Výsledky vyhledávání - "M. W. Pakull"

Neutral gas heating by X-rays in primitive galaxies: Infrared observations of the blue compact dwarf I Zw 18 with Herschel

Autor: Diane Cormier, D. Pequignot, Suzanne C. Madden, M.-Y. Lee, Sara R. Heap, Vianney Lebouteiller, M. W. Pakull, D. Kunth, Mélanie Chevance, F. L. Polles, Frédéric Galliano

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 602, pp.A45. ⟨10.1051/0004-6361/201629675⟩
Astron.Astrophys.
Astron.Astrophys., 2017, 602, pp.A45. ⟨10.1051/0004-6361/201629675⟩
Astron.Astrophys., 2017, 602, pp.A45. 〈10.1051/0004-6361/201629675〉
Astronomy and Astrophysics-A&A, 2017, 602, pp.A45. ⟨10.1051/0004-6361/201629675⟩

Context. The neutral interstellar medium of galaxies acts as a reservoir to fuel star formation. The dominant heating and cooling mechanisms in this phase are uncertain in extremely metal-poor star-forming galaxies. The low dust-to-gas mass ratio and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0534e0e849e49f9afa6f8ca54cf8c33e
https://hal.archives-ouvertes.fr/hal-01554830/file/aa29675-16.pdf

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The supergiant optical counterpart of ULX P13 in NGC 7793

Autor: C. Motch, Roberto Soria, F. Grise, M. W. Pakull

Publikováno v: Astronomische Nachrichten. 332:367-370

We have identified the optical counterpart of the ULX source P13 in the nearby spiral galaxy NGC 7793. The object is a V ~ 20.5 mag star, ten times brighter than any other established counterpart of a ULX in nearby galaxies. Medium resolution optical

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3d4a24031c9ab3c0dd7785f8c2e6d92b
https://doi.org/10.1002/asna.201011501

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A ULX in NGC 4559: A 'Mini-Cartwheel' Scenario?

Autor: R. Soria, M. S. Cropper, M. W. Pakull

Publikováno v: International Astronomical Union Colloquium. 194:57-59

We have studied the peculiar environment around a ULX in NGC 4559 (with Lx ≈ 2 x 1040 erg s–1 and MBH ≳ 50M⊙). The X-ray source is located near the rim of a young (age < 30 Myr), large (diameter ≈ 700 pc) ring-like star forming complex poss

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5868bd90efaa4af524b42d67976a41e7
https://doi.org/10.1017/s0252921100151905

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Non-LTE analysis of a new pulsating PG 1159-type central star detected in the ROSAT XRT all sky survey

Autor: M. W. Pakull, Christian Motch, K. Werner

Publikováno v: Advances in Space Research. 13:399-402

We summarize the analysis of a new PG 1159 star, i.e., a hydrogen deficient pre-white dwarf detected in the ROSAT XRT all sky survey /1/. The X-ray source RX J2117.1+3412 is relatively faint (≈0.33 cnt s−1) and was selected for optical identifica

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0028b14cce16cd36ac0be910c361e27a
https://doi.org/10.1016/0273-1177(93)90148-5

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The X-ray source content of the XMM-Newton Galactic plane survey

Autor: Ignacio Negueruela, Natalie A. Webb, Mark Cropper, Christian Motch, Francisco J. Carrera, Simon Rosen, F. X. Pineau, R. S. Warwick, Jonathan Tedds, Axel Schwope, M. W. Pakull, Patrick Guillout, M. G. Watson

Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
instname
Astronomy and Astrophysics, 2010, 523, A92

We report the results of an optical campaign carried out by the XMM-Newton Survey Science Centre with the specific goal of identifying the brightest X-ray sources in the XMM-Newton Galactic plane survey. In addition to photometric and spectroscopic o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acac3785b4a139fcdb3b5c144668344b
http://hdl.handle.net/10261/46856

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Optical light curve and binary period of the supersoft X-ray transient RX J0513.9-6951

Autor: C. Motch, M. W. Pakull

Publikováno v: Lecture Notes in Physics ISBN: 9783540613909

The orbital period is a key parameter for our understanding of the dynamics and of the evolutionary status of contact binary systems. Steady-state hydrogen burning on the surface of a white dwarf requires accretion rates of few 10 -7 Mo/yr which for

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f63ef4224b9d75b23037999d0bf01f79
https://doi.org/10.1007/bfb0102255

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The proper motion of the isolated neutron star RX J1605.3+3249

Autor: Axel Schwope, Christian Motch, M. W. Pakull, Frank Haberl, V. E. Zavlin, Kazuhiro Sekiguchi

We obtained deep optical imaging of the thermally emitting X-ray bright and radio-quiet isolated neutron star RX J1605.3+3249 with the Subaru telescope in 1999 and 2003. Together with archival HST images acquired in 2001 these data reveal a proper mo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d620a25e86df741317496269228da41e
http://arxiv.org/abs/astro-ph/0408356

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Non-LTE model atmosphere analysis of the supersoft X-ray source RX J0122.9-7521

Autor: Anne P. Cowley, David Crampton, M. W. Pakull, K. Werner, J. B. Hutchings, B. Wolff, P. C. Schmidtke

Publikováno v: Lecture Notes in Physics ISBN: 9783540613909

The supersoft X-ray source RX J0122.9-7521 was discovered in the ROSAT all-sky survey and suspected to be a member of the Small Magellanic Cloud (Kahabka et al. 1994). More recently the source has been optically identified with an extremely hot PG 11

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0f40ebf73ff6c04933f853f8a5341e78
https://doi.org/10.1007/bfb0102256

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