David H. Cohen

Helium-like X-ray line complexes show that the hottest plasma on the O supergiant ζ Puppis is in its wind

#1

et al.

(Mar 29, 2022)

Published in:
- Mon.Not.Roy.Astron.Soc. 513 (2022) 2, 1609-1622
•
e-Print:
- 2203.15918 [astro-ph.SR]

Chandra grating spectroscopy of embedded wind shock X-ray emission from O stars shows low plasma temperatures and significant wind absorption

#2

David H. Cohen
,
David H. Cohen
(
- Swarthmore Coll.
)
,
Winter Parts
,
Winter Parts
(
- Swarthmore Coll.
)
,
Graham M. Doskoch
(
- Swarthmore Coll.
)

et al.

(Jan 28, 2021)

Published in:
- Mon.Not.Roy.Astron.Soc. 503 (2021) 1, 715-725,
- Mon.Not.Roy.Astron.Soc. 511 (2022) 3, 3208-3209 (erratum),
- Mon.Not.Roy.Astron.Soc. 511 (2022) 3, 3208-3209 (erratum)
•
e-Print:
- 2102.01500 [astro-ph.HE]

pdf

reference search5 citations

Chandra spectral measurements of the O supergiant

\zeta

Puppis indicate a surprising increase in the wind mass-loss rate over 18 yr

#3

et al.

(Jun 16, 2020)

Published in:
- Mon.Not.Roy.Astron.Soc. 499 (2020) 4, 6044-6052
•
e-Print:
- 2006.09135 [astro-ph.SR]

pdfDOI

reference search5 citations

A JVLA survey of the high frequency radio emission of the massive magnetic B- and O-type stars

#4

Sushma Kurapati
(
- NCRA, Ganeshkhind
)
,
Poonam Chandra
(
- NCRA, Ganeshkhind
)
,
Gregg Wade
(
- Royal Military Coll., Canada
)
,
David H. Cohen
(
- Swarthmore Coll.
)
,
Alexandre David-Uraz
(
- Florida Inst. Tech.
)

et al.

(Nov 1, 2016)

Published in:
- Mon.Not.Roy.Astron.Soc. 465 (2017) 2, 2160-2169
•
e-Print:
- 1611.00346 [astro-ph.SR]

pdfDOI

reference search5 citations

Measuring mass-loss rates and constraining shock physics using X-ray line profiles of O stars from the Chandra archive

#5

David H. Cohen
(
- Swarthmore Coll.
)
,
Emma E. Wollman
(
- Swarthmore Coll. and
- Caltech
)
,
Maurice A. Leutenegger
(
- NASA, Goddard and
- CRESST, Greenbelt and
- Maryland U.
)
,
Jon O. Sundqvist
(
- Delaware U., Bartol Inst. and
- Munich U.
)
,
Alex W. Fullerton
(
- Baltimore, Space Telescope Sci.
)

et al.

(Jan 30, 2014)

Published in:
- Mon.Not.Roy.Astron.Soc. 439 (2014) 1, 908-923
•
e-Print:
- 1401.7995 [astro-ph.SR]

pdfDOI

reference search27 citations

Constraints on porosity and mass loss in O-star winds from modeling of X-ray emission line profile shapes

#6

(May 23, 2013)

Published in:
- Astrophys.J. 770 (2013) 80,
- Astrophys.J. 777 (2013) 81 (erratum)
•
e-Print:
- 1305.5595 [astro-ph.SR]

pdf

reference search9 citations

Thin-shell mixing in radiative wind-shocks and the Lx-Lbol scaling of O-star X-rays

#7

(Dec, 2012)

Published in:
- Mon.Not.Roy.Astron.Soc. 429 (2013) 3379
•
e-Print:
- 1212.4235 [astro-ph.SR]

pdfDOI

reference search31 citations

An X-ray Survey of Colliding Wind Binaries

#8

et al.

(May, 2012)

Published in:
- ASP Conf.Ser. 465 (2012) 301
•
e-Print:
- 1205.3510 [astro-ph.HE]

pdf

reference search10 citations

A generalised porosity formalism for isotropic and anisotropic effective opacity and its effects on X-ray line attenuation in clumped O star winds

#9

(Nov, 2011)

Published in:
- Mon.Not.Roy.Astron.Soc. 420 (2012) 1553
•
e-Print:
- 1111.1762 [astro-ph.SR]

pdfDOI

reference search16 citations

Chandra X-ray spectroscopy of the very early O supergiant HD 93129A: constraints on wind shocks and the mass-loss rate

#10

et al.

(Apr, 2011)

Published in:
- Mon.Not.Roy.Astron.Soc. 415 (2011) 3354
•
e-Print:
- 1104.4786 [astro-ph.SR]

pdfDOI

reference search29 citations

Carina OB Stars: X-ray Signatures of Wind Shocks and Magnetic Fields

#11

et al.

(Mar, 2011)

Published in:
- Astrophys.J.Suppl. 194 (2011) 5
•
e-Print:
- 1103.1149 [astro-ph.SR]

pdfDOI

reference search49 citations

An Introduction to the Chandra Carina Complex Project

#12

et al.

(Feb, 2011)

Published in:
- Astrophys.J.Suppl. 194 (2011) 1
•
e-Print:
- 1102.4779 [astro-ph.SR]

pdfDOI

reference search62 citations

X-ray spectral diagnostics of activity in massive stars

#13

(Sep, 2010)

Published in:
- IAU Symp. 272 (2011) 348
•
Contribution to:
- IAU Symposium 272, 348
•
e-Print:
- 1009.5669 [astro-ph.SR]

pdfDOI

reference search1 citation

Modeling broadband X-ray absorption of massive star winds

#14

et al.

(Jul, 2010)

Published in:
- Astrophys.J. 719 (2010) 1767-1774
•
e-Print:
- 1007.0783 [astro-ph.SR]

pdfDOI

reference search25 citations

A mass-loss rate determination for zeta Puppis from the quantitative analysis of X-ray emission line profiles

#15

et al.

(Mar, 2010)

Published in:
- Mon.Not.Roy.Astron.Soc. 405 (2010) 2391
•
e-Print:
- 1003.0892 [astro-ph.SR]

pdfDOI

reference search38 citations

No Transition Disk? Infrared Excess, PAH, H2, and X-rays from the Weak-Lined T Tauri Star DoAr 21

#16

(Jul, 2009)

Published in:
- Astrophys.J. 703 (2009) 252-269
•
e-Print:
- 0907.4980 [astro-ph.SR]

pdfDOI

reference search11 citations

X-ray emission from O stars

#17

David H. Cohen

(Feb, 2008)

Published in:
- IAU Symp. 250 (2008) 17
•
Contribution to:
- IAU Symposium 250, 17
•
e-Print:
- 0802.0046 [astro-ph]

pdfDOI

reference search1 citation

X-rays from magnetically channeled winds of OB stars

#18

David H. Cohen

(Jan, 2008)

e-Print:
- 0801.4780 [astro-ph]

pdf

reference search0 citations

Quantitative analysis of resolved X-ray emission line profiles of O stars

#19

(Dec, 2007)

e-Print:
- 0712.1050 [astro-ph]

pdf

reference search2 citations

Measurements and analysis of helium-like triplet ratios in the X-ray spectra of O-type stars

#20

(Jun, 2006)

Published in:
- Astrophys.J. 650 (2006) 1096-1110
•
e-Print:
- astro-ph/0606370 [astro-ph]

linksDOI

reference search47 citations

The effect of porosity on x-ray emission line profiles from hot-star winds

#21

(Feb, 2006)

Published in:
- Astrophys.J. 648 (2006) 565-571
•
e-Print:
- astro-ph/0602054 [astro-ph]

pdfDOI

reference search80 citations

Wind signatures in the x-ray emission line profiles of the late o supergiant zeta orionis

#22

David H. Cohen
(
- Swarthmore Coll. and
- Columbia U. and
- Columbia U., Astron. Astrophys. and
- St. John's Coll., Annapolis and
- Prism Comp. Sci., Madison and
- Delaware U., Bartol Inst.
)
,
Maurice A. Leutenegger
(
- Swarthmore Coll. and
- Columbia U. and
- Columbia U., Astron. Astrophys. and
- St. John's Coll., Annapolis and
- Prism Comp. Sci., Madison and
- Delaware U., Bartol Inst.
)
,
Kevin T. Grizzard
(
- Swarthmore Coll. and
- Columbia U. and
- Columbia U., Astron. Astrophys. and
- St. John's Coll., Annapolis and
- Prism Comp. Sci., Madison and
- Delaware U., Bartol Inst.
)
,
Catherine L. Reed
(
- Swarthmore Coll. and
- Columbia U. and
- Columbia U., Astron. Astrophys. and
- St. John's Coll., Annapolis and
- Prism Comp. Sci., Madison and
- Delaware U., Bartol Inst.
)
,
Roban H. Kramer
(
- Swarthmore Coll. and
- Columbia U. and
- Columbia U., Astron. Astrophys. and
- St. John's Coll., Annapolis and
- Prism Comp. Sci., Madison and
- Delaware U., Bartol Inst.
)

et al.

(Feb, 2006)

Published in:
- Mon.Not.Roy.Astron.Soc. 368 (2006) 1905-1916
•
e-Print:
- astro-ph/0602599 [astro-ph]

pdfDOI

reference search32 citations

Chandra HETGS multi-phase spectroscopy of the young magnetic O star theta**^1 Orionis C

#23

Marc Gagne
(
- West Chester U., Geo. Astron. Dept. and
- Swarthmore Coll. and
- North Carolina State U. and
- Delaware U., Bartol Inst. and
- Delaware U. and
- Columbia U., Astron. Astrophys. and
- Prism Comp. Sci., Madison
)
,
Mary E. Oksala
(
- West Chester U., Geo. Astron. Dept. and
- Swarthmore Coll. and
- North Carolina State U. and
- Delaware U., Bartol Inst. and
- Delaware U. and
- Columbia U., Astron. Astrophys. and
- Prism Comp. Sci., Madison
)
,
David H. Cohen
(
- West Chester U., Geo. Astron. Dept. and
- Swarthmore Coll. and
- North Carolina State U. and
- Delaware U., Bartol Inst. and
- Delaware U. and
- Columbia U., Astron. Astrophys. and
- Prism Comp. Sci., Madison
)
,
Stephanie K. Tonnesen
(
- West Chester U., Geo. Astron. Dept. and
- Swarthmore Coll. and
- North Carolina State U. and
- Delaware U., Bartol Inst. and
- Delaware U. and
- Columbia U., Astron. Astrophys. and
- Prism Comp. Sci., Madison
)
,
Asif ud-Doula
(
- West Chester U., Geo. Astron. Dept. and
- Swarthmore Coll. and
- North Carolina State U. and
- Delaware U., Bartol Inst. and
- Delaware U. and
- Columbia U., Astron. Astrophys. and
- Prism Comp. Sci., Madison
)

et al.

(Apr, 2005)

Published in:
- Astrophys.J. 628 (2005) 986-1005,
- Astrophys.J. 634 (2005) 712 (erratum)
•
e-Print:
- astro-ph/0504296 [astro-ph]

pdfDOI

reference search133 citations

Diagnostics of disks around hot stars

#24

David H. Cohen
(
- Swarthmore Coll.
)
,
Margaret M. Hanson
(
- Cincinnati U.
)
,
Richard H.D. Townsend
(
- Delaware U., Bartol Inst.
)
,
Karen S. Bjorkman
(
- Toledo U.
)
,
Marc Gagne
(
- West Chester U., Geo. Astron. Dept.
)

(Oct, 2004)

Published in:
- ASP Conf.Ser. 337 (2005) 59
•
e-Print:
- astro-ph/0410317 [astro-ph]

pdf

reference search2 citations

High - resolution Chandra spectroscopy of Gamma Cassiopeia (B0.5IVe)

#25

Myron A. Smith
(
- Catholic U. and
- Baltimore, Space Telescope Sci.
)
,
David H. Cohen
(
- Swarthmore Coll.
)
,
Ming Feng Gu
(
- MIT, MKI
)
,
Richard D. Robinson
(
- Catholic U. and
- Johns Hopkins U.
)
,
Nancy Remage Evans
(
- Harvard-Smithsonian Ctr. Astrophys.
)

et al.

(Sep, 2003)

Published in:
- Astrophys.J. 600 (2004) 972-985
•
e-Print:
- astro-ph/0309293 [astro-ph]

pdfDOI

reference search40 citations

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