Implications of a Temperature-dependent Initial Mass Function. II. An Updated View of the Star-forming Main Sequence
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Implications of a Temperature-dependent Initial Mass Function. II. An Updated View of the Star-forming Main Sequence. / Steinhardt, Charles L.; Sneppen, Albert; Mostafa, Basel; Hensley, Hagan; Jermyn, Adam S.; Lopez, Adrian; Weaver, John; Brammer, Gabriel; Clark, Thomas H.; Davidzon, Iary; Diaconu, Andrei C.; Mobasher, Bahram; Rusakov, Vadim; Toft, Sune.
In: Astrophysical Journal, Vol. 931, No. 1, 58, 25.05.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Implications of a Temperature-dependent Initial Mass Function. II. An Updated View of the Star-forming Main Sequence
AU - Steinhardt, Charles L.
AU - Sneppen, Albert
AU - Mostafa, Basel
AU - Hensley, Hagan
AU - Jermyn, Adam S.
AU - Lopez, Adrian
AU - Weaver, John
AU - Brammer, Gabriel
AU - Clark, Thomas H.
AU - Davidzon, Iary
AU - Diaconu, Andrei C.
AU - Mobasher, Bahram
AU - Rusakov, Vadim
AU - Toft, Sune
PY - 2022/5/25
Y1 - 2022/5/25
N2 - The stellar initial mass function (IMF) is predicted to depend upon the temperature of gas in star-forming molecular clouds. The introduction of an additional parameter, T (IMF), into photometric template fitting, allows galaxies to be fit with a range of IMFs. Three surprising new features appear: (1) most star-forming galaxies are best fit with a bottom-lighter IMF than the Milky Way; (2) most star-forming galaxies at fixed redshift are fit with a very similar IMF; and (3) the most-massive star-forming galaxies at fixed redshift instead exhibit a less bottom-light IMF, similar to that measured in quiescent galaxies. Additionally, since stellar masses and star formation rates both depend on the IMF, these results slightly modify the resulting relationship, while yielding similar qualitative characteristics to previous studies.
AB - The stellar initial mass function (IMF) is predicted to depend upon the temperature of gas in star-forming molecular clouds. The introduction of an additional parameter, T (IMF), into photometric template fitting, allows galaxies to be fit with a range of IMFs. Three surprising new features appear: (1) most star-forming galaxies are best fit with a bottom-lighter IMF than the Milky Way; (2) most star-forming galaxies at fixed redshift are fit with a very similar IMF; and (3) the most-massive star-forming galaxies at fixed redshift instead exhibit a less bottom-light IMF, similar to that measured in quiescent galaxies. Additionally, since stellar masses and star formation rates both depend on the IMF, these results slightly modify the resulting relationship, while yielding similar qualitative characteristics to previous studies.
KW - GALAXY FORMATION
KW - STELLAR
KW - DUST
KW - EVOLUTION
KW - UNCERTAINTIES
KW - PROPAGATION
KW - QUIESCENT
KW - EMISSION
KW - SILICATE
KW - MODELS
U2 - 10.3847/1538-4357/ac62d6
DO - 10.3847/1538-4357/ac62d6
M3 - Journal article
VL - 931
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 58
ER -
ID: 315767354