The MOSDEF survey: a new view of a remarkable z=1.89 merger

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

The MOSDEF survey : a new view of a remarkable z=1.89 merger. / Runco, Jordan N.; Shapley, Alice E.; Kriek, Mariska; Cappellari, Michele; Topping, Michael W.; Sanders, Ryan L.; Kokorev, Vasily; Price, Sedona H.; Reddy, Naveen A.; Coil, Alison L.; Mobasher, Bahram; Siana, Brian; Zick, Tom; Magdis, Georgios E.; Brammer, Gabriel; Aird, James.

In: Monthly Notices of the Royal Astronomical Society, Vol. 517, No. 3, 02.11.2022, p. 4405-4416.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Runco, JN, Shapley, AE, Kriek, M, Cappellari, M, Topping, MW, Sanders, RL, Kokorev, V, Price, SH, Reddy, NA, Coil, AL, Mobasher, B, Siana, B, Zick, T, Magdis, GE, Brammer, G & Aird, J 2022, 'The MOSDEF survey: a new view of a remarkable z=1.89 merger', Monthly Notices of the Royal Astronomical Society, vol. 517, no. 3, pp. 4405-4416. https://doi.org/10.1093/mnras/stac2863

APA

Runco, J. N., Shapley, A. E., Kriek, M., Cappellari, M., Topping, M. W., Sanders, R. L., Kokorev, V., Price, S. H., Reddy, N. A., Coil, A. L., Mobasher, B., Siana, B., Zick, T., Magdis, G. E., Brammer, G., & Aird, J. (2022). The MOSDEF survey: a new view of a remarkable z=1.89 merger. Monthly Notices of the Royal Astronomical Society, 517(3), 4405-4416. https://doi.org/10.1093/mnras/stac2863

Vancouver

Runco JN, Shapley AE, Kriek M, Cappellari M, Topping MW, Sanders RL et al. The MOSDEF survey: a new view of a remarkable z=1.89 merger. Monthly Notices of the Royal Astronomical Society. 2022 Nov 2;517(3):4405-4416. https://doi.org/10.1093/mnras/stac2863

Author

Runco, Jordan N. ; Shapley, Alice E. ; Kriek, Mariska ; Cappellari, Michele ; Topping, Michael W. ; Sanders, Ryan L. ; Kokorev, Vasily ; Price, Sedona H. ; Reddy, Naveen A. ; Coil, Alison L. ; Mobasher, Bahram ; Siana, Brian ; Zick, Tom ; Magdis, Georgios E. ; Brammer, Gabriel ; Aird, James. / The MOSDEF survey : a new view of a remarkable z=1.89 merger. In: Monthly Notices of the Royal Astronomical Society. 2022 ; Vol. 517, No. 3. pp. 4405-4416.

Bibtex

@article{b6a131f54f1044768d69bbb4350311d6,
title = "The MOSDEF survey: a new view of a remarkable z=1.89 merger",
abstract = "We present a detailed study of a galaxy merger taking place at z = 1.89 in the GOODS-S field. Here, we analyse Keck/MOSFIRE spectroscopic observations from the MOSFIRE Deep Evolution Field (MOSDEF) survey along with multiwavelength photometry assembled by the 3D-HST survey. The combined data set is modelled to infer the past star formation histories (SFHs) of both merging galaxies. They are found to be massive, with log(10) (M-*/M-circle dot) > 11, with a close mass ratio satisfying the typical major-merger definition. Additionally, in the context of delayed-r models, GOODS-S 43114, and GOODS-S 43683 have similar SFHs and low star formation rates (log (10)(SFR(SED)/M-circle dot yr(-1)) < 1.0) compared to their past averages. The best-fitting model SEDs show elevated H delta(A) values for both galaxies, indicating that their stellar spectra are dominated by A-type stars, and that star formation peaked similar to 0.5-1 Gyr ago and has recently declined. Additionally, based on SED fitting both merging galaxies turned on and shut off star formation within a few hundred Myr of each other, suggesting that their bursts of star formation may be linked. Combining the SFI Is and H delta(A) results with recent galaxy merger simulations, we infer that these galaxies have recently completed their first pericentric passage and are moving apart. Finally, the relatively low second velocity moment of GOODS-S 43114, given its stellar mass suggests a disc-like structure. However, including the geometry of the galaxy in the modelling does not completely resolve the discrepancy between the dynamical and stellar masses. Future work is needed to resolve this inconsistency in mass.",
keywords = "galaxies: evolution, galaxies: high-redshift, galaxies: interactions, DIGITAL SKY SURVEY, STELLAR POPULATION SYNTHESIS, TO-LIGHT RATIO, INFRARED SPECTROSCOPIC SURVEY, SUPERMASSIVE BLACK-HOLES, ENHANCED STAR-FORMATION, K-SELECTED GALAXIES, DEEP-FIELD-SOUTH, QUIESCENT GALAXIES, STARBURST GALAXIES",
author = "Runco, {Jordan N.} and Shapley, {Alice E.} and Mariska Kriek and Michele Cappellari and Topping, {Michael W.} and Sanders, {Ryan L.} and Vasily Kokorev and Price, {Sedona H.} and Reddy, {Naveen A.} and Coil, {Alison L.} and Bahram Mobasher and Brian Siana and Tom Zick and Magdis, {Georgios E.} and Gabriel Brammer and James Aird",
year = "2022",
month = nov,
day = "2",
doi = "10.1093/mnras/stac2863",
language = "English",
volume = "517",
pages = "4405--4416",
journal = "Royal Astronomical Society. Monthly Notices",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",

}

RIS

TY - JOUR

T1 - The MOSDEF survey

T2 - a new view of a remarkable z=1.89 merger

AU - Runco, Jordan N.

AU - Shapley, Alice E.

AU - Kriek, Mariska

AU - Cappellari, Michele

AU - Topping, Michael W.

AU - Sanders, Ryan L.

AU - Kokorev, Vasily

AU - Price, Sedona H.

AU - Reddy, Naveen A.

AU - Coil, Alison L.

AU - Mobasher, Bahram

AU - Siana, Brian

AU - Zick, Tom

AU - Magdis, Georgios E.

AU - Brammer, Gabriel

AU - Aird, James

PY - 2022/11/2

Y1 - 2022/11/2

N2 - We present a detailed study of a galaxy merger taking place at z = 1.89 in the GOODS-S field. Here, we analyse Keck/MOSFIRE spectroscopic observations from the MOSFIRE Deep Evolution Field (MOSDEF) survey along with multiwavelength photometry assembled by the 3D-HST survey. The combined data set is modelled to infer the past star formation histories (SFHs) of both merging galaxies. They are found to be massive, with log(10) (M-*/M-circle dot) > 11, with a close mass ratio satisfying the typical major-merger definition. Additionally, in the context of delayed-r models, GOODS-S 43114, and GOODS-S 43683 have similar SFHs and low star formation rates (log (10)(SFR(SED)/M-circle dot yr(-1)) < 1.0) compared to their past averages. The best-fitting model SEDs show elevated H delta(A) values for both galaxies, indicating that their stellar spectra are dominated by A-type stars, and that star formation peaked similar to 0.5-1 Gyr ago and has recently declined. Additionally, based on SED fitting both merging galaxies turned on and shut off star formation within a few hundred Myr of each other, suggesting that their bursts of star formation may be linked. Combining the SFI Is and H delta(A) results with recent galaxy merger simulations, we infer that these galaxies have recently completed their first pericentric passage and are moving apart. Finally, the relatively low second velocity moment of GOODS-S 43114, given its stellar mass suggests a disc-like structure. However, including the geometry of the galaxy in the modelling does not completely resolve the discrepancy between the dynamical and stellar masses. Future work is needed to resolve this inconsistency in mass.

AB - We present a detailed study of a galaxy merger taking place at z = 1.89 in the GOODS-S field. Here, we analyse Keck/MOSFIRE spectroscopic observations from the MOSFIRE Deep Evolution Field (MOSDEF) survey along with multiwavelength photometry assembled by the 3D-HST survey. The combined data set is modelled to infer the past star formation histories (SFHs) of both merging galaxies. They are found to be massive, with log(10) (M-*/M-circle dot) > 11, with a close mass ratio satisfying the typical major-merger definition. Additionally, in the context of delayed-r models, GOODS-S 43114, and GOODS-S 43683 have similar SFHs and low star formation rates (log (10)(SFR(SED)/M-circle dot yr(-1)) < 1.0) compared to their past averages. The best-fitting model SEDs show elevated H delta(A) values for both galaxies, indicating that their stellar spectra are dominated by A-type stars, and that star formation peaked similar to 0.5-1 Gyr ago and has recently declined. Additionally, based on SED fitting both merging galaxies turned on and shut off star formation within a few hundred Myr of each other, suggesting that their bursts of star formation may be linked. Combining the SFI Is and H delta(A) results with recent galaxy merger simulations, we infer that these galaxies have recently completed their first pericentric passage and are moving apart. Finally, the relatively low second velocity moment of GOODS-S 43114, given its stellar mass suggests a disc-like structure. However, including the geometry of the galaxy in the modelling does not completely resolve the discrepancy between the dynamical and stellar masses. Future work is needed to resolve this inconsistency in mass.

KW - galaxies: evolution

KW - galaxies: high-redshift

KW - galaxies: interactions

KW - DIGITAL SKY SURVEY

KW - STELLAR POPULATION SYNTHESIS

KW - TO-LIGHT RATIO

KW - INFRARED SPECTROSCOPIC SURVEY

KW - SUPERMASSIVE BLACK-HOLES

KW - ENHANCED STAR-FORMATION

KW - K-SELECTED GALAXIES

KW - DEEP-FIELD-SOUTH

KW - QUIESCENT GALAXIES

KW - STARBURST GALAXIES

U2 - 10.1093/mnras/stac2863

DO - 10.1093/mnras/stac2863

M3 - Journal article

VL - 517

SP - 4405

EP - 4416

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

SN - 0035-8711

IS - 3

ER -

ID: 325826476