Sökning: onr:"swepub:oai:DiVA.org:su-156780" >
Ultra-deep Large Bi...
Ultra-deep Large Binocular Camera U-band Imaging of the GOODS-North Field : Depth Versus Resolution
-
Ashcraft, Teresa A. (författare)
-
Windhorst, Rogier A. (författare)
-
Jansen, Rolf A. (författare)
-
visa fler...
-
Cohen, Seth H. (författare)
-
Grazian, Andrea (författare)
-
Paris, Diego (författare)
-
Fontana, Adriano (författare)
-
Giallongo, Emanuele (författare)
-
Speziali, Roberto (författare)
-
Testa, Vincenzo (författare)
-
Boutsia, Konstantina (författare)
-
O'Connell, Robert W. (författare)
-
- Rutkowski, Michael J. (författare)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
-
Ryan, Russell E. (författare)
-
Scarlata, Claudia (författare)
-
Weiner, Benjamin (författare)
-
visa färre...
-
(creator_code:org_t)
- 2018-05-09
- 2018
- Engelska.
-
Ingår i: Publications of the Astronomical Society of the Pacific. - : IOP Publishing. - 0004-6280 .- 1538-3873. ; 130:988
- Relaterad länk:
-
http://arxiv.org/pdf...
-
visa fler...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- We present a study of the trade-off between depth and resolution using a large number of U-band imaging observations in the GOODS-North field from the Large Binocular Camera (LBC) on the Large Binocular Telescope (LBT). Having acquired over 30 hr of data (315 images with 5-6 minutes exposures), we generated multiple image mosaics, starting with the best atmospheric seeing images (FWHM less than or similar to 0 ''.8), which constitute similar to 10% of the total data set. For subsequent mosaics, we added in data with larger seeing values until the final, deepest mosaic included all images with FWHM less than or similar to 1 ''.8 (similar to 94% of the total data set). From the mosaics, we made object catalogs to compare the optimal-resolution, yet shallower image to the lower-resolution but deeper image. We show that the number counts for both images are similar to 90% complete to U-AB less than or similar to 26 mag. Fainter than U-AB similar to 27 mag, the object counts from the optimal-resolution image start to drop-off dramatically (90% between U-AB = 27 and 28 mag), while the deepest image with better surface-brightness sensitivity (mu(AB)(U) less than or similar to 32 mag arcsec(-2)) show a more gradual drop (10% between U-AB similar or equal to 27 and 28 mag). For the brightest galaxies within the GOODS-N field, structure and clumpy features within the galaxies are more prominent in the optimal-resolution image compared to the deeper mosaics. We conclude that for studies of brighter galaxies and features within them, the optimal-resolution image should be used. However, to fully explore and understand the faintest objects, the deeper imaging with lower resolution are also required. Finally, we find-for 220 brighter galaxies with U-AB less than or similar to 23 mag-only marginal differences in total flux between the optimal-resolution and lower-resolution light-profiles to mu(AB)(U) less than or similar to 32 mag arcsec(-2). In only 10% of the cases are the total-flux differences larger than 0.5 mag. This helps constrain how much flux can be missed from galaxy outskirts, which is important for studies of the Extragalactic Background Light.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- diffuse radiation
- galaxies: general
- galaxies: photometry
- methods: data analysis
- techniques: image processing
- techniques: high angular resolution
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Ashcraft, Teresa ...
-
Windhorst, Rogie ...
-
Jansen, Rolf A.
-
Cohen, Seth H.
-
Grazian, Andrea
-
Paris, Diego
-
visa fler...
-
Fontana, Adriano
-
Giallongo, Emanu ...
-
Speziali, Robert ...
-
Testa, Vincenzo
-
Boutsia, Konstan ...
-
O'Connell, Rober ...
-
Rutkowski, Micha ...
-
Ryan, Russell E.
-
Scarlata, Claudi ...
-
Weiner, Benjamin
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Fysik
- Artiklar i publikationen
-
Publications of ...
- Av lärosätet
-
Stockholms universitet