An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey

3D-HST Team

doi:10.1017/S1743921319009025

An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey

3D-HST Team

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Galaxies are complicated physical systems which obey complex scaling relationships; as a result, properties measured from broadband photometry are often highly correlated, degenerate, or both. Therefore, the accuracy of basic properties like stellar masses and star formation rates (SFRs) depend on the accuracy of many second-order galaxy properties, including star formation histories (SFHs), stellar metallicities, dust properties, and many others. Here, we reassess measurements of galaxy stellar masses and SFRs using a 14-parameter physical model built in the Prospector Bayesian inference framework. We find that galaxies are ∼0.2 dex more massive and have ∼0.2 dex lower star formation rates than classic measurements. These measurements lower the observed cosmic star formation rate density and increase the observed buildup of stellar mass, finally bringing these two metrics into agreement at the factor-of-two level at 0.5 < z < 2.5.

Original language	English (US)
Title of host publication	Proceedings of the International Astronomical Union
Editors	Elisabete da Cunha, Elisabete da Cunha, Jacqueline Hodge, Jose Afonso, Laura Pentericci, David Sobral
Publisher	Cambridge University Press
Pages	99-102
Number of pages	4
Edition	352
ISBN (Electronic)	9781108492133
DOIs	https://doi.org/10.1017/S1743921319009025
State	Published - 2020
Event	352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era - Viana do Castelo, Portugal Duration: Jun 3 2019 → Jun 7 2019

Publication series

Name	Proceedings of the International Astronomical Union
Number	352
Volume	15
ISSN (Print)	1743-9213
ISSN (Electronic)	1743-9221

Conference

Conference	352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era
Country/Territory	Portugal
City	Viana do Castelo
Period	6/3/19 → 6/7/19

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1017/S1743921319009025

Cite this

3D-HST Team (2020). An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey. In E. da Cunha, E. da Cunha, J. Hodge, J. Afonso, L. Pentericci, & D. Sobral (Eds.), Proceedings of the International Astronomical Union (352 ed., pp. 99-102). (Proceedings of the International Astronomical Union; Vol. 15, No. 352). Cambridge University Press. https://doi.org/10.1017/S1743921319009025

3D-HST Team. / An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey. Proceedings of the International Astronomical Union. editor / Elisabete da Cunha ; Elisabete da Cunha ; Jacqueline Hodge ; Jose Afonso ; Laura Pentericci ; David Sobral. 352. ed. Cambridge University Press, 2020. pp. 99-102 (Proceedings of the International Astronomical Union; 352).

@inproceedings{1d223fa372c74a228372804979e33e4e,

title = "An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey",

abstract = "Galaxies are complicated physical systems which obey complex scaling relationships; as a result, properties measured from broadband photometry are often highly correlated, degenerate, or both. Therefore, the accuracy of basic properties like stellar masses and star formation rates (SFRs) depend on the accuracy of many second-order galaxy properties, including star formation histories (SFHs), stellar metallicities, dust properties, and many others. Here, we reassess measurements of galaxy stellar masses and SFRs using a 14-parameter physical model built in the Prospector Bayesian inference framework. We find that galaxies are ∼0.2 dex more massive and have ∼0.2 dex lower star formation rates than classic measurements. These measurements lower the observed cosmic star formation rate density and increase the observed buildup of stellar mass, finally bringing these two metrics into agreement at the factor-of-two level at 0.5 < z < 2.5.",

author = "\{3D-HST Team\} and Joel Leja and Johnson, \{Benjamin D.\} and Charlie Conroy and \{van Dokkum\}, Pieter and Speagle, \{Joshua S.\}",

note = "Publisher Copyright: {\textcopyright} International Astronomical Union 2020.; 352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era ; Conference date: 03-06-2019 Through 07-06-2019",

year = "2020",

doi = "10.1017/S1743921319009025",

language = "English (US)",

series = "Proceedings of the International Astronomical Union",

publisher = "Cambridge University Press",

number = "352",

pages = "99--102",

editor = "\{da Cunha\}, Elisabete and \{da Cunha\}, Elisabete and Jacqueline Hodge and Jose Afonso and Laura Pentericci and David Sobral",

booktitle = "Proceedings of the International Astronomical Union",

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edition = "352",

}

3D-HST Team 2020, An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey. in E da Cunha, E da Cunha, J Hodge, J Afonso, L Pentericci & D Sobral (eds), Proceedings of the International Astronomical Union. 352 edn, Proceedings of the International Astronomical Union, no. 352, vol. 15, Cambridge University Press, pp. 99-102, 352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era, Viana do Castelo, Portugal, 6/3/19. https://doi.org/10.1017/S1743921319009025

An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey. / 3D-HST Team.
Proceedings of the International Astronomical Union. ed. / Elisabete da Cunha; Elisabete da Cunha; Jacqueline Hodge; Jose Afonso; Laura Pentericci; David Sobral. 352. ed. Cambridge University Press, 2020. p. 99-102 (Proceedings of the International Astronomical Union; Vol. 15, No. 352).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey

AU - 3D-HST Team

AU - Leja, Joel

AU - Johnson, Benjamin D.

AU - Conroy, Charlie

AU - van Dokkum, Pieter

AU - Speagle, Joshua S.

N1 - Publisher Copyright: © International Astronomical Union 2020.

PY - 2020

Y1 - 2020

N2 - Galaxies are complicated physical systems which obey complex scaling relationships; as a result, properties measured from broadband photometry are often highly correlated, degenerate, or both. Therefore, the accuracy of basic properties like stellar masses and star formation rates (SFRs) depend on the accuracy of many second-order galaxy properties, including star formation histories (SFHs), stellar metallicities, dust properties, and many others. Here, we reassess measurements of galaxy stellar masses and SFRs using a 14-parameter physical model built in the Prospector Bayesian inference framework. We find that galaxies are ∼0.2 dex more massive and have ∼0.2 dex lower star formation rates than classic measurements. These measurements lower the observed cosmic star formation rate density and increase the observed buildup of stellar mass, finally bringing these two metrics into agreement at the factor-of-two level at 0.5 < z < 2.5.

AB - Galaxies are complicated physical systems which obey complex scaling relationships; as a result, properties measured from broadband photometry are often highly correlated, degenerate, or both. Therefore, the accuracy of basic properties like stellar masses and star formation rates (SFRs) depend on the accuracy of many second-order galaxy properties, including star formation histories (SFHs), stellar metallicities, dust properties, and many others. Here, we reassess measurements of galaxy stellar masses and SFRs using a 14-parameter physical model built in the Prospector Bayesian inference framework. We find that galaxies are ∼0.2 dex more massive and have ∼0.2 dex lower star formation rates than classic measurements. These measurements lower the observed cosmic star formation rate density and increase the observed buildup of stellar mass, finally bringing these two metrics into agreement at the factor-of-two level at 0.5 < z < 2.5.

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M3 - Conference contribution

AN - SCOPUS:85088240003

T3 - Proceedings of the International Astronomical Union

SP - 99

EP - 102

BT - Proceedings of the International Astronomical Union

A2 - da Cunha, Elisabete

A2 - Hodge, Jacqueline

A2 - Afonso, Jose

A2 - Pentericci, Laura

A2 - Sobral, David

PB - Cambridge University Press

T2 - 352nd Symposium of the International Astronomical Union on Uncovering Early Galaxy Evolution in the ALMA and JWST Era

Y2 - 3 June 2019 through 7 June 2019

ER -

3D-HST Team. An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey. In da Cunha E, da Cunha E, Hodge J, Afonso J, Pentericci L, Sobral D, editors, Proceedings of the International Astronomical Union. 352 ed. Cambridge University Press. 2020. p. 99-102. (Proceedings of the International Astronomical Union; 352). doi: 10.1017/S1743921319009025

An older, more quiescent universe from panchromatic SED fitting of the 3D-HST survey

Abstract

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