Search Publications
Rise of the Titans: A Dusty, Hyper-luminous “870 µm Riser” Galaxy at z ∼ 6
Marques-Chaves, Rui; Oliver, Seb; Cooray, Asantha +12 more
We report the detection of ADFS-27, a dusty, starbursting major merger at a redshift of z = 5.655, using the Atacama Large Millimeter/submillimeter Array (ALMA). ADFS-27 was selected from Herschel/Spectral and Photometric Imaging Receiver (SPIRE) and APEX/LABOCA data as an extremely red “870 µm riser” (I.e., {S}250µ {{m}}<…
Rotation of Late-type Stars in Praesepe with K2
Bouvier, J.; Hebb, L.; Rebull, L. M. +5 more
We have Fourier-analyzed 941 K2 light curves (LCs) of likely members of Praesepe, measuring periods for 86% and increasing the number of rotation periods (P) by nearly a factor of four. The distribution of P versus (V-{K}{{s}}), a mass proxy, has three different regimes: (V-{K}{{s}}) < 1.3, where the rotation rate rapidly …
Mapping the Nuclear Outflow of the Milky Way: Studying the Kinematics and Spatial Extent of the Northern Fermi Bubble
Jenkins, Edward B.; Hernandez, Svea; Savage, Blair D. +7 more
We report new observations from a systematic, spectroscopic, ultraviolet absorption-line survey that maps the spatial and kinematic properties of the high velocity gas in the Galactic Center (GC) region. We examine the hypothesis that this gas traces the biconical nuclear outflow. We use an ultraviolet spectra of 47 background QSOs and halo stars …
Statistical Analysis of Hubble/WFC3 Transit Spectroscopy of Extrasolar Planets
Deming, Drake; Madhusudhan, Nikku; Knutson, Heather +3 more
Transmission spectroscopy provides a window to study exoplanetary atmospheres, but that window is fogged by clouds and hazes. Clouds and haze introduce a degeneracy between the strength of gaseous absorption features and planetary physical parameters such as abundances. One way to break that degeneracy is via statistical studies. We collect all pu…
Black Hole Growth Is Mainly Linked to Host-galaxy Stellar Mass Rather Than Star Formation Rate
Lehmer, B. D.; Alexander, D. M.; Bauer, F. E. +14 more
We investigate the dependence of black hole accretion rate (BHAR) on host-galaxy star formation rate (SFR) and stellar mass (M *) in the CANDELS/GOODS-South field in the redshift range of 0.5≤slant z< 2.0. Our sample consists of ≈ {{18,000}} galaxies, allowing us to probe galaxies with 0.1{M}⊙ {{yr}}-1≲ {SFR}≲ 1…
Distance and Properties of NGC 4993 as the Host Galaxy of the Gravitational-wave Source GW170817
Lee, Chung-Uk; Kim, Seung-Lee; Im, Myungshin +9 more
Recently, the optical counterpart of the gravitational-wave source GW170817 has been identified in the NGC 4993 galaxy. Together with evidence from observations in electromagnetic waves, the event has been suggested as a result of a merger of two neutron stars (NSs). We analyze the multi-wavelength data to characterize the host galaxy property and…
Star Formation at z = 2.481 in the Lensed Galaxy SDSS J1110+6459: Star Formation Down to 30 pc Scales
Rigby, Jane R.; Florian, Michael; Whitaker, Katherine E. +7 more
We present measurements of the surface density of star formation, the star-forming clump luminosity function, and the clump size distribution function, for the lensed galaxy SGAS J111020.0+645950.8 at a redshift of z = 2.481. The physical size scales that we probe, radii r = 30-50 pc, are considerably smaller scales than have yet been studied at t…
Molecular Gas Dominated 50 kpc Ram Pressure Stripped Tail of the Coma Galaxy D100
Yoshida, Michitoshi; Combes, Françoise; Sun, Ming +6 more
We have discovered large amounts of molecular gas, as traced by CO emission, in the ram pressure stripped gas tail of the Coma cluster galaxy D100 (GMP 2910), out to large distances of about 50 kpc. D100 has a 60 kpc long, strikingly narrow tail, which is bright in X-rays and Hα. Our observations with the IRAM 30 m telescope reveal in total ∼ {10}…
GASP. III. JO36: A Case of Multiple Environmental Effects at Play?
Charlot, Stéphane; Fritz, Jacopo; Vulcani, Benedetta +12 more
The so-called jellyfish galaxies are objects exhibiting disturbed morphology, mostly in the form of tails of gas stripped from the main body of the galaxy. Several works have strongly suggested ram pressure stripping to be the mechanism driving this phenomenon. Here, we focus on one of these objects, drawn from a sample of optically selected jelly…
The Extent of Chemically Enriched Gas around Star-forming Dwarf Galaxies
Johnson, Sean D.; Chen, Hsiao-Wen; Mulchaey, John S. +2 more
Supernova driven winds are often invoked to remove chemically enriched gas from dwarf galaxies to match their low observed metallicities. In such shallow potential wells, outflows may produce massive amounts of enriched halo gas (circumgalactic medium, CGM) and pollute the intergalactic medium (IGM). Here, we present a survey of the CGM and IGM ar…