MASSIVE BINARIES IN THE VICINITY OF Sgr A
A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the supermassive black hole Sgr A* revealed two new binaries: a long-period Ofpe/WN9 binary, IRS 16NE, with a modest eccentricity of 0.3 and a period of 224 days, and an eclipsing Wolf-Rayet bi...
Gespeichert in:
Veröffentlicht in: | The Astrophysical journal 2014-02, Vol.782 (2), p.1-10 |
---|---|
Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
container_end_page | 10 |
---|---|
container_issue | 2 |
container_start_page | 1 |
container_title | The Astrophysical journal |
container_volume | 782 |
creator | Pfuhl, O Alexander, T Gillessen, S Martins, F Genzel, R Eisenhauer, F Fritz, T K Ott, T |
description | A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the supermassive black hole Sgr A* revealed two new binaries: a long-period Ofpe/WN9 binary, IRS 16NE, with a modest eccentricity of 0.3 and a period of 224 days, and an eclipsing Wolf-Rayet binary with a period of 2.3 days. Together with the already identified binary IRS 16SW, there are now three confirmed OB/WR binaries in the inner 0.2 pc of the Galactic center. Using radial velocity change upper limits, we were able to constrain the spectroscopic binary fraction in the Galactic center to F sub(SB) = 0.30 super(+0.34) sub(-0.21) at a confidence level of 95%, a massive binary fraction close to that observed in dense clusters. The fraction of eclipsing binaries with photometric amplitudes Delta m > 0.4 is F super(GC) sub(EB) = 3% + or - 2%, which is consistent with local OB star clusters (F sub(EB) = 1%). Overall, the Galactic center binary fraction seems to be similar to the binary fraction in comparable young clusters. |
doi_str_mv | 10.1088/0004-637X/782/2/101 |
format | Article |
fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_22351411</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1718921077</sourcerecordid><originalsourceid>FETCH-LOGICAL-c422t-d4f59067ba74a03d5fce6974c5d6e7e863a72c3e5b01d4fd401a78e179709b4c3</originalsourceid><addsrcrecordid>eNqN0VFLwzAQB_AgCs7pJ_Cl4It7qM0laZM81tG5wtzAzqFPIUtTV9nW2XSC396Wyp59Ou74cRz3R-gW8ANgIQKMMfMjyt8CLkhAAsBwhgYQUuEzGvJzNDiJS3Tl3GfXEikHaPQcZ1m6SrzHdB6_pEnmpXNvOU28VTpO5-ny3VtMvOyj9uJrdFHorbM3f3WIXifJcjz1Z4undBzPfMMIafycFaHEEV9rzjSmeVgYG0nOTJhHllsRUc2JoTZcY2htzjBoLixwybFcM0OH6K7fW7mmVM6UjTUbU-331jSKEBoCA2jVqFcbvVWHutzp-kdVulTTeKa6GQYpicTsu7P3vT3U1dfRukbtSmfsdqv3tjo6BRyEJIA5_wfFwCQRUUdpT01dOVfb4nQGYNWloronq-7nqk1FkXYI9Bd7P3fp</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1701492867</pqid></control><display><type>article</type><title>MASSIVE BINARIES IN THE VICINITY OF Sgr A</title><source>EZB-FREE-00999 freely available EZB journals</source><source>Institute of Physics Open Access Journal Titles</source><source>Alma/SFX Local Collection</source><creator>Pfuhl, O ; Alexander, T ; Gillessen, S ; Martins, F ; Genzel, R ; Eisenhauer, F ; Fritz, T K ; Ott, T</creator><creatorcontrib>Pfuhl, O ; Alexander, T ; Gillessen, S ; Martins, F ; Genzel, R ; Eisenhauer, F ; Fritz, T K ; Ott, T</creatorcontrib><description>A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the supermassive black hole Sgr A* revealed two new binaries: a long-period Ofpe/WN9 binary, IRS 16NE, with a modest eccentricity of 0.3 and a period of 224 days, and an eclipsing Wolf-Rayet binary with a period of 2.3 days. Together with the already identified binary IRS 16SW, there are now three confirmed OB/WR binaries in the inner 0.2 pc of the Galactic center. Using radial velocity change upper limits, we were able to constrain the spectroscopic binary fraction in the Galactic center to F sub(SB) = 0.30 super(+0.34) sub(-0.21) at a confidence level of 95%, a massive binary fraction close to that observed in dense clusters. The fraction of eclipsing binaries with photometric amplitudes Delta m > 0.4 is F super(GC) sub(EB) = 3% + or - 2%, which is consistent with local OB star clusters (F sub(EB) = 1%). Overall, the Galactic center binary fraction seems to be similar to the binary fraction in comparable young clusters.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/782/2/101</identifier><language>eng</language><publisher>United States: American Astronomical Society</publisher><subject>AMPLITUDES ; Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; BINARY STARS ; BLACK HOLES ; Clusters ; COMPARATIVE EVALUATIONS ; Confidence intervals ; Eccentricity ; ECLIPSE ; GALAXIES ; GALAXY NUCLEI ; Massive stars ; PHOTOMETRY ; RADIAL VELOCITY ; Sciences of the Universe ; Solar and Stellar Astrophysics ; SPECTROSCOPY ; STAR CLUSTERS ; STARS ; WOLF-RAYET STARS</subject><ispartof>The Astrophysical journal, 2014-02, Vol.782 (2), p.1-10</ispartof><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c422t-d4f59067ba74a03d5fce6974c5d6e7e863a72c3e5b01d4fd401a78e179709b4c3</citedby><cites>FETCH-LOGICAL-c422t-d4f59067ba74a03d5fce6974c5d6e7e863a72c3e5b01d4fd401a78e179709b4c3</cites><orcidid>0000-0002-5708-0481 ; 0000-0003-1572-0396 ; 0000-0002-2767-9653 ; 0000-0001-5496-4567</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://hal.science/hal-01992904$$DView record in HAL$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22351411$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Pfuhl, O</creatorcontrib><creatorcontrib>Alexander, T</creatorcontrib><creatorcontrib>Gillessen, S</creatorcontrib><creatorcontrib>Martins, F</creatorcontrib><creatorcontrib>Genzel, R</creatorcontrib><creatorcontrib>Eisenhauer, F</creatorcontrib><creatorcontrib>Fritz, T K</creatorcontrib><creatorcontrib>Ott, T</creatorcontrib><title>MASSIVE BINARIES IN THE VICINITY OF Sgr A</title><title>The Astrophysical journal</title><description>A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the supermassive black hole Sgr A* revealed two new binaries: a long-period Ofpe/WN9 binary, IRS 16NE, with a modest eccentricity of 0.3 and a period of 224 days, and an eclipsing Wolf-Rayet binary with a period of 2.3 days. Together with the already identified binary IRS 16SW, there are now three confirmed OB/WR binaries in the inner 0.2 pc of the Galactic center. Using radial velocity change upper limits, we were able to constrain the spectroscopic binary fraction in the Galactic center to F sub(SB) = 0.30 super(+0.34) sub(-0.21) at a confidence level of 95%, a massive binary fraction close to that observed in dense clusters. The fraction of eclipsing binaries with photometric amplitudes Delta m > 0.4 is F super(GC) sub(EB) = 3% + or - 2%, which is consistent with local OB star clusters (F sub(EB) = 1%). Overall, the Galactic center binary fraction seems to be similar to the binary fraction in comparable young clusters.</description><subject>AMPLITUDES</subject><subject>Astrophysics</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>BINARY STARS</subject><subject>BLACK HOLES</subject><subject>Clusters</subject><subject>COMPARATIVE EVALUATIONS</subject><subject>Confidence intervals</subject><subject>Eccentricity</subject><subject>ECLIPSE</subject><subject>GALAXIES</subject><subject>GALAXY NUCLEI</subject><subject>Massive stars</subject><subject>PHOTOMETRY</subject><subject>RADIAL VELOCITY</subject><subject>Sciences of the Universe</subject><subject>Solar and Stellar Astrophysics</subject><subject>SPECTROSCOPY</subject><subject>STAR CLUSTERS</subject><subject>STARS</subject><subject>WOLF-RAYET STARS</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqN0VFLwzAQB_AgCs7pJ_Cl4It7qM0laZM81tG5wtzAzqFPIUtTV9nW2XSC396Wyp59Ou74cRz3R-gW8ANgIQKMMfMjyt8CLkhAAsBwhgYQUuEzGvJzNDiJS3Tl3GfXEikHaPQcZ1m6SrzHdB6_pEnmpXNvOU28VTpO5-ny3VtMvOyj9uJrdFHorbM3f3WIXifJcjz1Z4undBzPfMMIafycFaHEEV9rzjSmeVgYG0nOTJhHllsRUc2JoTZcY2htzjBoLixwybFcM0OH6K7fW7mmVM6UjTUbU-331jSKEBoCA2jVqFcbvVWHutzp-kdVulTTeKa6GQYpicTsu7P3vT3U1dfRukbtSmfsdqv3tjo6BRyEJIA5_wfFwCQRUUdpT01dOVfb4nQGYNWloronq-7nqk1FkXYI9Bd7P3fp</recordid><startdate>20140220</startdate><enddate>20140220</enddate><creator>Pfuhl, O</creator><creator>Alexander, T</creator><creator>Gillessen, S</creator><creator>Martins, F</creator><creator>Genzel, R</creator><creator>Eisenhauer, F</creator><creator>Fritz, T K</creator><creator>Ott, T</creator><general>American Astronomical Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>1XC</scope><scope>VOOES</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-5708-0481</orcidid><orcidid>https://orcid.org/0000-0003-1572-0396</orcidid><orcidid>https://orcid.org/0000-0002-2767-9653</orcidid><orcidid>https://orcid.org/0000-0001-5496-4567</orcidid></search><sort><creationdate>20140220</creationdate><title>MASSIVE BINARIES IN THE VICINITY OF Sgr A</title><author>Pfuhl, O ; Alexander, T ; Gillessen, S ; Martins, F ; Genzel, R ; Eisenhauer, F ; Fritz, T K ; Ott, T</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c422t-d4f59067ba74a03d5fce6974c5d6e7e863a72c3e5b01d4fd401a78e179709b4c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>AMPLITUDES</topic><topic>Astrophysics</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>BINARY STARS</topic><topic>BLACK HOLES</topic><topic>Clusters</topic><topic>COMPARATIVE EVALUATIONS</topic><topic>Confidence intervals</topic><topic>Eccentricity</topic><topic>ECLIPSE</topic><topic>GALAXIES</topic><topic>GALAXY NUCLEI</topic><topic>Massive stars</topic><topic>PHOTOMETRY</topic><topic>RADIAL VELOCITY</topic><topic>Sciences of the Universe</topic><topic>Solar and Stellar Astrophysics</topic><topic>SPECTROSCOPY</topic><topic>STAR CLUSTERS</topic><topic>STARS</topic><topic>WOLF-RAYET STARS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Pfuhl, O</creatorcontrib><creatorcontrib>Alexander, T</creatorcontrib><creatorcontrib>Gillessen, S</creatorcontrib><creatorcontrib>Martins, F</creatorcontrib><creatorcontrib>Genzel, R</creatorcontrib><creatorcontrib>Eisenhauer, F</creatorcontrib><creatorcontrib>Fritz, T K</creatorcontrib><creatorcontrib>Ott, T</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Pfuhl, O</au><au>Alexander, T</au><au>Gillessen, S</au><au>Martins, F</au><au>Genzel, R</au><au>Eisenhauer, F</au><au>Fritz, T K</au><au>Ott, T</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>MASSIVE BINARIES IN THE VICINITY OF Sgr A</atitle><jtitle>The Astrophysical journal</jtitle><date>2014-02-20</date><risdate>2014</risdate><volume>782</volume><issue>2</issue><spage>1</spage><epage>10</epage><pages>1-10</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the supermassive black hole Sgr A* revealed two new binaries: a long-period Ofpe/WN9 binary, IRS 16NE, with a modest eccentricity of 0.3 and a period of 224 days, and an eclipsing Wolf-Rayet binary with a period of 2.3 days. Together with the already identified binary IRS 16SW, there are now three confirmed OB/WR binaries in the inner 0.2 pc of the Galactic center. Using radial velocity change upper limits, we were able to constrain the spectroscopic binary fraction in the Galactic center to F sub(SB) = 0.30 super(+0.34) sub(-0.21) at a confidence level of 95%, a massive binary fraction close to that observed in dense clusters. The fraction of eclipsing binaries with photometric amplitudes Delta m > 0.4 is F super(GC) sub(EB) = 3% + or - 2%, which is consistent with local OB star clusters (F sub(EB) = 1%). Overall, the Galactic center binary fraction seems to be similar to the binary fraction in comparable young clusters.</abstract><cop>United States</cop><pub>American Astronomical Society</pub><doi>10.1088/0004-637X/782/2/101</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-5708-0481</orcidid><orcidid>https://orcid.org/0000-0003-1572-0396</orcidid><orcidid>https://orcid.org/0000-0002-2767-9653</orcidid><orcidid>https://orcid.org/0000-0001-5496-4567</orcidid><oa>free_for_read</oa></addata></record> |
fulltext | fulltext |
identifier | ISSN: 0004-637X |
ispartof | The Astrophysical journal, 2014-02, Vol.782 (2), p.1-10 |
issn | 0004-637X 1538-4357 |
language | eng |
recordid | cdi_osti_scitechconnect_22351411 |
source | EZB-FREE-00999 freely available EZB journals; Institute of Physics Open Access Journal Titles; Alma/SFX Local Collection |
subjects | AMPLITUDES Astrophysics ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BINARY STARS BLACK HOLES Clusters COMPARATIVE EVALUATIONS Confidence intervals Eccentricity ECLIPSE GALAXIES GALAXY NUCLEI Massive stars PHOTOMETRY RADIAL VELOCITY Sciences of the Universe Solar and Stellar Astrophysics SPECTROSCOPY STAR CLUSTERS STARS WOLF-RAYET STARS |
title | MASSIVE BINARIES IN THE VICINITY OF Sgr A |
url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-24T23%3A39%3A09IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=MASSIVE%20BINARIES%20IN%20THE%20VICINITY%20OF%20Sgr%20A&rft.jtitle=The%20Astrophysical%20journal&rft.au=Pfuhl,%20O&rft.date=2014-02-20&rft.volume=782&rft.issue=2&rft.spage=1&rft.epage=10&rft.pages=1-10&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.1088/0004-637X/782/2/101&rft_dat=%3Cproquest_osti_%3E1718921077%3C/proquest_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1701492867&rft_id=info:pmid/&rfr_iscdi=true |