Výsledky vyhledávání

Autor: Filho, ME, Barthel, PD, Ho, LC, Knapen, JH, Beckman, JE, Shlosman, Mahoney, TJ

Publikováno v: CENTRAL KILOPARSEC OF STARBURSTS AND AGN: THE LA PALMA CONNECTION, 703-706
STARTPAGE=703;ENDPAGE=706;TITLE=CENTRAL KILOPARSEC OF STARBURSTS AND AGN: THE LA PALMA CONNECTION

A significant fraction of nearby galaxies contain nuclei with intermediate LINER/H II properties, but the physical nature of these objects remains largely unknown. In order to ascertain the origin of the nuclear activity, we have embarked on a study

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::95c102ce256427639ecf78b1ef9eb3f2
https://research.rug.nl/en/publications/2e3ebed2-5721-4812-87bc-fe5a67019b3f

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The revised Mg-2 index as a metallicity indicator for stellar systems: Giant elliptical galaxies and bulges

Autor: Casuso, E, Vazdekis, A, Peletier, RF, Beckman, JE

Publikováno v: Astrophysical Journal, 458(2), 533-536. IOP PUBLISHING LTD

We provide a new calibration of the metallicity dependence of the Mg-2 index in stellar systems. It is based on new isochrones by the Padova group and the latest stellar spectral libraries. Since the Mg-2 line is one of the strongest absorption lines

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::981606b6897d9cde746fecb8753d2cf6
https://research.rug.nl/en/publications/d0bfb359-c2f3-4817-9493-a8d635f5eb41

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MEASUREMENTS OF DUST EXTINCTION IN HIGHLY INCLINED SPIRAL GALAXIES

Autor: JANSEN, RA, KNAPEN, JH, BECKMAN, JE, PELETIER, RF, HES, R

Publikováno v: Monthly Notices of the Royal Astronomical Society, 270(2), 373-389. Oxford University Press

We study the extinction properties of dust in the well-defined dust lanes of four highly inclined galaxies, using U-, B-, V-, R- and I-band CCD and J- and K'-band near-infrared array images. For three of these galaxies, we could use the symmetry of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::e0a75ba612211681dba6b84b34e9ccdf
https://research.rug.nl/en/publications/ddbb9dde-3e8c-4e6c-aa8e-5de8af47d6a5

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STAR-FORMATION IN THE SPIRAL ARMS OF NGC-4321 .2. H-I DISTRIBUTION AND KINEMATICS

Autor: KNAPEN, JH, CEPA, J, BECKMAN, JE, DELRIO, MS, PEDLAR, A

Publikováno v: Astrophysical Journal, 416(2), 563-&. IOP PUBLISHING LTD

We present H I 21 cm observations of the grand design spiral galaxy NGC 4321, as obtained with the VLA. From our original data, we have obtained data cubes with resolutions ranging from 13'' to 45''. The H I is observed to break up into small condens

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::14dc2c42dbaefc526e8db1e2718a6d77
https://research.rug.nl/en/publications/dd223b83-c9ef-4c02-b582-e24d138176ea

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STATISTICS AND PROPERTIES OF H-II REGIONS IN NGC-6814

Autor: KNAPEN, JH, ARNTHJENSEN, N, CEPA, J, BECKMAN, JE

Publikováno v: The Astronomical Journal, 106(1), 56-65. IOP PUBLISHING LTD

We present a new Halpha image of high quality of the grand-design galaxy NGC 6814, and describe statistical properties of the H II region population. We have determined positions, angular sizes, and calibrated fluxes of 735 individual H II regions. W

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::680926e5307b16466b962a6dda57842d
https://research.rug.nl/en/publications/c03d30c0-75dc-4ac1-8d8d-0d6f50570e37

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STAR FORMATION IN THE SPIRAL ARMS OF NGC-4321 .1. CO OBSERVATIONS

Autor: CEPA, J, BECKMAN, JE, KNAPEN, JH, NAKAI, N, KUNO, N

Publikováno v: The Astronomical Journal, 103(2), 429-&. IOP PUBLISHING LTD

Several positions in the southern spiral arm and the interarm disk of NGC 4321 have been observed in CO (J = 1 --> 0) using the NRO 45 m telescope at Nobeyama, Japan. The analysis shows evidence for streaming motions in the arms, together with an exp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::dd1fada7a2c2fcb2b8336b634e07c539
https://research.rug.nl/en/publications/c0b9e349-ce7d-4d7d-8357-518cf1dcd7fb

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PHASE COHERENT STAR FORMATION PROCESSES IN THE DISKS OF GRAND DESIGN SPIRALS

Autor: BECKMAN, JE, CEPA, J, KNAPEN, JH

Publikováno v: Iau symposia, 89-89
ISSUE=146;STARTPAGE=89;ENDPAGE=89;ISSN=0074-1809;TITLE=Iau symposia

We show examples of a new technique we have devised to compare star formation efficiencies in the arms and discs of spirals. First results show striking evidence of the presence and influence of density wave systems of star formation in grand design

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::aa3f5bf3836afe94d28361c6c3d84803
https://research.rug.nl/en/publications/0f9b6c21-556a-40cd-aee7-49803ced564c

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LARGE-SCALE COHERENT STAR-FORMATION IN NGC 4321

Autor: CEPA, J, BECKMAN, JE, KNAPEN, JH

Publikováno v: Iau symposia, 90-90
ISSUE=146;STARTPAGE=90;ENDPAGE=90;ISSN=0074-1809;TITLE=Iau symposia

We apply a newly devised quantitative technique to infer the relative arm/interarm star formation efficiency ratio in NGC 4321, revealing a complex but clearly defined density wave structure pattern.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::fc55b74962e6b14c8b049a6e1a88345e
https://research.rug.nl/en/publications/e96f752a-6b98-4b6a-9e5b-0fd40a06a24b

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DUST EXTINCTION IN NGC-4594, THE SOMBRERO GALAXY

Autor: KNAPEN, JH, HES, R, BECKMAN, JE, PELETIER, RF

Publikováno v: Astronomy & astrophysics, 241(1), 42-46. EDP Sciences

We have studied the extinction law in the well-defined dust lane of the Sombrero galaxy, NGC4594. In the R,I,J,H, and K bands we find good agreement between values for the extinction ratios A-lambda/A(v) in NGC4594 and those reported for our own Gala

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=narcis______::d003f96e3b02f890633367315e73ef7f
https://research.rug.nl/en/publications/7cb2eabe-aea2-4e04-84d8-b75b5080bcf6

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