2020MNRAS.499.6044C

Query : 2020MNRAS.499.6044C

2020MNRAS.499.6044C - Mon. Not. R. Astron. Soc., 499, 6044-6052 (2020/December-3)

Chandra spectral measurements of the O supergiant ζ Puppis indicate a surprising increase in the wind mass-loss rate over 18 yr.

COHEN D.H., WANG J., PETIT V., LEUTENEGGER M.A., DAKIR L., MAYHUE C. and DAVID-URAZ A.

Abstract (from CDS):

New long Chandra grating observations of the O supergiant ζ Pup show not only a brightening of the X-ray emission line flux of 13 per cent in the 18 yr since Chandra's first observing cycle, but also clear evidence - at more than 4σ significance - of increased wind absorption signatures in its Doppler-broadened line profiles. We demonstrate this with non-parametric analysis of the profiles as well as Gaussian fitting and then use line-profile model fitting to derive a mass-loss rate of 2.47 ± 0.09 x 10–6M☉∼yr–1, which is a 40 per cent increase over the value obtained from the cycle 1 data. The increase in the individual emission line fluxes is greater for short-wavelength lines than long-wavelength lines, as would be expected if a uniform increase in line emission is accompanied by an increase in the wavelength-dependent absorption by the cold wind in which the shock-heated plasma is embedded.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): radiative transfer - stars: early-type - stars individual: z Puppis - stars: massive - stars: mass-loss - stars: winds, outflows - X-rays: stars

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1190 1

Query : 2020MNRAS.499.6044C

Basic data :
* zet Pup -- BY Dra Variable
Other object types: otypes_help 		* (1971PW&SO,*,...), X (2E,1ES,...), UV (CEL,EUVE,...), Rad (MOST,[BVP2003]), BY* (2012NewAR), Em* (EM*), Pu* (2009yCat), V* (V*), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		08 03 35.04754 -40 00 11.3321 (Optical) [ 0.79 0.70 90 ] A 2007A&A...474..653V
FK4 coord. (ep=B1950 eq=1950) : 		08 01 49.55118 -39 51 40.7918 [ 0.79 0.70 90 ]
Gal coord. (ep=J2000) : 		255.97588294 -04.70568514 [ 0.79 0.70 90 ]
Proper motions mas/yr : 		-29.71 16.68 [0.08 0.09 0] A 2007A&A...474..653V
Radial velocity / Redshift / cz : 		V(km/s) -23.90 [2.9] / z(~) -0.000080 [0.000010] / cz -23.90 [2.90]
   C 2006AstL...32..759G
Parallaxes (mas): 		3.01 [0.10] A 2007A&A...474..653V
Spectral type: 		O4I(n)fp C 2014ApJS..211...10S
Fluxes (9) :
U 0.89 [~] C 2002yCat.2237....0D
B 1.98 [~] C 2002yCat.2237....0D
V 2.25 [~] C 2002yCat.2237....0D
R 2.36 [~] C 2002yCat.2237....0D
G 2.254294 [0.009032] C 2022yCat.1355....0G
I 2.58 [~] C 2002yCat.2237....0D
J 2.76 [~] C 2002yCat.2237....0D
H 2.82 [~] C 2002yCat.2237....0D
K 2.90 [~] C 2002yCat.2237....0D
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Identifiers (54) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* zet Pup GC 10947 MOST 0801-398 UBV 7751
ALS 949 GCRV 5359 N30 1854 UBV M 13965
CD-39 3939 GEN# +1.00066811 NAME Naos UCAC4 250-023940
CEL 2154 GOS G255.98-04.71 01 PMC 90-93 223 uvby98 100066811
CGO 179 GSC 07663-04093 PPM 312524 V* zet Pup
CMC 198752 HD 66811 ROT 1295 WEB 7714
CPC 18 3433 HIC 39429 1RXS J080335.8-400110 2XMM J080335.0-400011
CPD-39 2011 HIP 39429 SACS 175 [B10] 2141
2E 1910 HR 3165 SAO 198752 [BVP2003] S2
2E 0801.8-3951 IRAS 08018-3951 SKY# 15171 [HJ56] 111
EM* CDS 710 JP11 1626 SRS 30306 EQ 0801-39.8
1ES 0801-39.8 LS 949 TD1 11723 Gaia DR3 5534788672055388032
EUVE J0803-40.0 2MASS J08033506-4000112 TIC 133422778
FK5 306 MCW 547 TYC 7663-4093-1

References (1190 between 1850 and 2026) (Total 1190)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 8    Rot : 6    Fe/H : 5    Plx : 2    PM : 4    SpT : 26   

   

Observing logs
Herschel : 4    IUE : 54    XMM : 11   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : * zet Pup

Link by name to the catalogue in VizieR :

ALS 949 CD-39 3939 CEL 2154 CPD-39 2011 2E 1910
EUVE J0803-40.0 FK5 306 GSC 07663-04093 HD 66811 HIC 39429
HIP 39429 HR 3165 IRAS 08018-3951 LS 949 2MASS J08033506-4000112
PPM 312524 1RXS J080335.8-400110 SAO 198752 TD1 11723 TYC 7663-4093-1
UCAC4 250-023940 uvby98 100066811 V* zet Pup Gaia DR3 5534788672055388032

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