Planetary Nebulae in Face-On Spiral Galaxies. III. Planetary Nebula Kinematics and Disk Mass (2009)
Herrmann, Kimberly A., Ciardullo, Robin
Much of our understanding of dark matter halos comes from the assumption that the mass-to-light ratio (M/L) of spiral disks is constant. The best way to test this hypothesis is to measure the disk...
The Planetary Nebula Luminosity Function: Pieces of the Puzzle (2009)
Extragalactic surveys in the emission line of [O III] 5007 have provided us with the absolute line strengths of large, homogeneous sets of planetary nebulae. These data have been used to address a...
Benedict, G. Fritz, McArthur, Barbara E., Napiwotzki, Ralf, Harrison, Thomas E., Harris, Hugh C., Nelan, Edmund, ...
We present absolute parallaxes and relative proper motions for the central stars of the planetary nebulae NGC 6853 (The Dumbbell), NGC 7293 (The Helix), Abell 31, and DeHt 5. This paper details our...
Planetary Nebulae in Face-On Spiral Galaxies. II. Planetary Nebula Spectroscopy (2009)
Herrmann, Kimberly A., Ciardullo, Robin
As the second step in our investigation of the mass-to-light ratio of spiral disks, we present the results of a spectroscopic survey of planetary nebulae (PNe) in five nearby, low-inclination...
The edge of the M87 halo and the kinematics of the diffuse light in the Virgo cluster core (2009)
Doherty, Michelle, Arnaboldi, Magda, Das, Payel, Gerhard, Ortwin, Aguerri, J. Alfonso L., Ciardullo, Robin, ...
We present high resolution FLAMES/VLT spectroscopy of intracluster planetary nebula (ICPN) candidates, targeting three new fields in the Virgo cluster core with surface brightness down to mu_B =...
Structure and Substructure of Galactic Spheroids (2009)
Romanowsky, Aaron J., Brodie, Jean P., Bullock, James S., Ciardullo, Robin, Guhathakurta, Puraga, Hoffman, Loren, ...
The full spatio-chemo-dynamical structure of galaxies of all types and environments at low redshift provides a critical accompaniment to observations of galaxy formation at high redshift. The next...
Kinematic Evidence for Halo Substructure in Spiral Galaxies (2009)
Herrmann, Kimberly A., Ciardullo, Robin, Sigurdsson, Steinn
We present the results of a kinematic study of planetary nebulae in the extreme outskirts of two spiral galaxies, M83 (NGC 5236) and M94 (NGC 4736). We find that in the inner regions of the galaxies,...
Zepf, Stephen E., Stern, Daniel, Maccarone, Thomas J., Kundu, Arunav, Kamionkowski, Marc, Rhode, Katherine L., ...
We present Keck LRIS spectroscopy of the black hole–hosting globular cluster RZ 2109 in the Virgo elliptical galaxy NGC 4472. We find that this object has extraordinarily broad [O III] λ5007 and...
Zepf, Stephen E., Stern, Daniel, Maccarone, Thomas J., Kundu, Arunav, Kamionkowski, Marc, Rhode, Katherine L., ...
We present Keck LRIS spectroscopy of the black hole-hosting globular cluster RZ2109 in the Virgo elliptical galaxy NGC 4472. We find that this object has extraordinarily broad [OIII]5007 and...
Planetary Nebulae in Face-On Spiral Galaxies. I. Planetary Nebula Photometry and Distances (2008)
Herrmann, Kimberly A., Ciardullo, Robin, Feldmeier, John J., Vinciguerra, Matt
As the first step to determine disk mass-to-light ratios for normal spiral galaxies, we present the results of an imaging survey for planetary nebulae (PNe) in six nearby, face-on systems: IC 342,...
Expansion velocities and core masses of bright planetary nebulae in the Virgo cluster (2008)
Arnaboldi, Magda, Doherty, Michelle, Gerhard, Ortwin, Ciardullo, Robin, Aguerri, J. Alfonso, Feldmeier, John J., ...
The line-of-sight velocities and [OIII] 5007 AA expansion velocities are measured for 11 planetary nebulae (PNs) in the Virgo cluster core, at 15 Mpc distance, with the FLAMES spectrograph on the ESO...
Expansion velocities and core masses of bright planetary nebulae in the Virgo Cluster (2008)
Arnaboldi, Magda, Doherty, Michelle, Gerhard, Ortwin, Ciardullo, Robin, Aguerri, J. Alfonso L., Feldmeier, John J., ...
Hill, Gary J., Gebhardt, Karl, Komatsu, Eiichiro, Drory, Niv, MacQueen, Phillip J., Adams, Josh, ...
Spitzer Constraints on the Stellar Populations of Lyman-Alpha Emitting Galaxies at z = 3.1 (2007)
Lai, Kamson, Huang, Jia-Sheng, Fazio, Giovanni, Gawiser, Eric, Ciardullo, Robin, Damen, Maaike, ...
We investigate the stellar populations of a sample of 162 Lyman-alpha emitting galaxies (LAEs) at z = 3.1 in the Extended Chandra Deep Field South, using deep Spitzer IRAC data available from the...
Ly Alpha-Emitting Galaxies at z=3.1: L* Progenitors Experiencing Rapid Star Formation (2007)
Gawiser, Eric, Francke, Harold, Lai, Kamson, Schawinski, Kevin, Gronwall, Caryl, Ciardullo, Robin, ...
We studied the clustering properties and multiwavelength spectral energy distributions of a complete sample of 162 Ly Alpha-Emitting (LAE) galaxies at z=3.1 discovered in deep narrow-band MUSYC...
Virgo's intracluster globular clusters as seen by the advanced camera for surveys (2007)
Williams, Benjamin F., Ciardullo, Robin, Durrell, Patrick R., Feldmeier, John J., Sigurdsson, Steinn, Vinciguerra, Matt, ...
The metallicity distribution of intracluster stars in Virgo (2007)
Williams, Benjamin F., Ciardullo, Robin, Durrell, Patrick R., Vinciguerra, Matt, Feldmeier, John J., Jacoby, George H., ...
The resolved stellar populations of a dwarf spheroidal galaxy in the Virgo cluster (2007)
Durrell, Patrick R., Williams, Benjamin F., Ciardullo, Robin, Feldmeier, John J., Von Hippel, Ted, Sigurdsson, Steinn, ...
The Resolved Stellar Populations of a Dwarf Spheroidal Galaxy in the Virgo Cluster (2006)
Durrell, Patrick R., Williams, Benjamin F., Ciardullo, Robin, Feldmeier, John J., Von Hippel, Ted, Sigurdsson, Steinn, ...
We report on the discovery of a faint (M_V ~ -10.6 +/- 0.2) dwarf spheroidal galaxy on deep F606W and F814W Hubble Space Telescope images of a Virgo intracluster field. The galaxy is easily resolved...
The Metallicity Distribution of Intracluster Stars in Virgo (2006)
Williams, Benjamin F., Ciardullo, Robin, Durrell, Patrick R., Vinciguerra, Matt, Feldmeier, John J., Jacoby, George H., ...
We have used the Hubble Space Telescope's Advanced Camera for Surveys (ACS) to detect and measure ~5300 stars in a single intracluster field in the Virgo Cluster. By performing F606W and F814W...
Virgo's Intracluster Globular Clusters as Seen by the Advanced Camera for Surveys (2006)
Williams, Benjamin F., Ciardullo, Robin, Durrell, Patrick R., Feldmeier, John J., Sigurdsson, Steinn, Vinciguerra, Matt, ...
We report the discovery of 4 candidate intracluster globular clusters (IGCs) in a single deep HST ACS field of the Virgo Cluster. We show that each cluster is roughly spherical, has a magnitude near...
Planetary Nebulae as Probes of Stellar Populations (2006)
Planetary nebulae (PNe) have the potential to revolutionize our understanding of extragalactic stellar populations. Indeed, in many systems, bright PNe are the only individual objects identifiable...
The physical nature of Ly alpha-emitting galaxies at z=3.1 (2006)
Gawiser, Eric, Dokkum, Pieter G. Van, Gronwall, Caryl, Ciardullo, Robin, Blanc, Guillermo A., Castander, Francisco J., ...
We selected 40 candidate Ly alpha-emitting galaxies ( LAEs) at z similar or equal to 3.1 with observed-frame equivalent widths greater than 150 and inferred emission-line fluxes above 2.5 x 10(-17)...
The Physical Nature of Lyman Alpha Emitting Galaxies at z=3.1 (2006)
Gawiser, Eric, Van Dokkum, Pieter G., Gronwall, Caryl, Ciardullo, Robin, Blanc, Guillermo A., Castander, Francisco J., ...
We selected 40 candidate Lyman Alpha Emitting galaxies (LAEs) at z ~=3.1 with observed frame equivalent widths >150A and inferred emission line fluxes >2.5x10^-17 ergs/cm^2/s from deep narrow-band...
Hypervelocity intracluster stars ejected by supermassive black hole binaries (2005)
Holley-Bockelmann, Kelly, Sigurdsson, Steinn, Mihos, J. Christopher, Feldmeier, John J., Ciardullo, Robin, McBride, Cameron
Hypervelocity stars have been recently discovered in the outskirts of galaxies, such as the unbound star in the Milky Way halo, or the three anomalously fast intracluster planetary nebulae (ICPNe) in...
Herrmann, Kimberly A., Ciardullo, Robin
When astronomers study the dark matter halos of spiral galaxies, they normally assume that the disk mass-to-light ratio is *constant*. We describe a method of analyzing the kinematics of planetary...
Close Binaries as the Progenitors of the Brightest Planetary Nebulae (2005)
Ciardullo, Robin, Sigurdsson, Steinn, Feldmeier, John J., Jacoby, George H.
We investigate the possible progenitors of the planetary nebulae (PNs) which populate the top 0.5 mag of the [O III] 5007 planetary nebula luminosity function (PNLF). We show that the absolute...
The Planetary Nebula Luminosity Function (2004)
The [O III] 5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder: it is the only standard candle that can be applied to all the large...
Feldmeier, John, Ciardullo, Robin, Jacoby, George, Durrell, Patrick
Intracluster planetary nebulae are a useful tracer of the evolution of galaxies and galaxy clusters. We analyze our catalog of 318 intracluster planetary nebulae candidates found in 0.89 square...
The Planetary Nebula System of M33 (2004)
Ciardullo, Robin, Durrell, Patrick R., Laychak, Mary Beth, Herrmann, Kimberly A., Moody, Kenneth, Jacoby, George H., ...
We report the results of a photometric and spectroscopic survey for planetary nebulae (PNe) in the Local Group spiral galaxy M33. We use our sample of 152 PNe to derive an [O III] planetary nebula...
A CFH12K Survey of Red Giant Stars in the M81 Group (2003)
Durrell, Patrick R., DeCesar, Megan E., Ciardullo, Robin, Hurley-Keller, Denise, Feldmeier, John J.
We present the preliminary results of a wide-field photometric survey of individual red giant branch (RGB) and asymptotic giant branch (AGB) stars in the M81 group, performed with the CFH12K mosaic...
Distances from Planetary Nebulae (2003)
The [O III] 5007 planetary nebula luminosity function (PNLF) occupies an important place on the extragalactic distance ladder. Since it is the only method that is applicable to all the large galaxies...
Kinematics of Planetary Nebulae in M51's Tidal Debris (2002)
Durrell, Patrick R., Mihos, J. Christopher, Feldmeier, John J., Jacoby, George H., Ciardullo, Robin
We report the results of a radial velocity survey of planetary nebulae (PNe) located in the tidal features of the well-known interacting system NGC 5194/95 (M51). We find clear kinematic evidence...
Ciardullo, Robin, Feldmeier, John J., Jacoby, George H., De Naray, Rachel Kuzio, Laychak, Mary Beth, Durrell, Patrick R.
We report the results of [OIII] lambda 5007 surveys for planetary nebulae (PNe) in NGC 2403, 3115, 3351, 3627, 4258, and 5866. Using on-band/off-band [OIII] and H-alpha images, we identify samples of...
Intracluster Red Giant Stars in the Virgo Cluster (2002)
Durrell, Patrick R., Ciardullo, Robin, Feldmeier, John J., Jacoby, George H., Sigurdsson, Steinn
We have used the WFPC2 camera of the Hubble Space Telescope to obtain deep F814W images of a blank field in the Virgo Cluster located 41 arcmin northwest of M87. We perform star counts in that field,...
A Search for Intra-group Planetary Nebulae in the M 81 Group (2001)
Feldmeier, John J., Durrell, Patrick R., Ciardullo, Robin, Jacoby, George H.
We present the initial results from an [O III] lambda 5007 survey for intra-group planetary nebulae in the M 81 group of galaxies. A total of 0.36 square degrees of the survey have been analyzed thus...
Kinematics of Planetary Nebulae in M 51's Tidal Tail (2001)
Feldmeier, John, Mihos, Chris, Durrell, Patrick, Ciardullo, Robin, Jacoby, George
The galaxy pair NGC 5194/95 (M 51) is one of the closest and best known interacting systems. Despite its notoriety, however, many of its features are not well studied. Extending westward from NGC...
Ciardullo, Robin, Feldmeier, John, Krelove, Kara, Jacoby, George, Gronwall, Caryl
We present two pieces of evidence supporting the hypothesis that the bright [OIII] lambda 5007 sources found in Virgo's intracluster space are intracluster planetary nebulae, rather than [OII] lambda...
A Critical Examination of Hypernova Remnant Candidates in M101. I. MF83 (2000)
Lai, Shih-Ping, Chu, You-Hua, Chen, C. H. Rosie, Ciardullo, Robin, Grebel, Eva K.
The SNR candidate MF83 in M101 is coincident with a very luminous X-ray source. Based on the high X-ray luminosity, it has been suggested that MF83 is a "hypernova remnant" requiring an explosion...
Biases in Expansion Distances of Novae Arising from the Prolate Geometry of Nova Shells (2000)
Wade, Richard A., Harlow, Jason J. B., Ciardullo, Robin
(abridged) Expansion distances (or expansion parallaxes) for classical novae are based on comparing a measurement of the shell expansion velocity, multiplied by the time since outburst, with some...
A Hubble Space Telescope Survey for Resolved Companions of Planetary-Nebula Nuclei (1999)
Ciardullo, Robin, Bond, Howard E., Sipior, Michael S., Fullton, Laura K., Schaefer, Karen G.
We report results of an HST "snapshot" survey aimed at finding resolved binary companions of the central stars of Galactic planetary nebulae (PNe). Using WF/PC and WFPC2, we searched the fields of...
Chemical Abundances of Planetary Nebulae in the Bulge and Disk of M31 (1998)
Jacoby, George H., Ciardullo, Robin
We derive abundances and central star parameters for 15 planetary nebulae (PNe) in M31: 12 in the bulge and 3 in a disk field 14 kpc from the nucleus. No single abundance value characterizes the...
The Circumstellar Extinction of Planetary Nebulae (1998)
Ciardullo, Robin, Jacoby, George H.
We analyze the dependence of circumstellar extinction on core mass for the brightest planetary nebulae (PNe) in the Magellanic Clouds and M31. We show that in all three galaxies, a statistically...
Intracluster Planetary Nebulae in the Virgo Cluster I. Initial Results (1998)
Feldmeier, John, Ciardullo, Robin, Jacoby, George
We report the initial results of a survey for intracluster planetary nebulae in the Virgo Cluster. In two 16' x 16' fields, we identify 69 and 16 intracluster planetary nebula candidates,...
Intracluster Stars and the Galactic Halos of Virgo (1997)
Feldmeier, John J., Ciardullo, Robin, Bartlett, Roger, Jacoby, George H.
Planetary nebulae can be useful dynamical probes of elliptical galaxy halos, but progress thus far has been hampered by the small data samples available for study. In order to obtain a large sample...
The Planetary Nebula Luminosity Function of M87 and the Intracluster Stars of Virgo (1997)
Ciardullo, Robin, Jacoby, George, Feldmeier, John, Bartlett, Roger
We present the results of a wide-field [O III] $\lambda 5007$ survey for planetary nebulae (PN) in M87 and its surrounding halo. We show that the planetary nebula luminosity function (PNLF) of M87's...
Planetary Nebulae as standard candles XI. Application to Spiral Galaxies (1996)
Feldmeier, John, Ciardullo, Robin, Jacoby, George
We report the results of an [O III] lambda 5007 survey for planetary nebulae (PN) in three spiral galaxies: M101 (NGC 5457), M51 (NGC 5194/5195) and M96 (NGC 3368). By comparing on-band/off-band [O...