Search Publications
Mass Calibration and Cosmological Analysis of the SPT-SZ Galaxy Cluster Sample Using Velocity Dispersion σ v and X-Ray Y X Measurements
Gladders, M. D.; Rest, A.; Foley, R. J. +68 more
We present a velocity-dispersion-based mass calibration of the South Pole Telescope Sunyaev-Zel'dovich effect survey (SPT-SZ) galaxy cluster sample. Using a homogeneously selected sample of 100 cluster candidates from 720 deg2 of the survey along with 63 velocity dispersion (σ v ) and 16 X-ray Y X measurements of s…
Scaling Relations Between Warm Galactic Outflows and Their Host Galaxies
Chisholm, John; Leitherer, Claus; Chen, Yanmei +3 more
We report on a sample of 48 nearby, star-forming galaxies observed with the Cosmic Origin Spectrograph on the Hubble Space Telescope. We measure the kinematics of warm gas in galactic outflows using a combination of four Si ii absorption lines. We use multi-wavelength ancillary data to estimate stellar masses (M*), star formation rates …
X-Ray Constraints on the Local Supermassive Black Hole Occupation Fraction
Treu, Tommaso; Greene, Jenny E.; Gallo, Elena +4 more
Distinct seed formation mechanisms are imprinted upon the fraction of dwarf galaxies currently containing a central supermassive black hole. Seeding by Population III remnants is expected to produce a higher occupation fraction than is generated with direct gas collapse precursors. Chandra observations of nearby early-type galaxies can directly de…
Hubble Space Telescope Proper Motion (HSTPROMO) Catalogs of Galactic Globular Cluster. II. Kinematic Profiles and Maps
Anderson, Jay; van der Marel, Roeland P.; Watkins, Laura L. +1 more
We present kinematical analyses of 22 Galactic globular clusters using the Hubble Space Telescope proper motion catalogs recently presented in Bellini et al. For most clusters, this is the first proper-motion study ever performed, and, for many, this is the most detailed kinematic study of any kind. We use cleaned samples of bright stars to determ…
Are Compton-thick AGNs the Missing Link between Mergers and Black Hole Growth?
Bell, Eric F.; Kartaltepe, Jeyhan S.; Kocevski, Dale D. +12 more
We examine the host morphologies of heavily obscured active galactic nuclei (AGNs) at z∼ 1 to test whether obscured super-massive black hole growth at this epoch is preferentially linked to galaxy mergers. Our sample consists of 154 obscured AGNs with {N}{{H}}\gt {10}23.5 {{cm}}-2 and z\lt 1.5. Using visual classif…
Density and Charge of Pristine Fluffy Particles from Comet 67P/Churyumov-Gerasimenko
Lamy, P. L.; Szego, K.; Fulle, M. +38 more
The Grain Impact Analyzer and Dust Accumulator (GIADA) instrument on board ESA’s Rosetta mission is constraining the origin of the dust particles detected within the coma of comet 67 P/Churyumov-Gerasimenko (67P). The collected particles belong to two families: (i) compact particles (ranging in size from 0.03 to 1 mm), witnessing the presence of m…
Radio Loud AGNs are Mergers
Lotz, Jennifer M.; Chiaberge, Marco; Norman, Colin +1 more
We measure the merger fraction of Type 2 radio-loud and radio-quiet active galactic nuclei (AGNs) at z\gt 1 using new samples. The objects have Hubble Space Telescope (HST) images taken with Wide Field Camera 3 (WFC3) in the IR channel. These samples are compared to the 3CR sample of radio galaxies at z\gt 1 and to a sample of non-active galaxies.…
Accretion-powered Pulsations in an Apparently Quiescent Neutron Star Binary
Deller, Adam T.; Lyne, Andrew G.; Bogdanov, Slavko +10 more
Accreting millisecond X-ray pulsars (AMXPs) are an important subset of low-mass X-ray binaries (LMXBs) in which coherent X-ray pulsations can be observed during occasional, bright outbursts (X-ray luminosity {L}{{X}}∼ {10}36 {erg} {{{s}}}-1). These pulsations show that matter is being channeled onto the neutron sta…
The MOSDEF Survey: Optical Active Galactic Nucleus Diagnostics at z ~ 2.3
Siana, Brian; Shapley, Alice E.; Aird, James +7 more
We present results from the MOSFIRE Deep Evolution Field (MOSDEF) survey on rest-frame optical active galactic nucleus (AGN) identification and completeness at z ~ 2.3. With our sample of 50 galaxies and 10 X-ray and IR-selected AGNs with measured Hβ, [O III], Hα, and N II emission lines, we investigate the location of AGNs in the BPT, MEx (mass-e…
Measurements of Sub-degree B-mode Polarization in the Cosmic Microwave Background from 100 Square Degrees of SPTpol Data
Ade, P. A. R.; Chiang, H. C.; Hanson, D. +63 more
We present a measurement of the B-mode polarization power spectrum (the BB spectrum) from 100 {{deg}}2 of sky observed with SPTpol, a polarization-sensitive receiver currently installed on the South Pole Telescope. The observations used in this work were taken during 2012 and early 2013 and include data in spectral bands centered at 95 …