Haojing Yan

Galaxy Formation In The Reionization Epoch As Hinted By Wide Field Camera 3 Observations Of The Hubble Ultra Deep Field (2009)

Yan, Haojing, Windhorst, Rogier, Hathi, Nimish, Cohen, Seth, Ryan, Russell, O'Connell, Robert, ...

We present a large sample of candidate galaxies at z ~ 7 -- 10, selected in the Hubble Ultra Deep Field using the new observations of the WFC3 that was recently installed to HST. Our independent...

Red nuggets at z simlar to 1.5: compact passive galaxies and the formation of the Kormendy relation (2009)

Damjanov, Ivana, McCarthy, Patrick J., Abraham, Roberto G., Glazebrook, Karl, Yan, Haojing, Mentuch, Erin, ...

We present the results of Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) imaging of a sample of 19 high-mass passively evolving galaxies with 1.2 < z < 2, taken primarily from the...

A near-infrared excess in the continuum of high-redshift galaxies: a tracer of star and planet formation? (2009)

Mentuch, Erin, Abraham, Roberto G., Glazebrook, Karl, McCarthy, Patrick J., Yan, Haojing, O'Donnell, Daniel V., ...

A broad continuum excess in the near-infrared, peaking in the rest frame at 2-5 micron, is detected in a spectroscopic sample of 88 galaxies at 0.5

Red nuggets at z similar to 1.5: compact passive galaxies and the formation of the Kormendy relation (2009)

Damjanov, Ivana, McCarthy, Patrick J., Abraham, Roberto G., Glazebrook, Karl, Yan, Haojing, Mentuch, Erin, ...

We present the results of Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) imaging of a sample of 19 high-mass passively evolving galaxies with 1.2 < z < 2, taken primarily from the Gemini...

A near-infrared excess in the continuum of high-redshift galaxies: a tracer of star and planet formation? (2009)

Mentuch, Erin, Abraham, Roberto G., Glazebrook, Karl, McCarthy, Patrick J., Yan, Haojing, O'Donnell, Daniel V., ...

A broad continuum excess in the near-infrared, peaking in the rest frame at 2-5 micron, is detected in a spectroscopic sample of 88 galaxies at 0.5

A Surprisingly High Pair Fraction for Extremely Massive Galaxies at z ~ 3 in the GOODS NICMOS Survey (2008)

Bluck, Asa F. L., Conselice, Christopher J., Bouwens, Rychard J., Daddi, Emanuele, Dickinson, Mark, Papovich, Casey, ...

We calculate the major pair fraction and derive the major merger fraction and rate for 82 massive ($M_{*}>10^{11}M_{\odot}$) galaxies at $1.7 < z < 3.0$ utilising deep HST NICMOS data taken in the...

Size evolution of the most massive galaxies at 1.7 (2008)

Buitrago, Fernando, Trujillo, Ignacio, Conselice, Christopher J., Bouwens, Rychard J., Dickinson, Mark, Yan, Haojing

We measure the sizes of 82 massive (M>10^11 M_sun) galaxies at 1.72 our results are compatible with both a leveling off, or a mild evolution in size. Furthermore, the high density (~2x10^10 M_sun...

Red Nuggets at z~1.5: Compact passive galaxies and the formation of the Kormendy Relation (2008)

Damjanov, Ivana, McCarthy, Patrick J., Abraham, Roberto G., Glazebrook, Karl, Yan, Haojing, Mentuch, Erin, ...

We present the results of NICMOS imaging of a sample of 16 high mass passively evolving galaxies with 1.32, this is the first time such systems have been detected in a rest-frame optical survey at 1.3

An Overdensity of i-dropouts Among A Population of Excess Field Objects in the Virgo Cluster (2007)

Yan, Haojing, Hathi, Nimish, Windhorst, Rogier

Using a set of deep imaging data obtained by the ACS on the HST shortly after its deployment, Yan, Windhorst & Cohen (2003) found a large number of F775W-band dropouts (i-dropouts), which are...

Deep Wide-Field Spectrophotometry of the Open Cluster M67 (2007)

Xiaohui Fan, David Burstein, Jian-sheng Chen, Jin Zhu, Zhaoji Jiang, Hong Wu, ...

We present nine color CCD intermediate-band spectrophotometry of a two square degree field centered on the old open cluster M67, from 3890 A to nearly 1¯. These observations are taken as a part of...

A compact cluster of massive red galaxies at a redshift of 1.5 (2007)

McCarthy, Patrick J., Yan, Haojing, Abraham, Roberto G., Mentuch, Erin, Glazebrook, Karl, Yan, Lin, ...

We describe a compact cluster or group of massive red galaxies at z = 1.5 discovered in one of the Gemini Deep Deep Survey (GDDS) fields. Deep H-band imaging from the Hubble Space Telescope (HST)...

Redshifts of Emission-Line Objects in the Hubble Ultra Deep Field (2007)

Xu, Chun, Pirzkal, Norbert, Malhotra, Sangeeta, Rhoads, James E., Mobasher, Bahram, Daddi, Emanuele, ...

We present redshifts for 115 emission-line objects in the Hubble Ultra Deep Field identified through the Grism ACS Program for Extragalactic Science (GRAPES) project using the slitless grism...

Redshifts of Emission Line Objects in the Hubble Ultra Deep Field (2007)

Xu, Chun, Pirzkal, Norbert, Malhotra, Sangeeta, Rhoads, James E., Mobasher, Bahram, Daddi, Emanuele, ...

We present redshifts for 115 emission line objects in the Hubble Ultra Deep Field (HUDF) identified through the GRism ACS Program for Extragalactic Science (GRAPES) project using the slitless grism...

The Gemini Deep Deep Survey: VIII. When Did Early-type Galaxies Form? (2007)

Abraham, Roberto G., Nair, Preethi, McCarthy, Patrick J., Glazebrook, Karl, Mentuch, Erin, Yan, Haojing, ...

We have used the Hubble Space Telescope's Advanced Camera for Surveys (Ford et al. 2003) to measure the cumulative mass density in morphologically-selected early-type galaxies over the redshift range...

Redshifts of emission-line objects in the Hubble Ultra Deep Field (2007)

Xu, Chun, Pirzkal, Norbert, Malhotra, Sangeeta, Rhoads, James E., Mobasher, Bahram, Daddi, Emanuele, ...

We present redshifts for 115 emission-line objects in the Hubble Ultra Deep Field identified through the Grism ACS Program for Extragalactic Science (GRAPES) project using the slitless grism...

The Gemini Deep Deep Survey VIII : when did early-type galaxies form? (2007)

Abraham, Roberto G., Nair, Preethi, McCarthy, Patrick J., Glazebrook, Karl, Mentuch, Erin, Yan, Haojing, ...

We have used the Hubble Space Telescope's Advanced Camera for Surveys (Ford et al. 2003) to measure the cumulative mass density in morphologically selected early-type galaxies over the redshift range...

A compact cluster of massive red galaxies at a redshift of 1.5 (2007)

McCarthy, Patrick J., Yan, Haojing, Abraham, Roberto G., Mentuch, Erin, Glazebrook, Karl, Yan, Lin, ...

We describe a compact cluster or group of massive red galaxies at z = 1.5 discovered in one of the Gemini Deep Deep Survey (GDDS) fields. Deep H-band imaging from the Hubble Space Telescope (HST)...

The Gemini Deep Deep Survey VIII : when did early-type galaxies form? (2007)

Abraham, Roberto G., Nair, Preethi, McCarthy, Patrick J., Glazebrook, Karl, Mentuch, Erin, Yan, Haojing, ...

We have used the Hubble Space Telescope's Advanced Camera for Surveys (Ford et al. 2003) to measure the cumulative mass density in morphologically selected early-type galaxies over the redshift range...

A compact cluster of massive red galaxies at a redshift of 1.5 (2007)

McCarthy, Patrick J., Yan, Haojing, Abraham, Roberto G., Mentuch, Erin, Glazebrook, Karl, Yan, Lin, ...

We describe a compact cluster or group of massive red galaxies at z = 1.5 discovered in one of the Gemini Deep Deep Survey (GDDS) fields. Deep H-band imaging from the Hubble Space Telescope (HST)...

The Gemini Deep Deep Survey VIII : when did early-type galaxies form? (2007)

Abraham, Roberto G., Nair, Preethi, McCarthy, Patrick J., Glazebrook, Karl, Mentuch, Erin, Yan, Haojing, ...

We have used the Hubble Space Telescope's Advanced Camera for Surveys (Ford et al. 2003) to measure the cumulative mass density in morphologically selected early-type galaxies over the redshift range...

A compact cluster of massive red galaxies at a redshift of 1.5 (2007)

McCarthy, Patrick J., Yan, Haojing, Abraham, Roberto G., Mentuch, Erin, Glazebrook, Karl, Yan, Lin, ...

We describe a compact cluster or group of massive red galaxies at z = 1.5 discovered in one of the Gemini Deep Deep Survey (GDDS) fields. Deep H-band imaging from the Hubble Space Telescope (HST)...

A compact cluster of massive red galaxies at a redshift of 1.5 (2007)

McCarthy, Patrick J., Yan, Haojing, Abraham, Roberto G., Mentuch, Erin, Glazebrook, Karl, Yan, Lin, ...

We describe a compact cluster or group of massive red galaxies at z = 1.5 discovered in one of the Gemini Deep Deep Survey (GDDS) fields. Deep H-band imaging from the Hubble Space Telescope (HST)...

The Gemini Deep Deep Survey VIII : when did early-type galaxies form? (2007)

Abraham, Roberto G., Nair, Preethi, McCarthy, Patrick J., Glazebrook, Karl, Mentuch, Erin, Yan, Haojing, ...

We have used the Hubble Space Telescope's Advanced Camera for Surveys (Ford et al. 2003) to measure the cumulative mass density in morphologically selected early-type galaxies over the redshift range...

The Stellar Masses and Star Formation Histories of Galaxies at z ~ 6: Constraints from Spitzer Observations in the Great Observatories Origins Deep Survey (2006)

Yan, Haojing, Dickinson, Mark, Giavalisco, Mauro, Stern, Daniel, Eisenhardt, Peter R. M., Ferguson, Henry C.

Using the deep Spitzer IRAC observations of the Great Observatories Origins Deep Survey (GOODS), we study the stellar masses and star formation histories of galaxies at z ~ 6. Our study is based on...

Rest-frame Ultraviolet-to-Optical Properties of Galaxies at z ~ 6 and 5 in the Hubble Ultra Deep Field: from Hubble to Spitzer (2005)

Yan, Haojing, Dickinson, Mark, Stern, Daniel, Eisenhardt, Peter R. M., Chary, Ranga-Ram, Giavalisco, Mauro, ...

We use data from the first epoch of observations with the IRAC/Spitzer for the GOODS to detect and study a collection of LBGs at z ~ 6 to 5 in the HUDF, six of which have spectroscopic confirmation....

High-Redshift Extremely Red Objects in the HST Ultra Deep Field Revealed by the GOODS IRAC Observations (2004)

Yan, Haojing, Dickinson, Mark, Eisenhardt, Peter R. M., Ferguson, Henry C., Grogin, Norman A., Paolillo, Maurizio, ...

Using early data from the Infrared Array Camera (IRAC) on the Spitzer Space Telescope, taken for the Great Observatories Origins Deep Survey (GOODS), we identify and study objects that are...

A Redshift z=5.4 Lyman alpha Emitting Galaxy with Linear Morphology in the GRAPES/UDF Field (2004)

Rhoads, James E., Panagia, Nino, Windhorst, Rogier A., Malhotra, Sangeeta, Pirzkal, Norbert, Xu, Chun, ...

We have discovered an extended Lyman alpha plume associated with a compact source at redshift 5.4 in slitless spectroscopic data from the Grism ACS Program for Extragalactic Science (GRAPES) project....

Candidates of z ~ 5.5--7 Galaxies in the HST Ultra Deep Field (2004)

Yan, Haojing, Windhorst, Rogier A.

We report results from our $z\simeq 5.5$--7 galaxy search in the HST Ultra Deep Field (UDF). Using the 400-orbit of ACS data, we found 108 plausible $5.5\leq z\leq 6.5$ (or $z\simeq 6$ for short)...

The Major Sources of the Cosmic Reionizing Background at z ~ 6 (2003)

Yan, Haojing, Windhorst, Rogier A.

In this paper, we address which sources contributed most of the reionizing photons. Our argument assumes that the reionization ended around z ~ 6 and that it was a relatively quick process, i.e.,...

Searching for z ~ 6 Objects with the HST Advanced Camera for Surveys: Preliminary Analysis of a Deep Parallel Field (2002)

Yan, Haojing, Windhorst, Rogier A., Cohen, Seth H.

Recent results suggest that z ~ 6 marks the end of the reionization era. A large sample of objects at z ~ 6, therefore, will be of enormous importance, as it will enable us to observationally...

The Infrared Counterparts of the Optically Unidentified CDF-S 1Ms Sources (2002)

Yan, Haojing, Windhorst, Rogier A., Rottgering, Huub J. A., Cohen, Seth H., Odewahn, Stephen C., Chapman, Scott C., ...

The Chandra Deep Field South (CDF-S) 1Ms exposure produced a catalog of 346 X-ray sources, of which 59 were not visible on the VLT/FORS1 and the ESO-MPI/WFI deep R-band images to a limit of...

A Simple Prediction on the Surface Density of Galaxies at z ~ 6 (2002)

Yan, Haojing, Windhorst, Rogier A., Odewahn, Stephen C., Cohen, Seth H., Rottgering, Huub J. A., Keel, William C.

Systematic surveys are being proposed to discover a significant number of galaxies at z ~ 6, which is now suggested as the epoch when the reionization era of the Universe ends. To plan such surveys,...

Ring structure and warp of NGC5907 -- Interaction with dwarf galaxies (1998)

Shang, Zhaohui, Zheng, Zhongyuan, Brinks, Elias, Chen, Jiansheng, Burstein, David, Su, Hongjun, ...

The edge-on, nearby spiral galaxy NGC5907 has long been used as the prototype of a ``non-interacting'' warped galaxy. We report here the discovery of two interactions with companion dwarf galaxies...

Deep Wide-Field Spectrophotometry of the Open Cluster M67 (1996)

Fan, Xiaohui, Burstein, David, Chen, Jian-sheng, Zhu, Jin, Jiang, Zhaoji, Wu, Hong, ...

We present nine color CCD intermediate-band spectrophotometry of a two square degree field centered on the old open cluster M67, from 3890$\rm \AA$ to nearly 1$\mu$. These observations are taken as a...