New Polar-ring Atlas (NPA)

Interesting things
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Announcement: We will no longer be having our catalogue stored at this page, to view the catalog, please go here.

The New Polar-ring Atlas (NPA)

Based on various sky surveys, I’m producing a new catalog and atlas of polar-ring galaxies. Our list currently has over one thousand candidates, that need filtering; our candidates are derived from the polar-ring catalogs of PRC, SPRC & RM’s candidates. Many of these candidates we’ve found were not polar-ring galaxies; we will remove them from the sample. We also implement polar-ring galaxies discussed across the Galaxy Zoo and the Legacy Survey forums. I have inspected each candidate to account for any objects that need to be rejected. Finally, we used the George Stein Galaxy Finder and Cutout Image List Tool for DESI Legacy Imaging Surveys and More by Yao-Yuan Mao. for any additional polar-ring galaxy candidates.

If you believe you’ve found a polar-ring galaxy, please post it on the Polar-ring Galaxies thread.

The paper will continue below. And it will later be submitted in the literature.

You can access the catalog link here, including (almost) all known objects listed in polar-ring catalogs
https://www.legacysurvey.org/viewer/?catalog=tmp4etv31td#IC%20857

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To view the catalog, please go here.

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Manuscript for the journal:

The New Polar-ring Atlas: A New Atlas and Catalog of new and known galaxies exhibiting polar structures

Abstract: We present the New Polar-ring Atlas: a new photographic atlas and general catalog of galaxies exhibiting polar structures. The New Polar-ring Atlas contains all known galaxies, including new candidates that were discovered by the imagery of the Dark Energy Camera, specifically the DESI Legacy Imaging Surveys {2019AJ…157…168D} and the Hybrid-Supreme Camera, with the Hyper Suprime-Cam Subaru Strategic Program {2022PASJ…74…247A} The NPA consists of all known candidates, including the Polar-Ring Catalogue and photographic atlas of polar-ring galaxies (PRC) {1990AJ…100.1489W} the SDSS Polar-ring Catalogue (SPRC) {2011MNRAS.418…244M} {2012yCat…74180244M} and the new polar-ring galaxy candidates from the Sloan Digital Sky Survey. {2019MNRAS.483.1470R}, and additional new candidates or discoveries in the bibliography.

Introduction: Polar-ring galaxies (PRGs) are a rare class of ring galaxies where its ring of young stars, gas, and dust, are elongated and rotated perpendicular to the galaxy’s plane. {1990AJ…100.1489W} {2002A&A…391…117I} {2015MNRAS.447.2287R} Polar-ring galaxies can vary in various forms of morphology such as disks and spiral arms, and can also vary by their narrowness, thickness, and size, where the can range by a narrow ring, a wide annulus, a spindle, or an inner polar structure {2004A&A…416…889R} {2014ASPC…486…39} {2015AstL…41…748R} These polar-ring galaxies are thought to form from past interaction or accretion events or intergalactic medium filaments. {2003A&A…401…817B} {2006ApJ…636L…25M} {2008ApJ…689…678B} investigate the effects of galaxy interactions.

Although PRGs display unique morphological and physical traits, they are still rare. Around 440 potential PRGs have been discovered so far. {1990AJ…100.1489W} {2011MNRAS.418…244M} {2019MNRAS.483.1470R} Nevertheless, only a limited number of PRGs have been officially confirmed through spectroscopic or kinematic observations due to the difficulty of the confirmation process. {1990AJ…100.1489W} {2011AstL…37…171R} {2014ASPC…486…71M} By using photometry to discover potential PRG candidates, we can simplify the process of choosing which ones to observe spectroscopically and improve the rate of confirmation. Identifying and verifying new PRGs is significant because they provide distinct chances to research galaxy dynamics, grasp the development of unusual formations, explore the impact of galaxy interactions, and examine the characteristics of dark matter. {2004ASSL…319…57C} {2013MNRAS.432.2846L} {2014MNRAS.441.2650K} {2016A&A…585A.156O}

A New Catalogue of Polar-ring Galaxies: A new general catalog of polar-ring galaxies is presented, this being the catalogues of polar-ring galaxies, being revised, corrected, and enlarged, resulting from the mergers of various references, including the Polar-Ring Catalogue and photographic atlas of polar-ring galaxies (PRC) {1990AJ…100.1489W} the SDSS Polar-ring Catalogue (SPRC) {2011MNRAS.418…244M} {2012yCat…74180244M} and the new polar-ring galaxy candidates from the Sloan Digital Sky Survey. {2019MNRAS.483.1470R}, and additional new candidates or discoveries in the bibliography. New PRG candidates have been added from various sky surveys including the DESI Legacy Imaging Surveys DR10, {2019AJ…157…168D} and the Hybrid-Supreme Camera, with the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) {2022PASJ…74…247A}, basically constructed from various forums and natural and artificial intelligence.

image
image1064×413 47.8 KB

Figure 1 - DESI Legacy Imaging Surveys (DR10 grz) images of three new potential polar-ring galaxy candidates of high confidence.

Out of over 1,200 candidates, more than one-half are suspected to be new. The catalog is expected to contain cross-identifications of the polar-ring galaxies from the PRC, {1990AJ…100.1489W} SPRC, {2011MNRAS.418…244M} {2012yCat…74180244M} Reshetnikov’s and Moiseev’s catalogue of 31 new polar-ring galaxy candidates. {2019MNRAS.483.1470R}, The cross-identifications will also come from known sources in the Siena Galaxy Atlas {2023ApJS…269…3M} if available—photometric data from the DESI Legacy Imaging Surveys DR9 DR10. {2019AJ…157…168D}

Content and Arrangement of the Catalogue: The catalogue of the polar-ring galaxies is based upon positional and cross-identifiable matches with the Siena Galaxy Atlas {2023ApJS…269…3M} and the Legacy Survey photometrical catalogs {2019AJ…157…168D} in the catalogue. The catalog will be arranged into many distinct columns:

!!! Will be present in the final draft on the NPA. !!!

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Overlay of all galaxies that have been classified or included in PRG catalogs
https://www.legacysurvey.org/viewer/?catalog=tmp5qw4dam4#NGC%205002

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I made a gallery of all the polar-ring galaxies for an easy image identification. Enjoy!

There are some that are spurious because I included all the NPA, PRC, SPRC and RM galaxies into this list. Made by the use of Cutout Image List Tool for DESI Legacy Imaging Surveys and More by Yao-Yuan Mao.

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thanks for that :+1:

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Great!
I’ve been using this Python code to download cutouts, and it might be useful.
We can also use the same URL to download the FITS data with the same size.

def get_jpgcut(galid,ra,dec):
    url = 'https://www.legacysurvey.org/viewer/cutout.jpg?ra={}&dec={}&%22/pix=0.25&layer=ls-dr9&size=500'.format(ra, dec)
    print(url)
    res = requests.get(url, stream = True)
    file_name = direct_i+'NGC{}.jpg'.format(galid)
    if res.status_code == 200:
        with open(file_name,'wb') as f:
            shutil.copyfileobj(res.raw, f)
        print('Image sucessfully Downloaded: ',file_name)
    else:
        print('Image Couldn\'t be retrieved')
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Hello all. I have an announcement, in which I added back the lists from being deleted because some users are having trouble accessing this webpage, especially on Mobile browsers.

There have been some problems creating these lists because of the maximum character limit to reply to a certain topic, so the tables will only show the RA and Dec values and are being rounded to the nearest hundredth.

The full information will remain available on the Google Sheet files.

Have a wonderful day!
-chris

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Plan for 2025:

  1. Query GLADE+ galaxies by limiting the sample to < 18th magnitude, and identify PRGs and interesting galaxies picked up in the sample using the cutout image list tool
  2. Query the galaxy similarity searcher by comparing all candidates and identifying potential PRGs from the data table
  3. Create accurate positions and z-values using the Legacy Surveys photometrical catalogs and query Siena Galaxy Atlas (2024b) to identify D(26), b/a, and PA.
  4. Query morphology and characteristics of PRG candidates, arrange them into categories of chance and classification
  5. Plan for publication and finish manuscript
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