Walker - Cerro Tololo Inter-American Observatory
DES Collaboration
Publication Details: The Astrophysical journal, Vol.925(2), p.118
Publisher: IOP Publishing Ltd
Number of pages: 14
Date published: 01/02/2022
Grant note: AST-1138766; AST1536171 / National Science Foundation; National Science Foundation (NSF) AYA2015-71825; ESP2015-66861; FPA2015-68048; SEV-2016-0588; SEV-20160597; MDM-2015-0509 / MINECO; Spanish Government CERCA program of the Generalitat de Catalunya ERDF from the European Union CE110001020 / Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO); Australian Research Council DE-AC02-07CH11359 / U.S. Department of Energy, Office of Science, Office of High Energy Physics; United States Department of Energy (DOE) 465376/2014-2 / Brazilian Instituto Nacional de Ciencia e Tecnologia (INCT) e-Universe (CNPq); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Apoio a Pesquisa do Distrito Federal (FAPDF) 240672; 291329; 306478 / European Research Council under the European Union's Seventh Framework Program (FP7/2007-2013)
Identifiers: 99822520902346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

From the Fire: A Deeper Look at the Phoenix Stream

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