Comparing dark matter and MOND hyphotheses from the distribution function of A, F, early-G stars in the solar neighbourhood
ABSTRACT Dark matter is hypothetical matter assumed to address the historically known as missing mass problem in galaxies. However, alternative theories, such as Modified Newtonian Dynamics (MOND), have been notably successful in explaining the missing mass problem in various astrophysical systems....
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Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2024-11, Vol.534 (4), p.3387-3399 |
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creator | Syaifudin, M A Arifyanto, M I Wulandari, H R T Mulki, F A M |
description | ABSTRACT
Dark matter is hypothetical matter assumed to address the historically known as missing mass problem in galaxies. However, alternative theories, such as Modified Newtonian Dynamics (MOND), have been notably successful in explaining the missing mass problem in various astrophysical systems. The vertical distribution function of stars in the solar neighbourhood serves as a proxy to constrain galactic dynamics in accordance to its contents. We employ both the vertical positional and velocity distribution of stars in cylindrical coordinates with a radius of 150 pc and a half-height of 200 pc from the galactic plane. Our tracers consist of main-sequence A, F, and early-G stars from the GAIA, RAVE, APOGEE, GALAH, and LAMOST catalogues. We attempt to solve the missing mass in the solar neighbourhood, interpreting it as either dark matter or MOND. Subsequently, we compare both hypotheses Newtonian gravity with dark matter and MOND, using the Bayes factor (BF) to determine which one is more favoured by the data. We found that the inferred dark matter in the solar neighbourhood is in range of $\sim (0.01 \!-\! 0.07) \, \textrm {M}_{\odot } \, \textrm {pc}^{-3}$. The wide range of inferred dark matter density is caused by the peculiar behaviour of F-type stars, which could be a sign of dynamical disequilibrium. We also determine that the MOND hypothesis’s acceleration parameter $a_0$ is $(1.26 \pm 0.13) \times 10^{-10} \, \textrm {m} \, \textrm {s}^{-2}$ for simple interpolating function. The average of BF for all tracers between the two hypotheses is $\log \textrm {BF}\sim 0.1$, meaning no strong evidence in favour of either the dark matter or MOND hypotheses. |
doi_str_mv | 10.1093/mnras/stae2316 |
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Dark matter is hypothetical matter assumed to address the historically known as missing mass problem in galaxies. However, alternative theories, such as Modified Newtonian Dynamics (MOND), have been notably successful in explaining the missing mass problem in various astrophysical systems. The vertical distribution function of stars in the solar neighbourhood serves as a proxy to constrain galactic dynamics in accordance to its contents. We employ both the vertical positional and velocity distribution of stars in cylindrical coordinates with a radius of 150 pc and a half-height of 200 pc from the galactic plane. Our tracers consist of main-sequence A, F, and early-G stars from the GAIA, RAVE, APOGEE, GALAH, and LAMOST catalogues. We attempt to solve the missing mass in the solar neighbourhood, interpreting it as either dark matter or MOND. Subsequently, we compare both hypotheses Newtonian gravity with dark matter and MOND, using the Bayes factor (BF) to determine which one is more favoured by the data. We found that the inferred dark matter in the solar neighbourhood is in range of $\sim (0.01 \!-\! 0.07) \, \textrm {M}_{\odot } \, \textrm {pc}^{-3}$. The wide range of inferred dark matter density is caused by the peculiar behaviour of F-type stars, which could be a sign of dynamical disequilibrium. We also determine that the MOND hypothesis’s acceleration parameter $a_0$ is $(1.26 \pm 0.13) \times 10^{-10} \, \textrm {m} \, \textrm {s}^{-2}$ for simple interpolating function. The average of BF for all tracers between the two hypotheses is $\log \textrm {BF}\sim 0.1$, meaning no strong evidence in favour of either the dark matter or MOND hypotheses.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/stae2316</identifier><language>eng</language><publisher>London: Oxford University Press</publisher><subject>Acceleration ; Apogees ; Cylindrical coordinates ; Dark matter ; Distribution functions ; F stars ; G stars ; Galaxy distribution ; Hypotheses ; Missing mass (astrophysics) ; Neighborhoods ; Solar neighborhood ; Tracers ; Velocity distribution ; Vertical distribution ; Vertical orientation</subject><ispartof>Monthly notices of the Royal Astronomical Society, 2024-11, Vol.534 (4), p.3387-3399</ispartof><rights>2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. 2024</rights><rights>2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c226t-79fb3c8bd5111541e734f69779542c3115844fa65b7ec0ce6a5d7e66ead05cb13</cites><orcidid>0009-0004-8297-1130 ; 0000-0003-1551-519X ; 0000-0001-6062-0920 ; 0000-0001-7205-9472</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,860,1598,27901,27902</link.rule.ids></links><search><creatorcontrib>Syaifudin, M A</creatorcontrib><creatorcontrib>Arifyanto, M I</creatorcontrib><creatorcontrib>Wulandari, H R T</creatorcontrib><creatorcontrib>Mulki, F A M</creatorcontrib><title>Comparing dark matter and MOND hyphotheses from the distribution function of A, F, early-G stars in the solar neighbourhood</title><title>Monthly notices of the Royal Astronomical Society</title><description>ABSTRACT
Dark matter is hypothetical matter assumed to address the historically known as missing mass problem in galaxies. However, alternative theories, such as Modified Newtonian Dynamics (MOND), have been notably successful in explaining the missing mass problem in various astrophysical systems. The vertical distribution function of stars in the solar neighbourhood serves as a proxy to constrain galactic dynamics in accordance to its contents. We employ both the vertical positional and velocity distribution of stars in cylindrical coordinates with a radius of 150 pc and a half-height of 200 pc from the galactic plane. Our tracers consist of main-sequence A, F, and early-G stars from the GAIA, RAVE, APOGEE, GALAH, and LAMOST catalogues. We attempt to solve the missing mass in the solar neighbourhood, interpreting it as either dark matter or MOND. Subsequently, we compare both hypotheses Newtonian gravity with dark matter and MOND, using the Bayes factor (BF) to determine which one is more favoured by the data. We found that the inferred dark matter in the solar neighbourhood is in range of $\sim (0.01 \!-\! 0.07) \, \textrm {M}_{\odot } \, \textrm {pc}^{-3}$. The wide range of inferred dark matter density is caused by the peculiar behaviour of F-type stars, which could be a sign of dynamical disequilibrium. We also determine that the MOND hypothesis’s acceleration parameter $a_0$ is $(1.26 \pm 0.13) \times 10^{-10} \, \textrm {m} \, \textrm {s}^{-2}$ for simple interpolating function. The average of BF for all tracers between the two hypotheses is $\log \textrm {BF}\sim 0.1$, meaning no strong evidence in favour of either the dark matter or MOND hypotheses.</description><subject>Acceleration</subject><subject>Apogees</subject><subject>Cylindrical coordinates</subject><subject>Dark matter</subject><subject>Distribution functions</subject><subject>F stars</subject><subject>G stars</subject><subject>Galaxy distribution</subject><subject>Hypotheses</subject><subject>Missing mass (astrophysics)</subject><subject>Neighborhoods</subject><subject>Solar neighborhood</subject><subject>Tracers</subject><subject>Velocity distribution</subject><subject>Vertical distribution</subject><subject>Vertical orientation</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><sourceid>TOX</sourceid><recordid>eNqFkDFPwzAQhS0EEqWwMltiQmpaO47tZKwKLUiFLjBHjmM3KY0dbGeo-POYFmamezq9d_f0AXCL0RSjgsw644Sf-SBUSjA7AyNMGE3SgrFzMEKI0CTnGF-CK-93CKGMpGwEvha264VrzRbWwn3AToSgHBSmhi-b1wfYHPrGhkZ55aF2toNRw7r1wbXVEFproB6MPAqr4XwClxOohNsfkhWMVZyHrTlmvN0LB41qt01lB9dYW1-DCy32Xt38zjF4Xz6-LZ6S9Wb1vJivE5mmLCS80BWReVVTjDHNsOIk06zgvKBZKknc5VmmBaMVVxJJxQStuWJMiRpRWWEyBnenu72zn4PyodzFBia-LAlO80imoHl0TU8u6az3Tumyd20n3KHEqPwBXB4Bl3-AY-D-FLBD_5_3G5Vlf1s</recordid><startdate>20241101</startdate><enddate>20241101</enddate><creator>Syaifudin, M A</creator><creator>Arifyanto, M I</creator><creator>Wulandari, H R T</creator><creator>Mulki, F A M</creator><general>Oxford University Press</general><scope>TOX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0009-0004-8297-1130</orcidid><orcidid>https://orcid.org/0000-0003-1551-519X</orcidid><orcidid>https://orcid.org/0000-0001-6062-0920</orcidid><orcidid>https://orcid.org/0000-0001-7205-9472</orcidid></search><sort><creationdate>20241101</creationdate><title>Comparing dark matter and MOND hyphotheses from the distribution function of A, F, early-G stars in the solar neighbourhood</title><author>Syaifudin, M A ; Arifyanto, M I ; Wulandari, H R T ; Mulki, F A M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c226t-79fb3c8bd5111541e734f69779542c3115844fa65b7ec0ce6a5d7e66ead05cb13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Acceleration</topic><topic>Apogees</topic><topic>Cylindrical coordinates</topic><topic>Dark matter</topic><topic>Distribution functions</topic><topic>F stars</topic><topic>G stars</topic><topic>Galaxy distribution</topic><topic>Hypotheses</topic><topic>Missing mass (astrophysics)</topic><topic>Neighborhoods</topic><topic>Solar neighborhood</topic><topic>Tracers</topic><topic>Velocity distribution</topic><topic>Vertical distribution</topic><topic>Vertical orientation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Syaifudin, M A</creatorcontrib><creatorcontrib>Arifyanto, M I</creatorcontrib><creatorcontrib>Wulandari, H R T</creatorcontrib><creatorcontrib>Mulki, F A M</creatorcontrib><collection>Oxford Journals Open Access Collection</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Syaifudin, M A</au><au>Arifyanto, M I</au><au>Wulandari, H R T</au><au>Mulki, F A M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Comparing dark matter and MOND hyphotheses from the distribution function of A, F, early-G stars in the solar neighbourhood</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2024-11-01</date><risdate>2024</risdate><volume>534</volume><issue>4</issue><spage>3387</spage><epage>3399</epage><pages>3387-3399</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><abstract>ABSTRACT
Dark matter is hypothetical matter assumed to address the historically known as missing mass problem in galaxies. However, alternative theories, such as Modified Newtonian Dynamics (MOND), have been notably successful in explaining the missing mass problem in various astrophysical systems. The vertical distribution function of stars in the solar neighbourhood serves as a proxy to constrain galactic dynamics in accordance to its contents. We employ both the vertical positional and velocity distribution of stars in cylindrical coordinates with a radius of 150 pc and a half-height of 200 pc from the galactic plane. Our tracers consist of main-sequence A, F, and early-G stars from the GAIA, RAVE, APOGEE, GALAH, and LAMOST catalogues. We attempt to solve the missing mass in the solar neighbourhood, interpreting it as either dark matter or MOND. Subsequently, we compare both hypotheses Newtonian gravity with dark matter and MOND, using the Bayes factor (BF) to determine which one is more favoured by the data. We found that the inferred dark matter in the solar neighbourhood is in range of $\sim (0.01 \!-\! 0.07) \, \textrm {M}_{\odot } \, \textrm {pc}^{-3}$. The wide range of inferred dark matter density is caused by the peculiar behaviour of F-type stars, which could be a sign of dynamical disequilibrium. We also determine that the MOND hypothesis’s acceleration parameter $a_0$ is $(1.26 \pm 0.13) \times 10^{-10} \, \textrm {m} \, \textrm {s}^{-2}$ for simple interpolating function. The average of BF for all tracers between the two hypotheses is $\log \textrm {BF}\sim 0.1$, meaning no strong evidence in favour of either the dark matter or MOND hypotheses.</abstract><cop>London</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/stae2316</doi><tpages>13</tpages><orcidid>https://orcid.org/0009-0004-8297-1130</orcidid><orcidid>https://orcid.org/0000-0003-1551-519X</orcidid><orcidid>https://orcid.org/0000-0001-6062-0920</orcidid><orcidid>https://orcid.org/0000-0001-7205-9472</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Acceleration Apogees Cylindrical coordinates Dark matter Distribution functions F stars G stars Galaxy distribution Hypotheses Missing mass (astrophysics) Neighborhoods Solar neighborhood Tracers Velocity distribution Vertical distribution Vertical orientation |
title | Comparing dark matter and MOND hyphotheses from the distribution function of A, F, early-G stars in the solar neighbourhood |
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