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Future Fellowships - Grant ID: FT140100933

Future Fellowships - Grant ID: FT140100933
ARC | Future Fellowships
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  • Large scale structure around a z=2.1 cluster

    Hung, Chao-Ling; Casey, Caitlin M.; Chiang, Yi-Kuan; Capak, Peter; Cowley, Michael J.; Darvish, Behnam; Kacprzak, Glenn G.; Kovac, K.; Lilly, Simon J.; Nanayakkara, Themiya; Spitler, Lee R.; Tran, Kim-Vy H.; Yuan, Tiantian (2016)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    The most prodigious starburst galaxies are absent in massive galaxy clusters today, but their connection with large scale environments is less clear at $z\gtrsim2$. We present a search of large scale structure around a galaxy cluster core at $z=2.095$ using a set of spectroscopically confirmed galaxies. We find that both color-selected star-forming galaxies (SFGs) and dusty star-forming galaxies (DSFGs) show significant overdensities around the $z=2.095$ cluster. A total of 8 DSFGs (including...

    Radio galaxies in ZFOURGE/NMBS: no difference in the properties of massive galaxies with and without radio-AGN out to z = 2.25

    Rees, G. A.; Spitler, L. R.; Norris, R. P.; Cowley, M. J.; Papovich, C.; Glazebrook, K.; Quadri, R. F.; Straatman, C. M. S.; Allen, R.; Kacprzak, G. G.; Labbe, I.; Nanayakkara, T.; Tomczak, A. R.; Tran, K. -V. (2015)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    In order to reproduce the high-mass end of the galaxy mass-distribution, some process must be responsible for the suppression of star-formation in the most massive of galaxies. Commonly Active Galactic Nuclei (AGN) are invoked to fulfil this role, but the exact means by which they do so is still the topic of much debate, with studies finding evidence for both the suppression and enhancement of star-formation in AGN hosts. Using the ZFOURGE and NMBS galaxy surveys, we investigate the host gala...

    Observational signatures of a warped disk associated with cold-flow accretion

    Rahmani, Hadi; Péroux, Céline; Augustin, Ramona; Husemann, Bernd; Kacprzak, Glenn G.; Kulkarni, Varsha; Milliard, Bruno; Møller, Palle; Pettini, Max; Straka, Lorrie; Vernet, Joël; York, Donald G. (2017)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    We present MUSE observations of the field of the quasar Q0152$-$020 whose spectrum shows a Lyman limit system (LLS) at redshift $z_{\rm abs} = 0.38$, with a metallicity Z $\gtrsim 0.06$ Z$_\odot$. The low ionization metal lines associated with the LLS present two narrow distinct absorption components with a velocity separation of 26 km ${\rm s}^{-1}$. We detect six galaxies within 600 km ${\rm s}^{-1}$ from the absorption redshift; their projected distances from the quasar sightline range fro...

    Understanding the strong intervening OVI absorber at z$_{abs}$ ~0.93 towards PG1206+459

    Rosenwasser, Benjamin E.; Muzahid, Sowgat; Charlton, Jane C.; Kacprzak, Glenn G.; Wakker, Bart P.; Churchill, Christopher W. (2018)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    We have obtained new observations of the partial Lyman limit absorber at \zabs$=0.93$ towards quasar PG~1206+459, and revisit its chemical and physical conditions. The absorber, with $ N(HI) \sim 10^{17.0}$ ~\sqcm\ and absorption lines spread over $\gtrsim$1000~\kms\ in velocity, is one of the strongest known OVI absorbers at $\log N(OVI)=$15.54$\pm$0.17. Our analysis makes use of the previously known low-(e.g. \MgII), intermediate-(e.g. SiIV), and high-ionization (e.g., CIV, NV, NeVIII) meta...

    The Azimuthal Dependence of Outflows and Accretion Detected Using OVI Absorption

    Kacprzak, Glenn G.; Muzahid, Sowgat; Churchill, Christopher W.; Nielsen, Nikole M.; Charlton, Jane C. (2015)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    We report a bimodality in the azimuthal angle ($\Phi$) distribution of gas around galaxies traced by OVI absorption. We present the mean $\Phi$ probability distribution function of 29 HST-imaged OVI absorbing (EW>0.1A) and 24~non-absorbing (EW

    Molecular Hydrogen Absorption from the Halo of a z ~ 0.4 Galaxy

    Muzahid, Sowgat; Kacprzak, Glenn G.; Charlton, Jane C.; Churchill, Christopher W. (2016)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    Lyman- and Werner-band absorption of molecular hydrogen (H$_2$) is detected in $\sim$50% of low redshift ($z 10$^{14.4}$ cm$^{-2}$. However the true origin(s) of the H$_2$ bearing gas remain elusive. Here we report a new detection of an H$_{2}$ absorber at $z=$ 0.4298 in the HST/COS spectra of quasar PKS 2128-123. The total $N$(HI) of 10$^{19.50\pm0.15}$ cm$^{-2}$ classifies the absorber as a sub-DLA. H$_{2}$ absorption is detected up to the $J=3$ rotational level with a total $\log N$(H$_{2}...

    Gas Accretion in Star-Forming Galaxies

    Cold-mode gas accretion onto galaxies is a direct prediction of LCDM simulations and provides galaxies with fuel that allows them to continue to form stars over the lifetime of the Universe. Given its dramatic influence on a galaxy's gas reservoir, gas accretion has to be largely responsible for how galaxies form and evolve. Therefore, given the importance of gas accretion, it is necessary to observe and quantify how these gas flows affect galaxy evolution. However, observational data have ye...

    Jekyll & Hyde: quiescence and extreme obscuration in a pair of massive galaxies 1.5 Gyr after the Big Bang

    Schreiber, Corentin; Labbé, Ivo; Glazebrook, Karl; Bekiaris, Georgios; Papovich, Casey; Costa, Tiago; Elbaz, David; Kacprzak, Glenn G.; Nanayakkara, Themiya; Oesch, Pascal; Pannella, Maurilio; Spitler, Lee; Straatman, Caroline; Tran, Kim-Vy; Wang, Tao (2017)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    We obtained ALMA spectroscopy and imaging to investigate the origin of the unexpected sub-mm emission toward the most distant quiescent galaxy known to date, ZF-COSMOS-20115 at z=3.717. We show here that this sub-mm emission is produced by another massive, compact and extremely obscured galaxy, located only 3.1 kpc away from the quiescent galaxy. We dub the quiescent and dusty galaxies Jekyll and Hyde, respectively. No dust emission is detected at the location of Jekyll, implying SFR < 13 Msu...

    An Extreme Metallicity, Large-Scale Outflow from a Star-Forming Galaxy at z ~ 0.4

    Muzahid, Sowgat; Kacprzak, Glenn G.; Churchill, Christopher W.; Charlton, Jane C.; Nielsen, Nikole M.; Mathes, Nigel L.; Trujillo-Gomez, Sebastian (2015)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933)
    We present a detailed analysis of a large-scale galactic outflow in the CGM of a massive (M_h ~ 10^12.5 Msun), star-forming (6.9 Msun/yr), sub-L* (0.5 L_B*) galaxy at z=0.39853 that exhibits a wealth of metal-line absorption in the spectra of the background quasar Q 0122-003 at an impact parameter of 163 kpc. The galaxy inclination angle (i=63 degree) and the azimuthal angle (Phi=73 degree) imply that the QSO sightline is passing through the projected minor-axis of the galaxy. The absorption ...

    UV to IR Luminosities and Dust Attenuation Determined from ~4000 K-Selected Galaxies at 1<z<3 in the ZFOURGE Survey

    Forrest, Ben; Tran, Kim-Vy H.; Tomczak, Adam R.; Broussard, Adam; Labbé, Ivo; Papovich, Casey; Kriek, Mariska; Allen, Rebecca J.; Cowley, Michael; Dickinson, Mark; Glazebrook, Karl; van Houdt, Josha; Inami, Hanae; Kacprzak, Glenn G.; Kawinwanichakij, Lalitwadee;... (2016)
    Projects: ARC | Future Fellowships - Grant ID: FT140100933 (FT140100933), NSF | At the Turn of the Tide: Cool Gas and Star Formation in Galaxy Clusters (1410728)
    We build a set of composite galaxy SEDs by de-redshifting and scaling multi-wavelength photometry from galaxies in the ZFOURGE survey, covering the CDFS, COSMOS, and UDS fields. From a sample of ~4000 K_s-band selected galaxies, we define 38 composite galaxy SEDs that yield continuous low-resolution spectra (R~45) over the rest-frame range 0.1-4 um. Additionally, we include far infrared photometry from the Spitzer Space Telescope and the Herschel Space Observatory to characterize the infrared...
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