Search Results - "Sand, David J"

THE DENSITY PROFILES OF MASSIVE, RELAXED GALAXY CLUSTERS. II. SEPARATING LUMINOUS AND DARK MATTER IN CLUSTER CORES by Newman, Andrew B, Treu, Tommaso, Ellis, Richard S, Sand, David J

“…We present stellar and dark matter (DM) density profiles for a sample of seven massive, relaxed galaxy clusters derived from strong and weak gravitational…”
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High-resolution Spectroscopy of SN 2023ixf’s First Week: Engulfing the Asymmetric Circumstellar Material by Smith, Nathan, Pearson, Jeniveve, Sand, David J., Ilyin, Ilya, Bostroem, K. Azalee, Hosseinzadeh, Griffin, Shrestha, Manisha

“…Abstract We present a series of high-resolution echelle spectra of SN 2023ixf in M101, obtained nightly during the first week or so after discovery using PEPSI…”
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A Deeper Look at the New Milky Way Satellites: Sagittarius II, Reticulum II, Phoenix II, and Tucana III by Mutlu-Pakdil, Burçin, Sand, David J., Carlin, Jeffrey L., Spekkens, Kristine, Caldwell, Nelson, Crnojević, Denija, Hughes, Allison K., Willman, Beth, Zaritsky, Dennis

“…Abstract We present deep Magellan /Megacam stellar photometry of four recently discovered faint Milky Way satellites: Sagittarius II (Sgr II), Reticulum II…”
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THE DENSITY PROFILES OF MASSIVE, RELAXED GALAXY CLUSTERS. I. THE TOTAL DENSITY OVER THREE DECADES IN RADIUS by Newman, Andrew B, Treu, Tommaso, Ellis, Richard S, Sand, David J, Nipoti, Carlo, Richard, Johan, JULLO, ERIC

“…Clusters of galaxies are excellent locations to probe the distribution of baryons and dark matter (DM) over a wide range of scales. We study a sample of seven…”
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Systematically Measuring Ultradiffuse Galaxies (SMUDGes). IV. Ultradiffuse Satellites of Milky Way Analogs by Goto, Hina, Zaritsky, Dennis, Karunakaran, Ananthan, Donnerstein, Richard, Sand, David J.

“…Abstract To better understand the formation of large, low-surface-brightness galaxies, we measure the correlation function between ultradiffuse galaxy (UDG)…”
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The Young and Nearby Normal Type Ia Supernova 2018gv: UV-optical Observations and the Earliest Spectropolarimetry by Yang, Yi, Hoeflich, Peter, Baade, Dietrich, Maund, Justyn R., Wang, Lifan, Brown, Peter. J., Stevance, Heloise F., Arcavi, Iair, Burke, Jamison, Cikota, Aleksandar, Clocchiatti, Alejandro, Gal-Yam, Avishay, Graham, Melissa. L., Hiramatsu, Daichi, Hosseinzadeh, Griffin, Howell, D. Andrew, Jha, Saurabh W., McCully, Curtis, Patat, Ferdinando, Sand, David. J., Schulze, Steve, Spyromilio, Jason, Valenti, Stefano, Vinkó, József, Wang, Xiaofeng, Wheeler, J. Craig, Yaron, Ofer, Zhang, Jujia

“…Abstract The nondetection of companion stars in SN Ia progenitor systems lends support to the notion of double-degenerate systems and explosions triggered by…”
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The First Systematic Study of Type Ibc Supernova Multi-band Light Curves by Drout, Maria R, Soderberg, Alicia M, Gal-Yam, Avishay, Cenko, S. Bradley, Fox, Derek B, Leonard, Douglas C, Sand, David J, Moon, Dae-Sik, Arcavi, Iair, Green, Yoav

“…We present detailed optical photometry for 25 Type Ibc supernovae (SNe Ibc) within d 150 Mpc obtained with the robotic Palomar 60 inch telescope in 2004-2007…”
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Hubble Space Telescope Observations of NGC 253 Dwarf Satellites: Three Ultra-faint Dwarf Galaxies by Mutlu-Pakdil, Burçin, Sand, David J., Crnojević, Denija, Jones, Michael G., Caldwell, Nelson, Guhathakurta, Puragra, Seth, Anil C., Simon, Joshua D., Spekkens, Kristine, Strader, Jay, Toloba, Elisa

“…Abstract We present deep Hubble Space Telescope (HST) imaging of five faint dwarf galaxies associated with the nearby spiral NGC 253 (D ≈ 3.5 Mpc). Three of…”
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Early Spectroscopy and Dense Circumstellar Medium Interaction in SN 2023ixf by Bostroem, K. Azalee, Pearson, Jeniveve, Shrestha, Manisha, Sand, David J., Valenti, Stefano, Jha, Saurabh W., Andrews, Jennifer E., Smith, Nathan, Terreran, Giacomo, Green, Elizabeth, Dong, Yize, Lundquist, Michael, Haislip, Joshua, Hoang, Emily T., Hosseinzadeh, Griffin, Janzen, Daryl, Jencson, Jacob E., Kouprianov, Vladimir, Paraskeva, Emmy, Meza Retamal, Nicolas E., Reichart, Daniel E., Arcavi, Iair, Bonanos, Alceste Z., Coughlin, Michael W., Dobson, Ross, Farah, Joseph, Galbany, Lluís, Gutiérrez, Claudia, Hawley, Suzanne, Hebb, Leslie, Hiramatsu, Daichi, Howell, D. Andrew, Iijima, Takashi, Ilyin, Ilya, Jhass, Kiran, McCully, Curtis, Moran, Sean, Morris, Brett M., Mura, Alessandra C., Müller-Bravo, Tomás E., Munday, James, Newsome, Megan, Pabst, Maria Th, Ochner, Paolo, Gonzalez, Estefania Padilla, Pastorello, Andrea, Pellegrino, Craig, Piscarreta, Lara, Ravi, Aravind P., Reguitti, Andrea, Salo, Laura, Vinkó, József, de Vos, Kellie, Wheeler, J. C., Williams, G. Grant, Wyatt, Samuel

“…Abstract We present the optical spectroscopic evolution of SN 2023ixf seen in subnight cadence spectra from 1.18 to 15 days after explosion. We identify…”
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The Gravitational Wave Treasure Map: A Tool to Coordinate, Visualize, and Assess the Electromagnetic Follow-up of Gravitational-wave Events by Wyatt, Samuel D., Tohuvavohu, Aaron, Arcavi, Iair, Lundquist, Michael J., Howell, D. Andrew, Sand, David J.

“…We present the Gravitational Wave (GW) Treasure Map, a tool to coordinate, visualize, and assess the electromagnetic (EM) followup of GW events. With typical…”
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Shock Cooling and Possible Precursor Emission in the Early Light Curve of the Type II SN 2023ixf by Hosseinzadeh, Griffin, Farah, Joseph, Shrestha, Manisha, Sand, David J., Dong, Yize, Brown, Peter J., Bostroem, K. Azalee, Valenti, Stefano, Jha, Saurabh W., Andrews, Jennifer E., Arcavi, Iair, Haislip, Joshua, Hiramatsu, Daichi, Hoang, Emily, Howell, D. Andrew, Janzen, Daryl, Jencson, Jacob E., Kouprianov, Vladimir, Lundquist, Michael, McCully, Curtis, Meza Retamal, Nicolas E., Modjaz, Maryam, Newsome, Megan, Gonzalez, Estefania Padilla, Pearson, Jeniveve, Pellegrino, Craig, Ravi, Aravind P., Reichart, Daniel E., Smith, Nathan, Terreran, Giacomo, Vinkó, József

“…Abstract We present the densely sampled early light curve of the Type II supernova (SN) 2023ixf, first observed within hours of explosion in the nearby…”
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SN 2012cg: EVIDENCE FOR INTERACTION BETWEEN A NORMAL SN Ia AND A NON-DEGENERATE BINARY COMPANION by Marion, G. H., Brown, Peter J., Vinkó, Jozsef, Silverman, Jeffrey M., Sand, David J., Challis, Peter, Kirshner, Robert P., Wheeler, J. Craig, Berlind, Perry, Brown, Warren R., Calkins, Michael L., Camacho, Yssavo, Dhungana, Govinda, Foley, Ryan J., Friedman, Andrew S., Graham, Melissa L., Howell, D. Andrew, Hsiao, Eric Y., Irwin, Jonathan M., Jha, Saurabh W., Kehoe, Robert, Macri, Lucas M., Maeda, Keiichi, Mandel, Kaisey, McCully, Curtis, Pandya, Viraj, Rines, Kenneth J., Wilhelmy, Steven, Zheng, Weikang

“…ABSTRACT We report evidence for excess blue light from the Type Ia supernova (Sn Ia) SN 2012cg at 15 and 16 days before maximum B-band brightness. The emission…”
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Gas-rich, Field Ultra-diffuse Galaxies Host Few Gobular Clusters by Jones, Michael G., Karunakaran, Ananthan, Bennet, Paul, Sand, David J., Spekkens, Kristine, Mutlu-Pakdil, Burçin, Crnojević, Denija, Janowiecki, Steven, Leisman, Lukas, Fielder, Catherine E.

“…Abstract We present Hubble Space Telescope imaging of 14 gas-rich, low-surface-brightness galaxies in the field at distances of 25–36 Mpc, with mean effective…”
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A Luminous Red Supergiant and Dusty Long-period Variable Progenitor for SN 2023ixf by Jencson, Jacob E., Pearson, Jeniveve, Beasor, Emma R., Lau, Ryan M., Andrews, Jennifer E., Bostroem, K. Azalee, Dong, Yize, Engesser, Michael, Gomez, Sebastian, Guolo, Muryel, Hoang, Emily, Hosseinzadeh, Griffin, Jha, Saurabh W., Karambelkar, Viraj, Kasliwal, Mansi M., Lundquist, Michael, Meza Retamal, Nicolas E., Rest, Armin, Sand, David J., Shahbandeh, Melissa, Shrestha, Manisha, Smith, Nathan, Strader, Jay, Valenti, Stefano, Wang, Qinan, Zenati, Yossef

“…Abstract We analyze pre-explosion near- and mid-infrared (IR) imaging of the site of SN 2023ixf in the nearby spiral galaxy M101 and characterize the candidate…”
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Reverberation Mapping of Optical Emission Lines in Five Active Galaxies by Fausnaugh, M. M., Grier, C. J., Bentz, M. C., Denney, K. D., Rosa, G. De, Peterson, B. M., Kochanek, C. S., Pogge, R. W., Adams, S. M., Barth, A. J., Beatty, Thomas G., Bhattacharjee, A., Borman, G. A., Boroson, T. A., Bottorff, M. C., Brown, Jacob E., Brown, Jonathan S., Brotherton, M. S., Coker, C. T., Crawford, S. M., Croxall, K. V., Eftekharzadeh, Sarah, Eracleous, Michael, Joner, M. D., Henderson, C. B., Holoien, T. W.-S., Horne, Keith, Hutchison, T., Kaspi, Shai, Kim, S., King, Anthea L., Li, Miao, Lochhaas, Cassandra, Ma, Zhiyuan, MacInnis, F., Manne-Nicholas, E. R., Mason, M., Montuori, Carmen, Mosquera, Ana, Mudd, Dale, Musso, R., Nazarov, S. V., Nguyen, M. L., Okhmat, D. N., Onken, Christopher A., Ou-Yang, B., Pancoast, A., Pei, L., Penny, Matthew T., Poleski, Rados aw, Rafter, Stephen, Romero-Colmenero, E., Runnoe, Jessie, Sand, David J., Schimoia, Jaderson S., Sergeev, S. G., Shappee, B. J., Simonian, Gregory V., Somers, Garrett, Spencer, M., Starkey, D. A., Stevens, Daniel J., Tayar, Jamie, Treu, T., Valenti, Stefano, Saders, J. Van, Villanueva Jr, S., Villforth, C., Weiss, Yaniv, Winkler, H., Zhu, W.

“…We present the first results from an optical reverberation mapping campaign executed in 2014 targeting the active galactic nuclei (AGNs) MCG+08-11-011, NGC…”
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The CASSOWARY spectroscopy survey: a new sample of gravitationally lensed galaxies in SDSS by Stark, Daniel P., Auger, Matthew, Belokurov, Vasily, Jones, Tucker, Robertson, Brant, Ellis, Richard S., Sand, David J., Moiseev, Alexei, Eagle, Will, Myers, Thomas

“…Bright gravitationally lensed galaxies provide our most detailed view of galaxies at high redshift. The very brightest (r < 21) systems enable high spatial and…”
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Hubble Space Telescope Observations of Two Faint Dwarf Satellites of Nearby LMC Analogs from MADCASH by Carlin, Jeffrey L., Mutlu-Pakdil, Burçin, Crnojević, Denija, Garling, Christopher T., Karunakaran, Ananthan, Peter, Annika H. G., Tollerud, Erik, Forbes, Duncan A., Hargis, Jonathan R., Lim, Sungsoon, Romanowsky, Aaron J., Sand, David J., Spekkens, Kristine, Strader, Jay

“…Abstract We present a deep Hubble Space Telescope (HST) imaging study of two dwarf galaxies in the halos of Local Volume Large Magellanic Cloud (LMC) analogs…”
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A Comprehensive Optical Search for Pre-explosion Outbursts from the Quiescent Progenitor of SN 2023ixf by Dong, Yize, Sand, David J., Valenti, Stefano, Bostroem, K. Azalee, Andrews, Jennifer E., Hosseinzadeh, Griffin, Hoang, Emily, Janzen, Daryl, Jencson, Jacob E., Lundquist, Michael, Meza Retamal, Nicolas E., Pearson, Jeniveve, Shrestha, Manisha, Haislip, Joshua, Kouprianov, Vladimir, Reichart, Daniel E.

“…Abstract We perform a comprehensive search for optical precursor emission at the position of SN 2023ixf using data from the DLT40, ZTF, and ATLAS surveys. By…”
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JWST Reveals a Luminous Infrared Source at the Position of the Failed Supernova Candidate N6946-BH1 by Beasor, Emma R., Hosseinzadeh, Griffin, Smith, Nathan, Davies, Ben, Jencson, Jacob E., Pearson, Jeniveve, Sand, David J.

“…Abstract N6946-BH1 (BH1) is the first plausible candidate for a failed supernova (SN), a peculiar event in which a massive star disappears without the expected…”
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Numerically Modeling the First Peak of the Type IIb SN 2016gkg by Piro, Anthony L., Muhleisen, Marc, Arcavi, Iair, Sand, David J., Tartaglia, Leonardo, Valenti, Stefano

“…Many Type IIb supernovae (SNe) show a prominent additional early peak in their light curves, which is generally thought to be due to the shock cooling of…”
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