The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey
We study the faint stellar halo of isolated central galaxies, by stacking galaxy images in the HSC survey and accounting for the residual sky background sampled with random points. The surface brightness profiles in HSC \(r\)-band are measured for a wide range of galaxy stellar masses (\(9.2
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| creator | Wang, Wenting Han, Jiaxin Sonnenfeld, Alessandro Yasuda, Naoki Li, Xiangchong Jing, Yipeng More, Surhud Price, Paul A Lupton, Robert Rykoff, Eli Stark, David V Ting-Wen, Lan Takada, Masahiro Huang, Song Luo, Wentao Bahcall, Neta A Komiyama, Yutaka |
| description | We study the faint stellar halo of isolated central galaxies, by stacking galaxy images in the HSC survey and accounting for the residual sky background sampled with random points. The surface brightness profiles in HSC \(r\)-band are measured for a wide range of galaxy stellar masses (\(9.2 |
| doi_str_mv | 10.48550/arxiv.1811.04714 |
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The surface brightness profiles in HSC \(r\)-band are measured for a wide range of galaxy stellar masses (\(9.2<\log_{10}M_\ast/M_\odot<11.4\)) and out to 120 kpc. Failing to account for the stellar halo below the noise level of individual images will lead to underestimates of the total luminosity by \(\leq 15\%\). Splitting galaxies according to the concentration parameter of their light distributions, we find that the surface brightness profiles of low concentration galaxies drop faster between 20 and 100 kpc than those of high concentration galaxies. Albeit the large galaxy-to-galaxy scatter, we find a strong self-similarity of the stellar halo profiles. They show unified forms once the projected distance is scaled by the halo virial radius. The colour of galaxies is redder in the centre and bluer outside, with high concentration galaxies having redder and more flattened colour profiles. There are indications of a colour minimum, beyond which the colour of the outer stellar halo turns red again. This colour minimum, however, is very sensitive to the completeness in masking satellite galaxies. We also examine the effect of the extended PSF in the measurement of the stellar halo, which is particularly important for low mass or low concentration galaxies. The PSF-corrected surface brightness profile can be measured down to \(\sim\)31 \(\mathrm{mag}/\mathrm{arcsec}^2\) at 3-\(\sigma\) significance. PSF also slightly flattens the measured colour profiles.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.1811.04714</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Color ; Concentration gradient ; Galaxies ; Luminosity ; Physics - Astrophysics of Galaxies ; Self-similarity ; Sky surveys (astronomy) ; Stars & galaxies ; Stellar mass ; Surface brightness</subject><ispartof>arXiv.org, 2019-05</ispartof><rights>2019. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>http://arxiv.org/licenses/nonexclusive-distrib/1.0</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>228,230,780,784,885,27925</link.rule.ids><backlink>$$Uhttps://doi.org/10.48550/arXiv.1811.04714$$DView paper in arXiv$$Hfree_for_read</backlink><backlink>$$Uhttps://doi.org/10.1093/mnras/stz1339$$DView published paper (Access to full text may be restricted)$$Hfree_for_read</backlink></links><search><creatorcontrib>Wang, Wenting</creatorcontrib><creatorcontrib>Han, Jiaxin</creatorcontrib><creatorcontrib>Sonnenfeld, Alessandro</creatorcontrib><creatorcontrib>Yasuda, Naoki</creatorcontrib><creatorcontrib>Li, Xiangchong</creatorcontrib><creatorcontrib>Jing, Yipeng</creatorcontrib><creatorcontrib>More, Surhud</creatorcontrib><creatorcontrib>Price, Paul A</creatorcontrib><creatorcontrib>Lupton, Robert</creatorcontrib><creatorcontrib>Rykoff, Eli</creatorcontrib><creatorcontrib>Stark, David V</creatorcontrib><creatorcontrib>Ting-Wen, Lan</creatorcontrib><creatorcontrib>Takada, Masahiro</creatorcontrib><creatorcontrib>Huang, Song</creatorcontrib><creatorcontrib>Luo, Wentao</creatorcontrib><creatorcontrib>Bahcall, Neta A</creatorcontrib><creatorcontrib>Komiyama, Yutaka</creatorcontrib><title>The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey</title><title>arXiv.org</title><description>We study the faint stellar halo of isolated central galaxies, by stacking galaxy images in the HSC survey and accounting for the residual sky background sampled with random points. The surface brightness profiles in HSC \(r\)-band are measured for a wide range of galaxy stellar masses (\(9.2<\log_{10}M_\ast/M_\odot<11.4\)) and out to 120 kpc. Failing to account for the stellar halo below the noise level of individual images will lead to underestimates of the total luminosity by \(\leq 15\%\). Splitting galaxies according to the concentration parameter of their light distributions, we find that the surface brightness profiles of low concentration galaxies drop faster between 20 and 100 kpc than those of high concentration galaxies. Albeit the large galaxy-to-galaxy scatter, we find a strong self-similarity of the stellar halo profiles. They show unified forms once the projected distance is scaled by the halo virial radius. The colour of galaxies is redder in the centre and bluer outside, with high concentration galaxies having redder and more flattened colour profiles. There are indications of a colour minimum, beyond which the colour of the outer stellar halo turns red again. This colour minimum, however, is very sensitive to the completeness in masking satellite galaxies. We also examine the effect of the extended PSF in the measurement of the stellar halo, which is particularly important for low mass or low concentration galaxies. The PSF-corrected surface brightness profile can be measured down to \(\sim\)31 \(\mathrm{mag}/\mathrm{arcsec}^2\) at 3-\(\sigma\) significance. PSF also slightly flattens the measured colour profiles.</description><subject>Color</subject><subject>Concentration gradient</subject><subject>Galaxies</subject><subject>Luminosity</subject><subject>Physics - Astrophysics of Galaxies</subject><subject>Self-similarity</subject><subject>Sky surveys (astronomy)</subject><subject>Stars & galaxies</subject><subject>Stellar mass</subject><subject>Surface brightness</subject><issn>2331-8422</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GOX</sourceid><recordid>eNotj81KAzEYRYMgWGofwJUB11PzO0mXUtQKBRfW9fCZ-dKmpDM1mSmdt7c_ru7m3Ms9hDxwNlVWa_YM6RgOU245nzJluLohIyElL6wS4o5Mct4yxkRphNZyRL5XG6S5wxgh0Q3ElraehtxG6LCmDpsuQaRriHAMmGloaHcqLIY9JvrV71PYYTGHHQ07WIdmTXOfDjjck1sPMePkP8dk9fa6mi-K5ef7x_xlWYAWqijBIzowhkuoa66EtzOGGhE9M8BKK_0MrNeOe-eER_3jtDPCGKFK1NrLMXm8zl6cq_MbSEN1dq8u7ifi6UrsU_vbY-6qbdun5vSpElwKLSS3Sv4BvetdRA</recordid><startdate>20190504</startdate><enddate>20190504</enddate><creator>Wang, Wenting</creator><creator>Han, Jiaxin</creator><creator>Sonnenfeld, Alessandro</creator><creator>Yasuda, Naoki</creator><creator>Li, Xiangchong</creator><creator>Jing, Yipeng</creator><creator>More, Surhud</creator><creator>Price, Paul A</creator><creator>Lupton, Robert</creator><creator>Rykoff, Eli</creator><creator>Stark, David V</creator><creator>Ting-Wen, Lan</creator><creator>Takada, Masahiro</creator><creator>Huang, Song</creator><creator>Luo, Wentao</creator><creator>Bahcall, Neta A</creator><creator>Komiyama, Yutaka</creator><general>Cornell University Library, arXiv.org</general><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>GOX</scope></search><sort><creationdate>20190504</creationdate><title>The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey</title><author>Wang, Wenting ; Han, Jiaxin ; Sonnenfeld, Alessandro ; Yasuda, Naoki ; Li, Xiangchong ; Jing, Yipeng ; More, Surhud ; Price, Paul A ; Lupton, Robert ; Rykoff, Eli ; Stark, David V ; Ting-Wen, Lan ; Takada, Masahiro ; Huang, Song ; Luo, Wentao ; Bahcall, Neta A ; Komiyama, Yutaka</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a524-6afeeca7713add142f890e5eeef07a0683f9a8f5c1fcc2fe5bc5c7277246e55f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Color</topic><topic>Concentration gradient</topic><topic>Galaxies</topic><topic>Luminosity</topic><topic>Physics - Astrophysics of Galaxies</topic><topic>Self-similarity</topic><topic>Sky surveys (astronomy)</topic><topic>Stars & galaxies</topic><topic>Stellar mass</topic><topic>Surface brightness</topic><toplevel>online_resources</toplevel><creatorcontrib>Wang, Wenting</creatorcontrib><creatorcontrib>Han, Jiaxin</creatorcontrib><creatorcontrib>Sonnenfeld, Alessandro</creatorcontrib><creatorcontrib>Yasuda, Naoki</creatorcontrib><creatorcontrib>Li, Xiangchong</creatorcontrib><creatorcontrib>Jing, Yipeng</creatorcontrib><creatorcontrib>More, Surhud</creatorcontrib><creatorcontrib>Price, Paul A</creatorcontrib><creatorcontrib>Lupton, Robert</creatorcontrib><creatorcontrib>Rykoff, Eli</creatorcontrib><creatorcontrib>Stark, David V</creatorcontrib><creatorcontrib>Ting-Wen, Lan</creatorcontrib><creatorcontrib>Takada, Masahiro</creatorcontrib><creatorcontrib>Huang, Song</creatorcontrib><creatorcontrib>Luo, Wentao</creatorcontrib><creatorcontrib>Bahcall, Neta A</creatorcontrib><creatorcontrib>Komiyama, Yutaka</creatorcontrib><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Access via ProQuest (Open Access)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>arXiv.org</collection><jtitle>arXiv.org</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Wenting</au><au>Han, Jiaxin</au><au>Sonnenfeld, Alessandro</au><au>Yasuda, Naoki</au><au>Li, Xiangchong</au><au>Jing, Yipeng</au><au>More, Surhud</au><au>Price, Paul A</au><au>Lupton, Robert</au><au>Rykoff, Eli</au><au>Stark, David V</au><au>Ting-Wen, Lan</au><au>Takada, Masahiro</au><au>Huang, Song</au><au>Luo, Wentao</au><au>Bahcall, Neta A</au><au>Komiyama, Yutaka</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey</atitle><jtitle>arXiv.org</jtitle><date>2019-05-04</date><risdate>2019</risdate><eissn>2331-8422</eissn><abstract>We study the faint stellar halo of isolated central galaxies, by stacking galaxy images in the HSC survey and accounting for the residual sky background sampled with random points. The surface brightness profiles in HSC \(r\)-band are measured for a wide range of galaxy stellar masses (\(9.2<\log_{10}M_\ast/M_\odot<11.4\)) and out to 120 kpc. Failing to account for the stellar halo below the noise level of individual images will lead to underestimates of the total luminosity by \(\leq 15\%\). Splitting galaxies according to the concentration parameter of their light distributions, we find that the surface brightness profiles of low concentration galaxies drop faster between 20 and 100 kpc than those of high concentration galaxies. Albeit the large galaxy-to-galaxy scatter, we find a strong self-similarity of the stellar halo profiles. They show unified forms once the projected distance is scaled by the halo virial radius. The colour of galaxies is redder in the centre and bluer outside, with high concentration galaxies having redder and more flattened colour profiles. There are indications of a colour minimum, beyond which the colour of the outer stellar halo turns red again. This colour minimum, however, is very sensitive to the completeness in masking satellite galaxies. We also examine the effect of the extended PSF in the measurement of the stellar halo, which is particularly important for low mass or low concentration galaxies. The PSF-corrected surface brightness profile can be measured down to \(\sim\)31 \(\mathrm{mag}/\mathrm{arcsec}^2\) at 3-\(\sigma\) significance. PSF also slightly flattens the measured colour profiles.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.1811.04714</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Color Concentration gradient Galaxies Luminosity Physics - Astrophysics of Galaxies Self-similarity Sky surveys (astronomy) Stars & galaxies Stellar mass Surface brightness |
| title | The stellar halo of isolated central galaxies in the Hyper Suprime-Cam imaging survey |
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