%0 Generic %1 kacprzak2014perspective %A Kacprzak, Glenn G. %A Martin, Crystal L. %A Bouché, Nicolas %A Churchill, Christopher W. %A Cooke, Jeff %A LeReun, Audrey %A Schroetter, Ilane %A Ho, Stephanie H. %A Klimek, Elizabeth %D 2014 %K effect galaxy outflows proximity transverse %T New Perspective on Galaxy Outflows From the First Detection of Both Intrinsic and Traverse Metal-Line Absorption %U http://arxiv.org/abs/1407.4126 %X We present the first observation of a galaxy (z=0.2) that exhibits metal-line absorption back-illuminated by the galaxy ("down-the-barrel") and transversely by a background quasar at a projected distance of 58 kpc. Both absorption systems, traced by MgII, are blueshifted relative to the galaxy systemic velocity. The quasar sight-line, which resides almost directly along the projected minor axis of the galaxy, probes MgI and MgII absorption obtained from Keck/LRIS and Lya, SiII and SiIII absorption obtained from HST/COS. For the first time, we combine two independent models used to quantify the outflow properties for down-the-barrel and transverse absorption. We find that the modeled down-the-barrel deprojected outflow velocities range between $V_dtb=45-255$ km/s. The transverse bi-conical outflow model, assuming constant-velocity flows perpendicular to the disk, requires wind velocities $V_outflow=40-80$ km/s to reproduce the transverse MgII absorption kinematics, which is consistent with the range of $V_dtb$. The galaxy has a metallicity, derived from H$\alpha$ and NII, of $O/H=-0.21\pm0.08$, whereas the transverse absorption has $X/H=-1.12\pm0.02$. The galaxy star-formation rate is constrained between $4.6-15$ M$_ødot$/yr while the estimated outflow rate ranges between $1.6-4.2$ M$_ødot$/yr and yields a wind loading factor ranging between $0.1-0.9$. The galaxy and gas metallicities, the galaxy-quasar sight-line geometry, and the down-the-barrel and transverse modeled outflow velocities collectively suggest that the transverse gas originates from ongoing outflowing material from the galaxy. The $\sim$1 dex decrease in metallicity from the base of the outflow to the outer halo suggests metal dilution of the gas by the time it reached 58 kpc.

@misc{kacprzak2014perspective, abstract = {We present the first observation of a galaxy (z=0.2) that exhibits metal-line absorption back-illuminated by the galaxy ("down-the-barrel") and transversely by a background quasar at a projected distance of 58 kpc. Both absorption systems, traced by MgII, are blueshifted relative to the galaxy systemic velocity. The quasar sight-line, which resides almost directly along the projected minor axis of the galaxy, probes MgI and MgII absorption obtained from Keck/LRIS and Lya, SiII and SiIII absorption obtained from HST/COS. For the first time, we combine two independent models used to quantify the outflow properties for down-the-barrel and transverse absorption. We find that the modeled down-the-barrel deprojected outflow velocities range between $V_{dtb}=45-255$ km/s. The transverse bi-conical outflow model, assuming constant-velocity flows perpendicular to the disk, requires wind velocities $V_{outflow}=40-80$ km/s to reproduce the transverse MgII absorption kinematics, which is consistent with the range of $V_{dtb}$. The galaxy has a metallicity, derived from H$\alpha$ and NII, of $[{\rm O/H}]=-0.21\pm0.08$, whereas the transverse absorption has $[{\rm X/H}]=-1.12\pm0.02$. The galaxy star-formation rate is constrained between $4.6-15$ M$_{\odot}$/yr while the estimated outflow rate ranges between $1.6-4.2$ M$_{\odot}$/yr and yields a wind loading factor ranging between $0.1-0.9$. The galaxy and gas metallicities, the galaxy-quasar sight-line geometry, and the down-the-barrel and transverse modeled outflow velocities collectively suggest that the transverse gas originates from ongoing outflowing material from the galaxy. The $\sim$1 dex decrease in metallicity from the base of the outflow to the outer halo suggests metal dilution of the gas by the time it reached 58 kpc.}, added-at = {2014-07-17T09:31:42.000+0200}, author = {Kacprzak, Glenn G. and Martin, Crystal L. and Bouché, Nicolas and Churchill, Christopher W. and Cooke, Jeff and LeReun, Audrey and Schroetter, Ilane and Ho, Stephanie H. and Klimek, Elizabeth}, biburl = {https://www.bibsonomy.org/bibtex/2eca2c42843bc2ebed17257752a99d3b6/miki}, description = {[1407.4126] New Perspective on Galaxy Outflows From the First Detection of Both Intrinsic and Traverse Metal-Line Absorption}, interhash = {6c9a0b1743ee9f45bcbd183313125772}, intrahash = {eca2c42843bc2ebed17257752a99d3b6}, keywords = {effect galaxy outflows proximity transverse}, note = {cite arxiv:1407.4126Comment: 6 pages, 4 figures. Accepted for publication in ApJL}, timestamp = {2014-07-17T09:31:42.000+0200}, title = {New Perspective on Galaxy Outflows From the First Detection of Both Intrinsic and Traverse Metal-Line Absorption}, url = {http://arxiv.org/abs/1407.4126}, year = 2014 }