Browsing by Author "Coe, Dan"

Now showing 1 - 5 of 5
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    A HIGHLY ELONGATED PROMINENT LENS AT z=0.87 : FIRST STRONG-LENSING ANALYSIS OF EL GORDO
    (2013) Zitrin, Adi; Menanteau, Felipe; Hughes, John P.; Coe, Dan; Barrientos, Luis Felipe; Infante Lira, Leopoldo; Mandelbaum, Rachel
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    A variable active galactic nucleus at z=2.06 triply-imaged by the galaxy cluster MACS J0035.4-2015
    (2023) Furtak, Lukas J.; Mainali, Ramesh; Zitrin, Adi; Plat, Adele; Fujimoto, Seiji; Donahue, Megan; Nelson, Erica J.; Bauer, Franz E.; Uematsu, Ryosuke; Caminha, Gabriel B.; Andrade-Santos, Felipe; Bradley, Larry D.; Caputi, Karina, I; Charlot, Stephane; Chevallard, Jacopo; Coe, Dan; Curtis-Lake, Emma; Espada, Daniel; Frye, Brenda L.; Knudsen, Kirsten K.; Koekemoer, Anton M.; Kohno, Kotaro; Kokorev, Vasily; Laporte, Nicolas; Lee, Minju M.; Lemaux, Brian C.; Magdis, Georgios E.; Sharon, Keren; Stark, Daniel P.; Su, Yuanyuan; Suess, Katherine A.; Ueda, Yoshihiro; Umehata, Hideki; Vidal-Garcia, Alba; Wu, John F.
    We report the discovery of a triply imaged active galactic nucleus (AGN), lensed by the galaxy cluster MACS J0035.4-2015 (z(d) = 0.352). The object is detected in Hubble Space Telescope imaging taken for the RELICS program. It appears to have a quasi-stellar nucleus consistent with a point-source, with a de-magnified radius of r(e) less than or similar to 100 pc. The object is spectroscopically confirmed to be an AGN at z spec = 2.063 +/- 0.005 showing broad rest-frame UV emission lines, and detected in both X-ray observations with Chandra and in ALCS ALMA band 6 (1.2 mm) imaging. It has a relatively faint rest-frame UV luminosity for a quasar-like object, M (UV, 1450) = -19.7 +/- 0.2. The object adds to just a few quasars or other X-ray sources known to be multiply lensed by a galaxy cluster. Some diffuse emission from the host galaxy is faintly seen around the nucleus, and there is a faint object nearby sharing the same multiple-imaging symmetry and geometric redshift, possibly an interacting galaxy or a star-forming knot in the host. We present an accompanying lens model, calculate the magnifications and time delays, and infer the physical properties of the source. We find the rest-frame UV continuum and emission lines to be dominated by the AGN, and the optical emission to be dominated by the host galaxy of modest stellar mass M-* similar or equal to 10(9.2) M-circle dot. We also observe some variation in the AGN emission with time, which may suggest that the AGN used to be more active. This object adds a low-redshift counterpart to several relatively faint AGN recently uncovered at high redshifts with HST and JWST.
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    Clash : Extreme emission-line galaxies and their implication on selection of high-redshift galaxies
    (2015) Huang, Xingxing; Zheng, Wei; Wang, Junxian; Ford, Holland; Lemze, Doron; Infante Lira, Leopoldo; Moustakas, John; Shu, Xinwen; Van der Wel, Arjen; Zitrin, Adi; Frye, Brenda L.; Postman, Marc; Bartelmann, Matthias; Benítez, Narciso; Bradley, Larry; Broadhurst, Tom; Coe, Dan; Donahue, Megan; Kelson, Daniel; Koekemoer, Anton
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    The Extended [C ii] under Construction? Observation of the Brightest High-z Lensed Star-forming Galaxy at z=6.2
    (2024) Fudamoto, Yoshinobu; Inoue, Akio K.; Coe, Dan; Welch, Brian; Acebron, Ana; Ricotti, Massimo; Mandelker, Nir; Windhorst, Rogier A.; Xu, Xinfeng; Sugahara, Yuma; Bauer, Franz E.; Bradac, Marusa; Bradley, Larry D.; Diego, Jose M.; Florian, Michael; Frye, Brenda; Fujimoto, Seiji; Hashimoto, Takuya; Henry, Alaina; Mahler, Guillaume; Oesch, Pascal A.; Ravindranath, Swara; Rigby, Jane; Sharon, Keren; Strait, Victoria; Tamura, Yoichi; Trenti, Michele; Vanzella, Eros; Zackrisson, Erik; Zitrin, Adi
    We present results of [C ii] 158 mu m emission line observations, and report the spectroscopic redshift confirmation of a strongly lensed (mu similar to 20) star-forming galaxy, MACS0308-zD1 at z = 6.2078 +/- 0.0002. The [C ii] emission line is detected with a signal-to-noise ratio >6 within the rest-frame UV-bright clump of the lensed galaxy (zD1.1) and exhibits multiple velocity components; the narrow [C ii] has a velocity full width half maximum (FWHM) of 110 +/- 20 km s(-1), while broader [C ii] is seen with an FWHM of 230 +/- 50 km s(-1). The broader [C ii] component is blueshifted (-80 +/- 20 km s(-1)) with respect to the narrow [C ii] component, and has a morphology that extends beyond the UV-bright clump. We find that, while the narrow [C ii] emission is most likely associated with zD1.1, the broader component is possibly associated with a physically distinct gas component from zD1.1 (e.g., outflowing or inflowing gas). Based on the nondetection of lambda(158 mu m) dust continuum, we find that MACS0308-zD1's star formation activity occurs in a dust-free environment indicated by a strong upper limit of infrared luminosity less than or similar to 9 x 10(8)L(circle dot). Targeting this strongly lensed faint galaxy for follow-up Atacama Large Millimeter/submillimeter Array and JWST observations will be crucial to characterize the details of typical galaxy growth in the early Universe.
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    Unveiling the Dynamical State of Massive Clusters through the ICL Fraction
    (2018) Jimenez-Teja, Yolanda; Dupke, Renato; Benitez, Narciso; Koekemoer, Anton M.; Zitrin, Adi; Umetsu, Keiichi; Ziegler, Bodo L.; Frye, Brenda L.; Ford, Holland; Bouwens, Rychard J.; Bradley, Larry D.; Broadhurst, Thomas; Coe, Dan; Donahue, Megan|