Now showing items 1-10 of 10

    • The Distortion of the Cosmic Microwave Background Spectrum Due to Intergalactic Dust 

      Imara, Nia; Loeb, Abraham (American Astronomical Society, 2016)
      Infrared emission from intergalactic dust might compromise the ability of future experiments to detect subtle spectral distortions in the Cosmic Microwave Background (CMB) from the early Universe. We provide the first ...
    • The Dust Emissivity Spectral Index in the Starless Core TMC-1C 

      Schnee, Scott; Enoch, Melissa; Noriega-Crespo, Alberto; Sayers, Jack; Terebey, Susan; Caselli, Paola; Foster, Jonathan B.; Goodman, Alyssa; Kauffmann, Jens; Padgett, Deborah; Rebull, Luisa; Sargent, Anneila; Shetty, Rahul (American Astronomical Society, 2009)
      In this paper, we present a dust emission map of the starless core TMC-1C taken at \(2100 \mu m\). Along with maps at 160, 450, 850, and 1200 μm, we study the dust emissivity spectral index from the (sub)millimeter spectral ...
    • The Effect of Line-of-Sight Temperature Variation and Noise on Dust Continuum Observations 

      Shetty, Rahul; Kauffmann, Jens; Schnee, Scott; Goodman, Alyssa; Ercolano, Barbara (American Astronomical Society, 2009)
      We investigate the effect of line-of-sight temperature variations and noise on two commonly used methods to determine dust properties from dust-continuum observations of dense cores. One method employs a direct fit to a ...
    • The Effect of Noise on the Dust Temperature-Spectral Index Correlation 

      Shetty, Rahul; Kauffmann, Jens; Schnee, Scott; Goodman, Alyssa (American Astronomical Society, 2009)
      We investigate how uncertainties in flux measurements affect the results from modified blackbody spectral energy distribution (SED) fits. We show that an inverse correlation between the dust temperature T and spectral index ...
    • Evidence for Grain Growth in Molecular Clouds: A Bayesian Examination of the Extinction Law in Perseus 

      Foster, Jonathan B.; Mandel, Kaisey Stephen; Pineda, Jaime; Covey, Kevin R.; Arce, Hector G.; Goodman, Alyssa (Royal Astronomical Society, 2013)
      We investigate the shape of the extinction law in two \(1^{\circ}\) square fields of the Perseus molecular cloud complex. We combine deep red-optical (r, i and z band) observations obtained using Megacam on the MMT with ...
    • Illuminating the Darkest Gamma-Ray Bursts With Radio Observations 

      Zauderer, B. A.; Berger, Edo; Margutti, R.; Levan, A. J.; Olivares E., F.; Perley, D. A.; Fong, W.; Horesh, A.; Updike, A. C.; Greiner, J.; Tanvir, N. R.; Laskar, T.; Chornock, R.; Soderberg, Alicia M.; Menten, K. M.; Nakar, E.; Carpenter, J.; Chandra, P.; Castro-Tirado, A. J.; Bremer, M.; Gorosabel, J.; Guziy, S.; Pérez-Ramírez, D.; Winters, J. M. (IOP Publishing, 2013)
      We present X-ray, optical, near-infrared (IR), and radio observations of GRBs 110709B and 111215A, as well as optical and near-IR observations of their host galaxies. The combination of X-ray detections and deep optical/near-IR ...
    • Limits on Intergalactic Dust During Reionization 

      Imara, Nia; Loeb, Abraham (American Astronomical Society, 2016)
      In this Letter, we constrain the dust-to-gas ratio in the intergalactic medium (IGM) at high redshifts. We employ models for dust in the local Universe to contrain the dust-to-gas ratio during the epoch of reionization at ...
    • Star Formation in the Taurus filament L 1495: from Dense Cores to Stars 

      Schmalzl, Markus; Kainulainen, Jouni; Quanz, Sascha P.; Alves, João; Goodman, Alyssa; Henning, Thomas; Launhardt, Ralf; Pineda, Jaime E.; Román-Zúñiga, Carlos G. (Institute of Physics Publishing, Inc., 2010)
      We present a study of dense structures in the L1495 filament in the Taurus Molecular Cloud and examine its star-forming properties. In particular we construct a dust extinction map of the filament using deep near-infrared ...
    • The total infrared luminosity may significantly overestimate the star formation rate of quenching and recently quenched galaxies 

      Hayward, C. C.; Lanz, L.; Ashby, Matthew L N; Fazio, Giovanni Gene; Hernquist, Lars Eric; Martinez-Galarza, J. R.; Noeske, K.; Smith, Howard A.; Wuyts, S.; Zezas, Andreas (Oxford University Press (OUP), 2014)
      The total infrared (IR) luminosity is very useful for estimating the star formation rate (SFR) of galaxies, but converting the IR luminosity into an SFR relies on assumptions that do not hold for all galaxies. We test the ...
    • The "True" Column Density Distribution in Star-Forming Molecular Clouds 

      Goodman, Alyssa; Pineda, Jaime Eduardo; Schnee, Scott (American Astronomical Society, 2009)
      We use the COMPLETE Survey's observations of the Perseus star-forming region to assess and intercompare the three methods used for measuring column density in molecular clouds: near-infrared (NIR) extinction mapping; thermal ...