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Title: POLAR DISK GALAXY FOUND IN WALL BETWEEN VOIDS

Abstract

We have found an isolated polar disk galaxy in what appears to be a cosmological wall situated between two voids. This void galaxy is unique as its polar disk was discovered serendipitously in an H I survey of SDSS void galaxies, with no optical counterpart to the H I polar disk. Yet the H I mass in the disk is comparable to the stellar mass in the galaxy. This suggests slow accretion of the H I material at a relatively recent time. There is also a hint of a warp in the outer parts of the H I disk. The central, stellar disk appears relatively blue, with faint near-UV emission, and is oriented (roughly) parallel to the surrounding wall, implying gas accretion from the voids. The considerable gas mass and apparent lack of stars in the polar disk, coupled with the general underdensity of the environment, supports recent theories of cold flow accretion as an alternate formation mechanism for polar disk galaxies.

Authors:
;  [1]; ; ;  [2];  [3];  [4]
  1. Department of Astronomy, Columbia University, Mail Code 5246, 550 West 120th Street, New York, NY 10027 (United States)
  2. Kapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700 AV Groningen (Netherlands)
  3. Johns Hopkins University, 3701 San Martin Drive, Baltimore, MD 21218 (United States)
  4. Joseph Henry Laboratories, Princeton University, Princeton, NJ 08544 (United States)
Publication Date:
OSTI Identifier:
21300764
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal (Online)
Additional Journal Information:
Journal Volume: 696; Journal Issue: 1; Other Information: DOI: 10.1088/0004-637X/696/1/L6; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-4357
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; GALACTIC EVOLUTION; GALAXIES; MASS; STARS; UNIVERSE

Citation Formats

Stanonik, K, Van Gorkom, J H, Platen, E, Van de Weygaert, R, Van der Hulst, J M, Aragon-Calvo, M A, and Peebles, P J. E.,. POLAR DISK GALAXY FOUND IN WALL BETWEEN VOIDS. United States: N. p., 2009. Web. doi:10.1088/0004-637X/696/1/L6; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
Stanonik, K, Van Gorkom, J H, Platen, E, Van de Weygaert, R, Van der Hulst, J M, Aragon-Calvo, M A, & Peebles, P J. E.,. POLAR DISK GALAXY FOUND IN WALL BETWEEN VOIDS. United States. https://doi.org/10.1088/0004-637X/696/1/L6; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)
Stanonik, K, Van Gorkom, J H, Platen, E, Van de Weygaert, R, Van der Hulst, J M, Aragon-Calvo, M A, and Peebles, P J. E.,. 2009. "POLAR DISK GALAXY FOUND IN WALL BETWEEN VOIDS". United States. https://doi.org/10.1088/0004-637X/696/1/L6; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA).
@article{osti_21300764,
title = {POLAR DISK GALAXY FOUND IN WALL BETWEEN VOIDS},
author = {Stanonik, K and Van Gorkom, J H and Platen, E and Van de Weygaert, R and Van der Hulst, J M and Aragon-Calvo, M A and Peebles, P J. E.,},
abstractNote = {We have found an isolated polar disk galaxy in what appears to be a cosmological wall situated between two voids. This void galaxy is unique as its polar disk was discovered serendipitously in an H I survey of SDSS void galaxies, with no optical counterpart to the H I polar disk. Yet the H I mass in the disk is comparable to the stellar mass in the galaxy. This suggests slow accretion of the H I material at a relatively recent time. There is also a hint of a warp in the outer parts of the H I disk. The central, stellar disk appears relatively blue, with faint near-UV emission, and is oriented (roughly) parallel to the surrounding wall, implying gas accretion from the voids. The considerable gas mass and apparent lack of stars in the polar disk, coupled with the general underdensity of the environment, supports recent theories of cold flow accretion as an alternate formation mechanism for polar disk galaxies.},
doi = {10.1088/0004-637X/696/1/L6; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)},
url = {https://www.osti.gov/biblio/21300764}, journal = {Astrophysical Journal (Online)},
issn = {1538-4357},
number = 1,
volume = 696,
place = {United States},
year = {Fri May 01 00:00:00 EDT 2009},
month = {Fri May 01 00:00:00 EDT 2009}
}