MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters
We examine the quiescent fractions of massive galaxies in six z ≳ 3 spectroscopically confirmed protoclusters in the COSMOS field, one of which is newly confirmed and presented here. We report the spectroscopic confirmation of MAGAZ3NE J100143+023021 at $z={3.122}_{-0.004}^{+0.007}$ by the Massive A...
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2024-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/ad8f36 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850131302341148672 |
|---|---|
| author | Ian McConachie Gillian Wilson Ben Forrest Z. Cemile Marsan Adam Muzzin M. C. Cooper Marianna Annunziatella Danilo Marchesini Percy Gomez Wenjun Chang Stephanie M. Urbano Stawinski Michael McDonald Tracy Webb Allison Noble Brian C. Lemaux Ekta A. Shah Priti Staab Lori M. Lubin Roy R. Gal |
| author_facet | Ian McConachie Gillian Wilson Ben Forrest Z. Cemile Marsan Adam Muzzin M. C. Cooper Marianna Annunziatella Danilo Marchesini Percy Gomez Wenjun Chang Stephanie M. Urbano Stawinski Michael McDonald Tracy Webb Allison Noble Brian C. Lemaux Ekta A. Shah Priti Staab Lori M. Lubin Roy R. Gal |
| author_sort | Ian McConachie |
| collection | DOAJ |
| description | We examine the quiescent fractions of massive galaxies in six z ≳ 3 spectroscopically confirmed protoclusters in the COSMOS field, one of which is newly confirmed and presented here. We report the spectroscopic confirmation of MAGAZ3NE J100143+023021 at $z={3.122}_{-0.004}^{+0.007}$ by the Massive Ancient Galaxies At z > 3 NEar-infrared (MAGAZ3NE) survey. MAGAZ3NE J100143+023021 contains a total of 79 protocluster members (28 spectroscopic and 51 photometric). Three spectroscopically confirmed members are star-forming ultramassive galaxies (UMGs; $\mathrm{log}({M}_{\star }/{M}_{\odot })$ > 11), the most massive of which has $\mathrm{log}({M}_{\star }/{M}_{\odot })$ $\,=\,{11.15}_{-0.06}^{+0.05}$ . Combining Keck/MOSFIRE spectroscopy and the COSMOS2020 photometric catalog, we use a weighted Gaussian kernel density estimator to map the protocluster and measure its total mass ${2.25}_{-0.65}^{+1.55}\times {10}^{14}\,{M}_{\odot }$ in the dense “core” region. For each of the six COSMOS protoclusters, we compare the quiescent fraction to the status of the central UMG as star-forming or quiescent. We observe that galaxies in these protoclusters appear to obey galactic conformity: Elevated quiescent fractions are found in protoclusters with UVJ -quiescent UMGs and low quiescent fractions are found in protoclusters containing UVJ star-frming UMGs. This correlation of star formation/quiescence in UMGs and the massive galaxies nearby in these protoclusters is the first evidence for the existence of galactic conformity at z > 3. Despite disagreements over mechanisms behind conformity at low redshifts, its presence at these early cosmic times would provide strong constraints on the physics proposed to drive galactic conformity. |
| format | Article |
| id | doaj-art-3862f81d30454ef58c18f8757f8ab1e2 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-3862f81d30454ef58c18f8757f8ab1e22025-08-20T02:32:27ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0197811710.3847/1538-4357/ad8f36MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 ProtoclustersIan McConachie0https://orcid.org/0000-0002-2446-8770Gillian Wilson1https://orcid.org/0000-0002-6572-7089Ben Forrest2https://orcid.org/0000-0001-6003-0541Z. Cemile Marsan3https://orcid.org/0000-0002-7248-1566Adam Muzzin4https://orcid.org/0000-0002-9330-9108M. C. Cooper5https://orcid.org/0000-0003-1371-6019Marianna Annunziatella6https://orcid.org/0000-0002-8053-8040Danilo Marchesini7https://orcid.org/0000-0001-9002-3502Percy Gomez8https://orcid.org/0000-0003-0408-9850Wenjun Chang9https://orcid.org/0000-0003-2144-2943Stephanie M. Urbano Stawinski10https://orcid.org/0000-0001-8169-7249Michael McDonald11Tracy Webb12Allison Noble13Brian C. Lemaux14https://orcid.org/0000-0002-1428-7036Ekta A. Shah15https://orcid.org/0000-0001-7811-9042Priti Staab16https://orcid.org/0000-0002-8877-4320Lori M. Lubin17https://orcid.org/0000-0003-2119-8151Roy R. Gal18https://orcid.org/0000-0001-8255-6560Department of Astronomy, University of Wisconsin–Madison , 475 N. Charter St., Madison, WI 53706 USA, USA ; ian.mcconachie@wisc.edu; Department of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USADepartment of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USA; Department of Physics, University of California, Merced , 5200 North Lake Road, Merced, CA 92543, USADepartment of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USA; Department of Physics and Astronomy, University of California, Davis , One Shields Avenue, Davis, CA 95616, USADepartment of Physics and Astronomy, York University , 4700, Keele Street, Toronto, ON MJ3 1P3, CanadaDepartment of Physics and Astronomy, York University , 4700, Keele Street, Toronto, ON MJ3 1P3, CanadaDepartment of Physics and Astronomy, University of California, Irvine , 4129 Reines Hall, Irvine, CA, USACentro de Astrobiología (CSIC-INTA) , Ctra de Torrejón a Ajalvir, km 4, E-28850 Torrejón de Ardoz, Madrid, SpainDepartment of Physics & Astronomy, Tufts University , MA 02155, USAW.M. Keck Observatory , 65-1120 Mamalahoa Hwy., Kamuela, HI 96743, USADepartment of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USADepartment of Physics and Astronomy, University of California, Irvine , 4129 Reines Hall, Irvine, CA, USADepartment of Physics and Astronomy, University of California, Riverside , 900 University Avenue, Riverside, CA 92521, USADepartment of Physics, McGill Space Institute, McGill University , 3600 rue University, Montréal, QC H3A 2T8, CanadaSchool of Earth and Space Exploration, Arizona State University , Tempe, AZ 85287, USA; Beus Center for Cosmic Foundations, Arizona State University , Tempe, AZ 85287, USADepartment of Physics and Astronomy, University of California, Davis , One Shields Avenue, Davis, CA 95616, USA; Gemini Observatory , NSF's NOIRLab, 670 N. A’ohoku Place, Hilo, HI 96720, USADepartment of Physics and Astronomy, University of California, Davis , One Shields Avenue, Davis, CA 95616, USADepartment of Physics and Astronomy, University of California, Davis , One Shields Avenue, Davis, CA 95616, USADepartment of Physics and Astronomy, University of California, Davis , One Shields Avenue, Davis, CA 95616, USAInstitute for Astronomy, University of Hawai’i , 2680 Woodlawn Drive, Honolulu, HI 96822, USAWe examine the quiescent fractions of massive galaxies in six z ≳ 3 spectroscopically confirmed protoclusters in the COSMOS field, one of which is newly confirmed and presented here. We report the spectroscopic confirmation of MAGAZ3NE J100143+023021 at $z={3.122}_{-0.004}^{+0.007}$ by the Massive Ancient Galaxies At z > 3 NEar-infrared (MAGAZ3NE) survey. MAGAZ3NE J100143+023021 contains a total of 79 protocluster members (28 spectroscopic and 51 photometric). Three spectroscopically confirmed members are star-forming ultramassive galaxies (UMGs; $\mathrm{log}({M}_{\star }/{M}_{\odot })$ > 11), the most massive of which has $\mathrm{log}({M}_{\star }/{M}_{\odot })$ $\,=\,{11.15}_{-0.06}^{+0.05}$ . Combining Keck/MOSFIRE spectroscopy and the COSMOS2020 photometric catalog, we use a weighted Gaussian kernel density estimator to map the protocluster and measure its total mass ${2.25}_{-0.65}^{+1.55}\times {10}^{14}\,{M}_{\odot }$ in the dense “core” region. For each of the six COSMOS protoclusters, we compare the quiescent fraction to the status of the central UMG as star-forming or quiescent. We observe that galaxies in these protoclusters appear to obey galactic conformity: Elevated quiescent fractions are found in protoclusters with UVJ -quiescent UMGs and low quiescent fractions are found in protoclusters containing UVJ star-frming UMGs. This correlation of star formation/quiescence in UMGs and the massive galaxies nearby in these protoclusters is the first evidence for the existence of galactic conformity at z > 3. Despite disagreements over mechanisms behind conformity at low redshifts, its presence at these early cosmic times would provide strong constraints on the physics proposed to drive galactic conformity.https://doi.org/10.3847/1538-4357/ad8f36Galaxy evolutionGalaxy environmentsHigh-redshift galaxiesHigh-redshift galaxy clusters |
| spellingShingle | Ian McConachie Gillian Wilson Ben Forrest Z. Cemile Marsan Adam Muzzin M. C. Cooper Marianna Annunziatella Danilo Marchesini Percy Gomez Wenjun Chang Stephanie M. Urbano Stawinski Michael McDonald Tracy Webb Allison Noble Brian C. Lemaux Ekta A. Shah Priti Staab Lori M. Lubin Roy R. Gal MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters The Astrophysical Journal Galaxy evolution Galaxy environments High-redshift galaxies High-redshift galaxy clusters |
| title | MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters |
| title_full | MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters |
| title_fullStr | MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters |
| title_full_unstemmed | MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters |
| title_short | MAGAZ3NE: Evidence for Galactic Conformity in z ≳ 3 Protoclusters |
| title_sort | magaz3ne evidence for galactic conformity in z ≳ 3 protoclusters |
| topic | Galaxy evolution Galaxy environments High-redshift galaxies High-redshift galaxy clusters |
| url | https://doi.org/10.3847/1538-4357/ad8f36 |
| work_keys_str_mv | AT ianmcconachie magaz3neevidenceforgalacticconformityinz3protoclusters AT gillianwilson magaz3neevidenceforgalacticconformityinz3protoclusters AT benforrest magaz3neevidenceforgalacticconformityinz3protoclusters AT zcemilemarsan magaz3neevidenceforgalacticconformityinz3protoclusters AT adammuzzin magaz3neevidenceforgalacticconformityinz3protoclusters AT mccooper magaz3neevidenceforgalacticconformityinz3protoclusters AT mariannaannunziatella magaz3neevidenceforgalacticconformityinz3protoclusters AT danilomarchesini magaz3neevidenceforgalacticconformityinz3protoclusters AT percygomez magaz3neevidenceforgalacticconformityinz3protoclusters AT wenjunchang magaz3neevidenceforgalacticconformityinz3protoclusters AT stephaniemurbanostawinski magaz3neevidenceforgalacticconformityinz3protoclusters AT michaelmcdonald magaz3neevidenceforgalacticconformityinz3protoclusters AT tracywebb magaz3neevidenceforgalacticconformityinz3protoclusters AT allisonnoble magaz3neevidenceforgalacticconformityinz3protoclusters AT brianclemaux magaz3neevidenceforgalacticconformityinz3protoclusters AT ektaashah magaz3neevidenceforgalacticconformityinz3protoclusters AT pritistaab magaz3neevidenceforgalacticconformityinz3protoclusters AT lorimlubin magaz3neevidenceforgalacticconformityinz3protoclusters AT royrgal magaz3neevidenceforgalacticconformityinz3protoclusters |