Перейти к основному содержанию
AkademIndex

Продукты

Для разработчиков

AkademBaseОткрытый API экосистемы
Статья

MAGAZ3NE: Massive, Extremely Dusty Galaxies at z ∼ 2 Lead to Photometric Overestimation of Number Densities of the Most Massive Galaxies at 3 < z < 4*

Ben ForrestDepartment of Physics and Astronomy, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; [email protected]Michael C. CooperDepartment of Physics and Astronomy, University of California , Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697, USAAdam MuzzinDepartment of Physics and Astronomy, York University, 4700 Keele Street, Toronto, ON MJ3 1P3, CanadaGillian WilsonDepartment of Physics, University of California, Merced, 5200 North Lake Road, Merced, CA 95343, USADanilo MarchesiniDepartment of Physics and Astronomy, Tufts University, 574 Boston Avenue, Medford, MA 02155, USAIan McConachieDepartment of Physics and Astronomy, University of California , Riverside, 900 University Avenue, Riverside, CA 92521, USAPercy GómezW.M. Keck Observatory, 65-1120 Mamalahoa Hwy., Kamuela, HI 96743, USAMarianna AnnunziatellaCentro de Astrobiología (CSIC-INTA), Ctra de Torrejón a Ajalvir, km 4, E-28850 Torrejón de Ardoz, Madrid, SpainZ. Cemile MarsanDepartment of Physics and Astronomy, York University, 4700 Keele Street, Toronto, ON MJ3 1P3, CanadaJoey BraspenningLeiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The NetherlandsWenjun ChangDepartment of Physics and Astronomy, University of California , Riverside, 900 University Avenue, Riverside, CA 92521, USAG. De LuciaIFPU—Institute for Fundamental Physics of the Universe, Via Beirut 2, 34151 Trieste, ItalyFabio FontanotIFPU—Institute for Fundamental Physics of the Universe, Via Beirut 2, 34151 Trieste, ItalyMichaela HirschmannINAF—Astronomical Observatory of Trieste, Via G.B. Tiepolo 11, Trieste, ItalyDylan NelsonUniversität Heidelberg, Institut für Theoretische Astrophysik, ZAH, Albert-Ueberle-Str. 2, 69120 Heidelberg, GermanyAnnalisa PillepichMax-Planck-Institut für Astronomie, Königstuhl 17, 69117 Heidelberg, GermanyJoop SchayeLeiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The NetherlandsStephanie M. Urbano StawinskiDepartment of Physics and Astronomy, University of California , Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697, USAMauro StefanonDepartament d’Astronomia i Astrofìsica, Universitat de València, C. Dr. Moliner 50, E-46100 Burjassot, València, SpainLizhi XieTianjin Normal University, Binshuixidao 393, Xiqing 300387, Tianjin, People's Republic of China
2024en
ABI

Аннотация

Abstract We present rest-frame optical spectra from Keck/MOSFIRE and Keck/NIRES of 16 candidate ultramassive galaxies targeted as part of the Massive Ancient Galaxies at z &gt; 3 Near-Infrared Survey (MAGAZ3NE). These candidates were selected to have photometric redshifts 3 ≲ z phot &lt;4, photometric stellar masses <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mrow> <mml:mi mathvariant="normal">log</mml:mi> </mml:mrow> <mml:mo stretchy="false">(</mml:mo> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>∗</mml:mo> </mml:mrow> </mml:msub> <mml:mrow> <mml:mo>/</mml:mo> </mml:mrow> <mml:msub> <mml:mrow> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow> <mml:mo>⊙</mml:mo> </mml:mrow> </mml:msub> <mml:mo stretchy="false">)</mml:mo> </mml:math> &gt; 11.7, and well-sampled photometric spectral energy distributions (SEDs) from the UltraVISTA and VIDEO surveys. In contrast to previous spectroscopic observations of blue star-forming and poststarburst ultramassive galaxies, candidates in this sample have very red SEDs implying significant dust attenuation, old stellar ages, and/or active galactic nuclei (AGN). Of these galaxies, eight are revealed to be heavily dust-obscured 2.0 &lt; z &lt; 2.7 galaxies with strong emission lines, some showing broad features indicative of AGN, three are Type I AGN hosts at z &gt; 3, one is a z ∼ 1.2 dusty galaxy, and four galaxies do not have a confirmed spectroscopic redshift. In fact, none of the sample has ∣ z spec − z phot ∣ &lt; 0.5, suggesting difficulties for photometric redshift programs in fitting similarly red SEDs. The prevalence of these red interloper galaxies suggests that the number densities of high-mass galaxies are overestimated at z ≳ 3 in large photometric surveys, helping to resolve the “impossibly early galaxy problem” and leading to much better agreement with cosmological galaxy simulations. A more complete spectroscopic survey of ultramassive galaxies is required to pin down the uncertainties on their number densities in the early Universe.

Перевод пока недоступен

Идентификаторы

DOI
10.3847/1538-4357/ad8b1c

Цитирования и источники

Цитирований: 1Использованных источников: 0
Показатели — AkademScholar