تقرير
MAGAZ3NE: Massive, Extremely Dusty Galaxies at $z\sim2$ Lead to Photometric Overestimation of Number Densities of the Most Massive Galaxies at $3
التفاصيل البيبلوغرافية
العنوان:
MAGAZ3NE: Massive, Extremely Dusty Galaxies at $z\sim2$ Lead to Photometric Overestimation of Number Densities of the Most Massive Galaxies at $3
المؤلفون:
Forrest, Ben, Cooper, M. C., Muzzin, Adam, Wilson, Gillian, Marchesini, Danilo, McConachie, Ian, Gomez, Percy, Annunziatella, Marianna, Marsan, Z. Cemile, Braspenning, Joey, Chang, Wenjun, de Lucia, Gabriella, Fontanot, Fabio, Hirschmann, Michaela, Nelson, Dylan, Pillepich, Annalisa, Schaye, Joop, Stawinski, Stephanie M. Urbano, Stefanon, Mauro, Xie, Lizhi
سنة النشر:
2024
المجموعة:
Astrophysics
مصطلحات موضوعية:
Astrophysics - Astrophysics of Galaxies
الوصف:
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 $z>3$ Near-Infrared (MAGAZ3NE) Survey. These candidates were selected to have photometric redshifts $3\lesssim z_{\rm phot}<4$, photometric stellar masses log($M$/M$_\odot$)$>11.7$, 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 post-starburst 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 $2.03$, one is a $z\sim1.2$ dusty galaxy, and four galaxies do not have a confirmed spectroscopic redshift. In fact, none of the sample has |$z_{\rm spec}-z_{\rm phot}$|$<0.5$, 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 $z\gtrsim3$ 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.
Comment: Submitted to ApJ. Comments welcome!
نوع الوثيقة:
Working Paper
الوصول الحر:
http://arxiv.org/abs/2404.19018Test
رقم الانضمام:
edsarx.2404.19018
قاعدة البيانات:
arXiv
| العنوان: | MAGAZ3NE: Massive, Extremely Dusty Galaxies at $z\sim2$ Lead to Photometric Overestimation of Number Densities of the Most Massive Galaxies at $3 |
|---|---|
| المؤلفون: | Forrest, Ben, Cooper, M. C., Muzzin, Adam, Wilson, Gillian, Marchesini, Danilo, McConachie, Ian, Gomez, Percy, Annunziatella, Marianna, Marsan, Z. Cemile, Braspenning, Joey, Chang, Wenjun, de Lucia, Gabriella, Fontanot, Fabio, Hirschmann, Michaela, Nelson, Dylan, Pillepich, Annalisa, Schaye, Joop, Stawinski, Stephanie M. Urbano, Stefanon, Mauro, Xie, Lizhi |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | 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 $z>3$ Near-Infrared (MAGAZ3NE) Survey. These candidates were selected to have photometric redshifts $3\lesssim z_{\rm phot}<4$, photometric stellar masses log($M$/M$_\odot$)$>11.7$, 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 post-starburst 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 Comment: Submitted to ApJ. Comments welcome! |
| نوع الوثيقة: | Working Paper |
| الوصول الحر: | http://arxiv.org/abs/2404.19018Test |
| رقم الانضمام: | edsarx.2404.19018 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |