Results 31 to 40 of about 68,770 (231)

A recently quenched galaxy 700 million years after the Big Bang [PDF]

Nature
, Roberto Maiolino, Joris Witstok
exaly   +2 more sources

Outlier Detection in the DESI Bright Galaxy Survey

The Astrophysical Journal Letters, 2023
We present an unsupervised search for outliers in the Bright Galaxy Survey (BGS) data set from the DESI Early Data Release. This analysis utilizes an autoencoder to compress galaxy spectra into a compact, redshift-invariant latent space, and a ...
Yan Liang, Peter Melchior, ChangHoon Hahn, Jeff Shen, Andy Goulding, Charlotte Ward   +5 more
doaj   +1 more source

Counts and Sizes of Galaxies in the Hubble Deep Field - South: Implications for the Next Generation Space Telescope

, 2000
Science objectives for the Next Generation Space Telescope (NGST) include a large component of galaxy surveys, both imaging and spectroscopy. The Hubble Deep Field datasets include the deepest observations ever made in the ultraviolet, optical and near ...
Abraham R. G., Ferguson H. C., Jonathan P. Gardner, Madau P., Scheuer P. A. G., Shobita Satyapal   +5 more
core   +1 more source

The Chandra Multi-Wavelength Project: Optical Spectroscopy and the Broadband Spectral Energy Distributions of X-ray Selected AGN [PDF]

, 2012
From optical spectroscopy of X-ray sources observed as part of ChaMP, we present redshifts and classifications for a total of 1569 Chandra sources from our targeted spectroscopic follow up using the FLWO, SAAO, WIYN, CTIO, KPNO, Magellan, MMT and Gemini ...
Aldcroft, Tom, Barkhouse, Wayne, Cameron, Robert A., Constantin, Anca, Ellison, Sara L., Foltz, Craig, Green, Paul J., Haggard, Daryl, Jannuzi, Buell T., Kim, Dong-Woo, Marshall, Herman L., Mossman, Amy, Perez, Laura M., Romero-Colmenero, Encarni, Ruiz, Angel, Silverman, John D., Smith, Malcolm G., Smith, Paul S., Torres, Guillermo, Trichas, Markos, Wik, Daniel R., Wilkes, Belinda J., Wolfgang, Angie   +22 more
core   +2 more sources

Measuring Outer Disk Warps with Optical Spectroscopy

, 2008
Warps in the outer gaseous disks of galaxies are a ubiquitous phenomenon, but it is unclear what generates them. One theory is that warps are generated internally through spontaneous bending instabilities. Other theories suggest that they result from the
Bland-Hawthorn, Joss, Christlein, Daniel
core   +1 more source

Multiwavelength Observations of the Second Largest Known FR II Radio Galaxy, NVSS 2146+82 [PDF]

, 2000
We present multi-frequency VLA, multicolor CCD imaging, optical spectroscopy, and ROSAT HRI observations of the giant FR II radio galaxy NVSS 2146+82. This galaxy, which was discovered by the NRAO VLA Sky Survey (NVSS), has an angular extent of nearly 20'
Alan H. Bridle, Berkhuijsen E. M., Christopher Palma, Cotter G., Craig L. Sarazin, Fanaroff B. L., Franz E. Bauer, Green P. J., Lacy M., Longair M. S., Miller N. A., Mukai K., Parma P., Prestage R. M., Saripalli L., Steven R. Majewski, Strom R. G., Subrahmanyan R., Taylor D., William D. Cotton, Willis A. G.   +20 more
core   +2 more sources

Beyond BPT: A New Multidimensional Diagnostic Diagram for Classifying Power Sources Tested Using the SAMI Galaxy Survey

The Astrophysical Journal, 2023
Current methods of identifying the ionizing source of nebular emission in galaxies are well defined for the era of single-fiber spectroscopy, but still struggle to differentiate the complex and overlapping ionization sources in some galaxies.
Victor D. Johnston, Anne M. Medling, Brent Groves, Lisa J. Kewley, Luca Cortese, Scott Croom, Ángel R. López-Sánchez, Henry Zovaro, Joss Bland-Hawthorn, Julia Bryant, Jon Lawrence, Matt Owers, Samuel Richards, Jesse van de Sande   +13 more
doaj   +1 more source

PMAS integral field spectroscopy of luminous infrared galaxies. I.- The atlas [PDF]

, 2009
In this paper we present PMAS optical (3800-7200A) IFS of the northern hemisphere portion of a volume-limited sample of 11 LIRGs. The PMAS observations typically cover the central ~5kpc and are complemented with HST/NICMOS images.
A. Alonso-Herrero, A. Labiano, A. Monreal-Ibero, Alonso-Herrero, Alonso-Herrero, Alonso-Herrero, Alonso-Herrero, Armus, Arribas, Arribas, Arribas, Baldwin, Bedregal, Bell, Bingham, Caputi, Chen, Colina, Daigle, Dasyra, Davies, Dopita, Díaz-Santos, Eisenhauer, Elbaz, Falcón-Barroso, Farrah, Förster-Schreiber, García-Marín, García-Marín, Genzel, Genzel, Genzel, Graciá-Carpio, Hattori, Heckman, Heckman, Hinz, J. Alfonso-Garzón, Kauffmann, Keel, Kennicutt, Kewley, Kewley, Kewley, Kim, Kim, L. Colina, Law, LeFevre, Lípari, Lípari, M. García-Marín, Marcillac, Monreal-Ibero, Moustakas, Murphy, Márquez, Márquez, Onken, Papovich, Puech, Pérez-González, Reunanen, Reunanen, Rieke, Roth, Rupke, S. Arribas, Sanders, Sanders, Sanders, Sarzi, Shier, Smith, Soifer, Veilleux, Veilleux, Veilleux, Vogt, Wright, Wu, Yang   +82 more
core   +3 more sources

The Dragonfly Galaxy. III. Jet Brightening of a High-redshift Radio Source Caught in a Violent Merger of Disk Galaxies

The Astrophysical Journal, 2023
The Dragonfly galaxy (MRC 0152-209), the most infrared-luminous radio galaxy at redshift z ∼ 2, is a merger system containing a powerful radio source and large displacements of gas.
Sophie Lebowitz, Bjorn Emonts, Donald M. Terndrup, Joseph N. Burchett, J. Xavier Prochaska, Guillaume Drouart, Montserrat Villar-Martín, Matthew Lehnert, Carlos De Breuck, Joël Vernet, Katherine Alatalo   +10 more
doaj   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source