A Spectroscopically Confirmed Double Source Plane Lens System in the Hyper Suprime-Cam Subaru Strategic Program

Tanaka, Masayuki; Wong, Kenneth C.; More, Anupreeta; Dezuka, Arsha; Egami, Eiichi; Oguri, Masamune; Suyu, S. H.; Sonnenfeld, Alessandro; Higuchi, Ryo; Komiyama, Yutaka; Miyazaki, Satoshi; Onoue, Masafusa; Oyamada, Shuri; Utsumi, Yousuke

doi:10.3847/2041-8205/826/2/l19

Cited by 26 publications

(31 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Therefore, in this paper, we only used S1. Since the Einstein radius of the S1 is 2.14±0.02 arcsec (Sonnenfeld et al 2019), M tot is (2.98±0.04)×10 12 M , which is ∼4.5 times the stellar mass of the lens galaxy (6.6 +0.7 −0.1 × 10 11 M , Tanaka et al 2016).…”

Section: Mass Within the Einstein Radiusmentioning

confidence: 97%

“…The total mass M tot projected on the sky plane within the Einstein radius can be calculated from the Einstein radius of the lens galaxy, and angular diameter distances to the lens galaxy, to the background source, and between the lens galaxy and the background source. The Eye of Horus has two background galaxies (S1 and S2 in Tanaka et al 2016) and Einstein radii. The Einstein radius of S2 is affected not only by the lens galaxy but also by S1 since S2 is located behind S1.…”

Section: Mass Within the Einstein Radiusmentioning

confidence: 99%

See 1 more Smart Citation

X-ray study of the double source plane gravitational lens system Eye of Horus observed with XMM–Newton

Tanaka

Tsuji

Akamatsu

et al. 2019

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

A double source plane (DSP) system is a precious probe for the density profile of distant galaxies and cosmological parameters. However, these measurements could be affected by the surrounding environment of the lens galaxy. Thus, it is important to evaluate the cluster-scale mass for detailed mass modeling. We observed the Eye of Horus, a DSP system discovered by the Subaru HSC-SSP, with XMM-Newton. We detected two X-ray extended emissions, originating from two clusters, one centered at the Eye of Horus, and the other located ∼ 100 arcsec northeast to the Eye of Horus. We determined the dynamical mass assuming hydrostatic equilibrium, and evaluated their contributions to the lens mass interior of the Einstein radius. The contribution of the former cluster is 1.1 +1.2 −0.5 × 10 12 M , which is 21 − 76% of the total mass within the Einstein radius. The discrepancy is likely due to the complex gravitational structure along the line of sight. On the other hand, the contribution of the latter cluster is only ∼ 2% on the Eye of Horus. Therefore, the influence associated with this cluster can be ignored.

show abstract

Section: Mass Within the Einstein Radiusmentioning

confidence: 97%

Section: Mass Within the Einstein Radiusmentioning

confidence: 99%

X-ray study of the double source plane gravitational lens system Eye of Horus observed with XMM–Newton

Tanaka

Tsuji

Akamatsu

et al. 2019

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

show abstract

“…Systems with references are previously known, whereas other objects with "..." are new. References: 1 2016), 9 Cabanac et al (2007), 10 Stark et al (2013), 11 Tanaka et al (2016), 12 Bolton et al (2008), 13 Faure et al (2008), 14 Hammer (1991), 15 Carrasco et al (2017), 16 Chan et al (2019), 17 Tyson et al (1990). acquired through three arms, the ultraviolet (UVB, λλ3,000 -5,500 Å), the visual (VIS, λλ5,000 -10,500 Å), and the near-infrared (NIR, λλ10,000 -25,000 Å).…”

Section: Spectroscopic Follow-upmentioning

confidence: 99%

Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) – V. Group-to-cluster scale lens search from the HSC–SSP Survey

Jaelani

Oguri

et al. 2020

Monthly Notices of the Royal Astronomical Society

Self Cite

View full text Add to dashboard Cite

We report the largest sample of candidate strong gravitational lenses belonging to the Survey of Gravitationally-lensed Objects in HSC Imaging for group-to-cluster scale (SuGOHI-c) systems. These candidates are compiled from the S18A data release of the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) Survey. We visually inspect ∼ 39, 500 galaxy clusters, selected from several catalogs, overlapping with the Wide, Deep, and UltraDeep fields, spanning the cluster redshift range 0.05 < z cl < 1.38. We discover 641 candidate lens systems, of which 537 are new. From the full sample, 47 are almost certainly bonafide lenses, 181 of them are highly probable lenses and 413 are possible lens systems. Additionally, we present 131 lens candidates at galaxy-scale serendipitously discovered during the inspection. We obtained spectroscopic follow-up of 10 candidates using the X-shooter. With this followup, we confirm 8 systems as strong gravitational lenses. Out of the remaining two, the lensed sources of one of them was too faint to detect any emission, and the source in the second system has redshift close to the lens but other additional arcs in this system are yet to be tested spectroscopically. Since the HSC-SSP is an ongoing survey, we expect to find ∼ 600 definite or probable lenses using this procedure and more if combined with other lens finding methods.

show abstract

“…Cabanac et al 2005;Buckley-Geer et al 2011;Bettinelli et al 2016), or by examining images of massive galaxies as possible lens, containing tens of thousands of luminous red galaxies (LRGs) and brightest cluster galaxies (BCG) (e.g. Lin et al 2009;Tanaka et al 2016 (Collett 2015); it is very difficult, if not im-possible, to visually inspect all the candidate LRG and BCG lenses in the big data to come 7 .…”

Section: Introductionmentioning

confidence: 99%

A Computer Vision Approach to Identify Einstein Rings and Arcs

Lee

2017

Publ. Astron. Soc. Aust.

View full text Add to dashboard Cite

Einstein rings are rare gem of the strong lensing phenomena. Unlike doubly or quadrouply lensed systems which only provide lens mass profile constraints at 1 or 2 position angles, the ring images can be used to probe the underlying lens gravitational potential at every single position angles, thus enable us to put much tighter constraints on the lens mass profile. In addition, the magnified and stretched images of the background source also enable us to probe properties of high-z galaxies with enhanced spatial resolution and higher signal to noise ratios, which is otherwise not possible for un-lensed galaxy studies. Despite their usefulness, only a handful of Einstein rings have been repoted up-to-date, mainly based on serendipitous discoveries or visual inspections of hundred thousands of massive galaxies -i.e. luminous red galaxies (LRG) -or galaxy clusters -i.e. brightest cluster galaxy (BCG). In the era of large sky survey, and with the upcoming surveys such as Large Synoptic Survey Telescope, visual inspection to discovery Einstein rings is very difficult, if not impossible, and an automated approach to identify ring pattern in the big data to come is in high demand. Here we present an Einstein ring recognition approach based on computer vision techniques. The workhorse of this approach is the circle Hough transform, which can recognise circular patterns or arcs at any given position with any radius in the images. We devise a two-tier approach: first pre-select LRGs associated with multiple blue objects as possible lens galaxies, than feed these possible lenses to Hough transform to identify Einstein rings and arcs. As a proof-of-concept, we investigate our apprach using the Sloan Digital Sky Surveys. Our results show a 100% completness, albeit a low purity at 40%. We also apply our approach to three newly discovered Einstein rings and arcs, in the Dark Energy Survey, Hyper Suprime-Cam Subaru Strategic Program, and UltraVISTA survey, illusting the versatiliy of our approach to on-going and up-coming large sky surveys in general. The beauty of our approach is that it is solely based on JPEG images, which can be easily obtained in batch mode from SDSS finding chart tools, without any pre-processing of the image. An implementation in Python will be available and can be downloaded from the author.

show abstract

A Spectroscopically Confirmed Double Source Plane Lens System in the Hyper Suprime-Cam Subaru Strategic Program

Cited by 26 publications

References 33 publications

X-ray study of the double source plane gravitational lens system Eye of Horus observed with XMM–Newton

X-ray study of the double source plane gravitational lens system Eye of Horus observed with XMM–Newton

Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI) – V. Group-to-cluster scale lens search from the HSC–SSP Survey

A Computer Vision Approach to Identify Einstein Rings and Arcs

Contact Info

Product

Resources

About