Resolving the stellar populations in a z=4 lensed galaxy by Bunker, A, Moustakas, L, Davis, M

“…We show that this line emission is most probably powered by star formation in neighboring H II regions and that the z = 4 system is unlikely to be an active galactic nucleus.…”

Serendipitously detected galaxies in the Hubble Deep Field by Dawson, S, Stern, D, Bunker, A, Spinrad, H, Dey, A

“…Finally, we estimate the line-of-sight velocity dispersion and the corresponding mass and expected X-ray luminosity of the galaxy cluster, we present strong arguments for interpreting the Chandra source as an obscured active galactic nucleus, and we discuss in detail the spectrum of one of the candidate z ≳ 5 Lyα emitters.…”

2D kinematics and physical properties of z similar to 3 star-forming galaxies by Lemoine-Busserolle, M, Bunker, A, Lamareille, F, Kissler-Patig, M

“…We discovered that the nearby galaxy, VVDS-020297772 (which shows traces of active galactic nucleus activity), is in fact a companion at a similar redshift with a projected separation of 12 kpc. …”

A small and vigorous black hole in the early Universe by Maiolino, R, Scholtz, J, Witstok, J, Carniani, S, D’Eugenio, F, de Graaff, A, Übler, H, Tacchella, S, Curtis-Lake, E, Arribas, S, Bunker, A, Charlot, S, Chevallard, J, Curti, M, Looser, TJ, Maseda, MV, Rawle, TD, Rodríguez del Pino, B, Willott, CJ, Egami, E, Eisenstein, DJ, Hainline, KN, Robertson, B, Williams, CC, Jones, GC

“…The spectrum also reveals a deep and blueshifted CIVλ1549 absorption trough, tracing an outflow with velocity 800−1,000 km s−1, probably driven by the active galactic nucleus. Assuming local virial relations, we derive a black hole mass of log(MBH/M⊙)=6.2±0.3, accreting at about five times the Eddington rate. …”

A group of galaxies at redshift 2.38 by Francis, P, Woodgate, B, Warren, S, Moller, P, Mazzolini, M, Bunker, A, Lowenthal, J, Williams, T, Minezaki, T, Kobayashi, Y, Yoshii, Y

“…C iv emission is detected, which suggests that a concealed active galactic nucleus is present. The Lyα emission is redshifted by ∼490 km s-1 with respect to the C IV emission, probably because of absorption. …”

THE WFC3 INFRARED SPECTROSCOPIC PARALLEL (WISP) SURVEY by Atek, H, Malkan, M, McCarthy, P, Teplitz, H, Scarlata, C, Siana, B, Henry, A, Colbert, J, Ross, N, Bridge, C, Bunker, A, Dressler, A, Fosbury, R, Martin, C, Shim, H

“…These first fields show high equivalent width sources, active galactic nucleus, and post-starburst galaxies. The median observed star formation rate (SFR) of our Hα-selected sample is 4 M⊙ yr-1. …”

VERY STRONG EMISSION-LINE GALAXIES IN THE WFC3 INFRARED SPECTROSCOPIC PARALLEL SURVEY AND IMPLICATIONS FOR HIGH-REDSHIFT GALAXIES by Atek, H, Siana, B, Scarlata, C, Malkan, M, McCarthy, P, Teplitz, H, Henry, A, Colbert, J, Bridge, C, Bunker, A, Dressler, A, Fosbury, R, Hathi, N, Martin, C, Ross, N, Shim, H

“…After estimating the active galactic nucleus fraction in the sample, we show that the high-EW galaxies have higher sSFR than normal star-forming galaxies at any redshift. …”